Product family data sheet
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and
EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
Cree, Inc.
4600 Silicon Drive
Durham, NC 27703
USA Tel: +1.919.313.5300
WWW.CREE.COM/XLAMP
CLD-DS78 REV 6A
Cree® XLamp® CXA1820 LED
PRODUCT DESCRIPTION
The XLamp® CXA1820 LED array expands
Cree’s family of high‑ux, multi‑die
arrays, offering high performance in an
easy‑to‑use platform. With XLamp LED
lighting‑class reliability, the CXA1820’s
uniform emitting surface enables both
directional and non‑directional lighting
applications and luminaire designs.
Available in 2‑step, 3‑step and 4‑step
color consistency, and featuring a
12‑mm optical source, the CXA1820
brings new levels of ux and efcacy to
this form factor.
The CX Family LED Design Guide
provides basic information on the
requirements to use the CXA1820 LED
successfully in luminaire designs.
FEATURES
• Available in 4‑step, 3‑step and 2‑step
EasyWhite® bins at 2700K, 3000K,
3500K, 4000K & 5000K CCT and
4‑step EasyWhite bins at 5700K &
6500K CCT
• Available in ANSI white bins at
4000K, 5000K, 5700K & 6500K
CCT
• Available in 70‑, 80‑, 90‑ and
93‑minimum CRI options
• Forward voltage option: 36‑V class
• 85°C binning and characterization
• Maximum drive current: 1050mA
• 115° viewing angle, uniform
chromaticity profile
• Top‑side solder connections
• Thermocouple attach point
• NEMA SSL‑3 2011 standard ux bins
• RoHS and REACh compliant
• UL® recognized component
(E349212)
TABLE OF CONTENTS
Characteristics ............................................2
Operating Limits ..........................................2
Flux Characteristics, EasyWhite® Order
Codes and Bins ...........................................3
Flux Characteristics, ANSI White Order
Codes and Bins ...........................................6
Relative Spectral Power Distribution .........7
Electrical Characteristics ............................7
Relative Luminous Flux ...............................8
Typical Spatial Distribution .........................9
Performance Groups ‑ Brightness .............9
Performance Groups ‑ Chromaticity ....... 10
Cree EasyWhite® Bins Plotted on the
1931 CIE Color Space .............................. 13
Cree ANSI White Bins Plotted on the
1931 CIE Color Space .............................. 13
Bin and Order Code Formats ................... 14
Mechanical Dimensions .......................... 14
Thermal Design ........................................ 15
Notes ........................................................ 16
Packaging ................................................. 17
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
2
XLamp® CXa1820 LED
CHARACTERISTICS
Characteristics Unit Minimum Typical Maximum
Viewing angle (FWHM) degrees 115
ESD withstand voltage (HBM per Mil‑Std‑883D) V 8000
DC forward current mA 1050*
Reverse current mA 0.1
Forward voltage (@ 550mA, 85°C) V36.2
Forward voltage (@ 550mA, 25°C) V42
* Refer to the Operating Limits section.
OPERATING LIMITS
The maximum current rating of the CXA1820 depends on the case temperature (Tc) when the LED has reached thermal equilibrium under
steady‑state operation. The graph shown below assumes that the system design employs good thermal management (thermal interface
material and heat sink) and may vary when poor thermal management is employed. Please refer to the Mechanical Dimensions section
on page 14 for the location of the Tc measurement point.
Another important factor in good thermal management is the temperature of the Light Emitting Surface (LES). Cree recommends a
maximum LES temperature of 135°C to ensure optimal LED lifetime. Please refer to the Thermal Design section on page 15 for more
information on LES temperature measurement.
CXA1820
0
200
400
600
800
1000
1200
025 50 75 100 125 150
If (mA)
Case Temperature (°C)
CXA1820
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
3
XLamp® CXa1820 LED
Notes
• Cree maintains a tolerance of ±7% on ux and power measurements, ±0.005 on chromaticity (CCx, CCy) measurements and a tolerance of ±2 on CRI
measurements. See the Measurements section (page 16).
• Cree XLamp CXA1820 LED order codes specify only a minimum ux bin and not a maximum. Cree may ship reels in ux bins higher than the minimum
specied by the order code without advance notice. Shipments will always adhere to the chromaticity bin restrictions specied by the order code.
* Flux values @ 25°C are calculated and for reference only.
FLUX CHARACTERISTICS, EASYWHITE® ORDER CODES AND BINS (IF mA, TJ 
The following table provides order codes for XLamp CXA1820 LEDs. For a complete description of the order code nomenclature, please
see the Bin and Order Code Formats section (page 13).
Nominal
CCT
CRI Minimum Luminous Flux 2-Step 3-Step 4-Step
Min Typ Group 


 Group Order Code Group Order Code Group Order Code
6500 K
70 75
Q4 2260 2560
65F
CXA1820-0000-
000N00Q465F
R2 2420 2741 CXA1820-0000-
000N00R265F
R4 2600 2916 CXA1820-0000-
000N00R465F
80 ---
Q2 2100 2379
65F
CXA1820-0000-
000N0HQ265F
Q4 2260 2560 CXA1820-0000-
000N0HQ465F
R2 2420 2741 CXA1820-0000-
000N0HR265F
5700 K
70 75
Q4 2260 2560
57F
CXA1820-0000-
000N00Q457F
R2 2420 2741 CXA1820-0000-
000N00R257F
R4 2600 2916 CXA1820-0000-
000N00R457F
80 ---
Q2 2100 2379
57F
CXA1820-0000-
000N0HQ257F
Q4 2260 2560 CXA1820-0000-
000N0HQ457F
R2 2420 2741 CXA1820-0000-
000N0HR257F
5000K
70 75
Q4 2260 2560
50H
CXA1820-0000-
000N00Q450H
50F
CXA1820-0000-
000N00Q450F
R2 2420 2741 CXA1820-0000-
000N00R250H
CXA1820-0000-
000N00R250F
R4 2600 2916 CXA1820-0000-
000N00R450H
CXA1820-0000-
000N00R450F
80 ---
Q2 2100 2379
50H
CXA1820-0000-
000N0HQ250H
50G
CXA1820-0000-
000N0HQ250G
50F
CXA1820-0000-
000N0HQ250F
Q4 2260 2560 CXA1820-0000-
000N0HQ450H
CXA1820-0000-
000N0HQ450G
CXA1820-0000-
000N0HQ450F
R2 2420 2741 CXA1820-0000-
000N0HR250H
CXA1820-0000-
000N0HR250G
CXA1820-0000-
000N0HR250F
90 95
P2 1830 2073
50H
CXA1820-0000-
000N0UP250H
50G 50F
CXA1820-0000-
000N0UP250F
P4 1965 2226 CXA1820-0000-
000N0UP450H
CXA1820-0000-
000N0UP450G
CXA1820-0000-
000N0UP450F
Q2 2100 2379 CXA1820-0000-
000N0UQ250H
CXA1820-0000-
000N0UQ250G
CXA1820-0000-
000N0UQ250F
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
4
XLamp® CXa1820 LED
Notes
• Cree maintains a tolerance of ±7% on ux and power measurements, ±0.005 on chromaticity (CCx, CCy) measurements and a tolerance of ±2 on CRI
measurements. See the Measurements section (page 16).
• Cree XLamp CXA1820 LED order codes specify only a minimum ux bin and not a maximum. Cree may ship reels in ux bins higher than the minimum
specied by the order code without advance notice. Shipments will always adhere to the chromaticity bin restrictions specied by the order code.
* Flux values @ 25°C are calculated and for reference only.
Nominal
CCT
CRI Minimum Luminous Flux 2-Step 3-Step 4-Step
Min Typ Group 


 Group Order Code Group Order Code Group Order Code
4000K
70 75
Q4 2260 2560
40H
CXA1820-0000-
000N00Q440H
40F
CXA1820-0000-
000N00Q440F
R2 2420 2741 CXA1820-0000-
000N00R240H
CXA1820-0000-
000N00R240F
R4 2600 2916 CXA1820-0000-
000N00R440H
CXA1820-0000-
000N00R440F
80 ---
Q2 2100 2379
40H
CXA1820-0000-
000N0HQ240H
40G
CXA1820-0000-
000N0HQ240G
40F
CXA1820-0000-
000N0HQ240F
Q4 2260 2560 CXA1820-0000-
000N0HQ440H
CXA1820-0000-
000N0HQ440G
CXA1820-0000-
000N0HQ440F
R2 2420 2741 CXA1820-0000-
000N0HR240H
CXA1820-0000-
000N0HR240G
CXA1820-0000-
000N0HR240F
90 95
N4 1710 1937
40H
CXA1820-0000-
000N0UN440H
40G 40F
CXA1820-0000-
000N0UN440F
P2 1830 2073 CXA1820-0000-
000N0UP240H
CXA1820-0000-
000N0UP240G
CXA1820-0000-
000N0UP240F
P4 1965 2226 CXA1820-0000-
000N0UP440H
CXA1820-0000-
000N0UP440G
CXA1820-0000-
000N0UP440F
3500K
80 ---
Q2 2100 2379
35H
CXA1820-0000-
000N00Q235H
35G 35F
CXA1820-0000-
000N00Q235F
Q4 2260 2560 CXA1820-0000-
000N00Q435H
CXA1820-0000-
000N00Q435G
CXA1820-0000-
000N00Q435F
R2 2420 2741 CXA1820-0000-
000N00R235H
CXA1820-0000-
000N00R235G
CXA1820-0000-
000N00R235F
93 95
N2 1590 1801
35H
CXA1820-0000-
000N0YN235H
35G 35F
CXA1820-0000-
000N0YN235F
N4 1710 1937 CXA1820-0000-
000N0YN435H
CXA1820-0000-
000N0YN435G
CXA1820-0000-
000N0YN435F
P2 1830 2073 CXA1820-0000-
000N0YP235H
CXA1820-0000-
000N0YP235G
CXA1820-0000-
000N0YP235F
3000K
80 ---
P4 1965 2226
30H
CXA1820-0000-
000N00P430H
30G
CXA1820-0000-
000N00P430G
30F
CXA1820-0000-
000N00P430F
Q2 2100 2379 CXA1820-0000-
000N00Q230H
CXA1820-0000-
000N00Q230G
CXA1820-0000-
000N00Q230F
Q4 2260 2535 CXA1820-0000-
000N00Q430H
CXA1820-0000-
000N00Q430G
CXA1820-0000-
000N00Q430F
93 95
M4 1485 1682
30H
CXA1820-0000-
000N0YM430H
30G 30F
CXA1820-0000-
000N0YM430F
N2 1590 1801 CXA1820-0000-
000N0YN230H
CXA1820-0000-
000N0YN230G
CXA1820-0000-
000N0YN230F
N4 1710 1937 CXA1820-0000-
000N0YN430H
CXA1820-0000-
000N0YN430G
CXA1820-0000-
000N0YN430F
FLUX CHARACTERISTICS, EASYWHITE® ORDER CODES AND BINS (IF mA, TJ 
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
5
XLamp® CXa1820 LED
Notes
• Cree maintains a tolerance of ±7% on ux and power measurements, ±0.005 on chromaticity (CCx, CCy) measurements and a tolerance of ±2 on CRI
measurements. See the Measurements section (page 16).
• Cree XLamp CXA1820 LED order codes specify only a minimum ux bin and not a maximum. Cree may ship reels in ux bins higher than the minimum
specied by the order code without advance notice. Shipments will always adhere to the chromaticity bin restrictions specied by the order code.
* Flux values @ 25°C are calculated and for reference only.
Nominal
CCT
CRI Minimum Luminous Flux 2-Step 3-Step 4-Step
Min Typ Group 


 Group Order Code Group Order Code Group Order Code
2700K
80 ---
P4 1965 2226
27H
CXA1820-0000-
000N00P427H
27G
CXA1820-0000-
000N00P427G
27F
CXA1820-0000-
000N00P427F
Q2 2100 2379 CXA1820-0000-
000N00Q227H
CXA1820-0000-
000N00Q227G
CXA1820-0000-
000N00Q227F
Q4 2260 2535 CXA1820-0000-
000N00Q427H
CXA1820-0000-
000N00Q427G
CXA1820-0000-
000N00Q427F
93 95
M2 1380 1563
27H
CXA1820-0000-
000N0YM227H
27G 27F
CXA1820-0000-
000N0YM227F
M4 1485 1682 CXA1820-0000-
000N0YM427H
CXA1820-0000-
000N0YM427G
CXA1820-0000-
000N0YM427F
N2 1590 1801 CXA1820-0000-
000N0YN227H
CXA1820-0000-
000N0YN227G
CXA1820-0000-
000N0YN227F
FLUX CHARACTERISTICS, EASYWHITE® ORDER CODES AND BINS (IF mA, TJ 
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
6
XLamp® CXa1820 LED
Notes
• Cree maintains a tolerance of ±7% on ux and power measurements, ±0.005 on chromaticity (CCx, CCy) measurements and a tolerance of ±2 on CRI
measurements. See the Measurements section (page 16).
• Cree XLamp CXA1820 LED order codes specify only a minimum ux bin and not a maximum. Cree may ship reels in ux bins higher than the minimum
specied by the order code without advance notice. Shipments will always adhere to the chromaticity bin restrictions specied by the order code.
* Flux values @ 25°C are calculated and for reference only.
FLUX CHARACTERISTICS, ANSI WHITE ORDER CODES AND BINS (IF mA, TJ 
The following table provides order codes for XLamp CXA1820 LEDs. For a complete description of the order code nomenclature, please
see the Bin and Order Code Formats section (page 13).
Nominal
CCT
CRI Minimum Luminous Flux
Chromaticity Regions Order Code
Min Typ Group 



6500 K
70 75
Q4 2260 2560
1A0, 1B0, 1C0, 1D0, 65F
CXA1820‑0000‑000N00Q40E1
R2 2420 2741 CXA1820‑0000‑000N00R20E1
R4 2600 2916 CXA1820‑0000‑000N00R40E1
80 ---
Q2 2100 2379
1A0, 1B0, 1C0, 1D0, 65F
CXA1820‑0000‑000N0HQ20E1
Q4 2260 2560 CXA1820‑0000‑000N0HQ40E1
R2 2420 2741 CXA1820‑0000‑000N0HR20E1
5700 K
70 75
Q4 2260 2560
2A0, 2B0, 2C0, 2D0, 57F
CXA1820‑0000‑000N00Q40E2
R2 2420 2741 CXA1820‑0000‑000N00R20E2
R4 2600 2916 CXA1820‑0000‑000N00R40E2
80 ---
Q2 2100 2379
2A0, 2B0, 2C0, 2D0, 57F
CXA1820‑0000‑000N0HQ20E2
Q4 2260 2560 CXA1820‑0000‑000N0HQ40E2
R2 2420 2741 CXA1820‑0000‑000N0HR20E2
5000K
70 75
Q4 2260 2560
3A0, 3B0, 3C0, 3D0, 50F
CXA1820‑0000‑000N00Q40E3
R2 2420 2741 CXA1820‑0000‑000N00R20E3
R4 2600 2916 CXA1820‑0000‑000N00R40E3
80 ---
Q2 2100 2379
3A0, 3B0, 3C0, 3D0, 50F
CXA1820‑0000‑000N0HQ20E3
Q4 2260 2560 CXA1820‑0000‑000N0HQ40E3
R2 2420 2741 CXA1820‑0000‑000N0HR20E3
4000K 70 75
Q4 2260 2560
5A0, 5B0, 5C0, 5D0, 40F
CXA1820‑0000‑000N00Q40E5
R2 2420 2741 CXA1820‑0000‑000N00R20E5
R4 2600 2916 CXA1820‑0000‑000N00R40E5
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
7
XLamp® CXa1820 LED
RELATIVE SPECTRAL POWER DISTRIBUTION
The following graph is the result of a series of pulsed measurements at 550mA and TJ = 85°C.
ELECTRICAL CHARACTERISTICS
The following graph is the result of a series of steady‑state measurements.
Relative Spectral Power Distribution
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
380 430 480 530 580 630 680 730 780
Relative Spectral Power
Wavelength (nm)
5000 K, 70 CRI
4000 K, 70 CRI
3000 K, 80 CRI
3000 K, 93 CRI
34
35
36
37
38
39
40
41
350 450 550 650 750 850 950 1050
Voltage (V)
Current (mA)
Tc = 25 °C
Tc = 55 °C
Tc = 85 °C
Tc = 105 °C
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
8
XLamp® CXa1820 LED
RELATIVE LUMINOUS FLUX
The relative luminous ux values provided below are the ratio of:
• Measurements of CXA1820 at steady‑state operation at the given conditions, divided by
• Flux measured during binning, which is a pulsed measurement at 550mA at TJ = 85°C.
For example, at steady‑state operation of Tc = 55°C, IF = 850mA, the relative luminous ux ratio is 140% in the chart below. A CXA1820
LED that measures 2100lm during binning will deliver 2940lm (2100 * 1.4) at steady‑state operation of Tc = 55°C, IF = 850mA.
0%
20%
40%
60%
80%
100%
120%
140%
160%
180%
350 450 550 650 750 850 950 1050
Relative Luminous Flux
Current (mA)
Tc = 25 °C
Tc = 55 °C
Tc = 85 °C
Tc = 105 °C
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
9
XLamp® CXa1820 LED
TYPICAL SPATIAL DISTRIBUTION
PERFORMANCE GROUPS - BRIGHTNESS (IFmA, TJ
XLamp CXA1820 LEDs are tested for luminous ux and placed into one of the following bins.
Group Code Minimum Luminous Flux Maximum Luminous Flux
M2 1380 1485
M4 1485 1590
N2 1590 1710
N4 1710 1830
P2 1830 1965
P4 1965 2100
Q2 2100 2260
Q4 2260 2420
R2 2420 2600
R4 2600 2780
S2 2780 2990
Far Field
0%
20%
40%
60%
80%
100%
-90 -70 -50 -30 -10 10 30 50 70 90
Relative Luminous Intensity
Angle (º)
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
10
XLamp® CXa1820 LED
PERFORMANCE GROUPS - CHROMATICITY (TJ
XLamp CXA1820 LEDs are tested for chromaticity and placed into one of the regions dened by the following bounding coordinates.
EasyWhite Color Temperatures – 2-Step
Code CCT x y
50H 5000 K
0.3429 0.3507
0.3434 0.3571
0.3475 0.3604
0.3469 0.3539
40H 4000 K
0.3784 0.3741
0.3804 0.3818
0.3867 0.3857
0.3844 0.3778
35H 3500 K
0.4030 0.3857
0.4061 0.3941
0.4132 0.3976
0.4099 0.3890
30H 3000 K
0.4291 0.3973
0.4333 0.4062
0.4395 0.4084
0.4351 0.3994
27H 2700 K
0.4528 0.4046
0.4578 0.4138
0.4638 0.4152
0.4586 0.4060
EasyWhite Color Temperatures – 3-Step Ellipse
Bin Code CCT Center Point Major Axis Minor Axis Rotation Angle

x y a b
50G 5000K 0.3447 0.3553 0.00840 0.00312 65.0
40G 4000K 0.3818 0.3797 0.00939 0.00402 53.7
35G 3500K 0.4073 0.3917 0.00927 0.00414 54.0
30G 3000K 0.4338 0.4030 0.00834 0.00408 53.2
27G 2700K 0.4577 0.4099 0.00834 0.00420 48.5
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
11
XLamp® CXa1820 LED
PERFORMANCE GROUPS - CHROMATICITY (TJ
EasyWhite Color Temperatures – 4-Step
Code CCT x y
65F 6500K
0.3097 0.3196
0.3079 0.3297
0.3164 0.3382
0.3176 0.3275
57F 5700K
0.3253 0.3325
0.3249 0.3439
0.3331 0.3514
0.3330 0.3393
50F 5000K
0.3407 0.3459
0.3415 0.3586
0.3499 0.3654
0.3484 0.3521
40F 4000K
0.3744 0.3685
0.3782 0.3837
0.3912 0.3917
0.3863 0.3758
35F 3500K
0.3981 0.3800
0.4040 0.3966
0.4186 0.4037
0.4116 0.3865
30F 3000K
0.4242 0.3919
0.4322 0.4096
0.4449 0.4141
0.4359 0.3960
27F 2700K
0.4475 0.3994
0.4573 0.4178
0.4695 0.4207
0.4589 0.4021
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
12
XLamp® CXa1820 LED
PERFORMANCE GROUPS - CHROMATICITY (TJ
ANSI White Bins
Code CCT Bin
Code x y
0E1 6500 K
1A0
0.3048 0.3207
0.3130 0.3290
0.3144 0.3186
0.3068 0.3113
1B0
0.3028 0.3304
0.3115 0.3391
0.3130 0.3290
0.3048 0.3207
1C0
0.3115 0.3391
0.3205 0.3481
0.3213 0.3373
0.3130 0.3290
1D0
0.3130 0.3290
0.3213 0.3373
0.3221 0.3261
0.3144 0.3186
ANSI White Bins
Code CCT Bin
Code x y
0E2 5700 K
2A0
0.3215 0.3350
0.3290 0.3417
0.3290 0.3300
0.3222 0.3243
2B0
0.3207 0.3462
0.3290 0.3538
0.3290 0.3417
0.3215 0.3350
2C0
0.3290 0.3538
0.3376 0.3616
0.3371 0.3490
0.3290 0.3417
2D0
0.3290 0.3417
0.3371 0.3490
0.3366 0.3369
0.3290 0.3300
ANSI White Bins
Code CCT Bin
Code x y
0E5 4000 K
5A0
.3670 .3578
.3702 .3722
.3825 .3798
.3783 .3646
5B0
.3702 .3722
.3736 .3874
.3869 .3958
.3825 .3798
5C0
.3825 .3798
.3869 .3958
.4006 .4044
.3950 .3875
5D0
.3783 .3646
.3825 .3798
.3950 .3875
.3898 .3716
ANSI White Bins
Code CCT Bin
Code x y
0E3 5000 K
3A0
.3371 .3490
.3451 .3554
.3440 .3427
.3366 .3369
3B0
.3376 .3616
.3463 .3687
.3451 .3554
.3371 .3490
3C0
.3463 .3687
.3551 .3760
.3533 .3620
.3451 .3554
3D0
.3451 .3554
.3533 .3620
.3515 .3487
.3440 .3427
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
13
XLamp® CXa1820 LED
CREE EASYWHITE® BINS PLOTTED ON THE 1931 CIE COLOR SPACE (TJ 
CREE ANSI WHITE BINS PLOTTED ON THE 1931 CIE COLOR SPACE (TJ 
2700 K
3000 K
3500 K
4000 K
4500 K
5000 K
5700 K
6500 K
0.31
0.32
0.33
0.34
0.35
0.36
0.37
0.38
0.39
0.40
0.41
0.42
0.43
0.44
0.30
0.31
0.32
0.33
0.34
0.35
0.36
0.37
0.38
0.39
0.40
0.41
0.42
0.43
0.44
0.45
0.46
0.47
0.48
0.49
CCx
ANSI C78.377 Quadrangle
EasyWhite 4-Step
EasyWhite 3-Step
EasyWhite 2-Step
4000 K
4500 K
5000 K
5700 K
6500 K
3A
3B
3C
3D
5A
5B
5C
5D
1A
1B
1C
1D
2A
2B
2C
2D
0.31
0.32
0.33
0.34
0.35
0.36
0.37
0.38
0.39
0.40
0.41
0.30
0.31
0.32
0.33
0.34
0.35
0.36
0.37
0.38
0.39
0.40
0.41
CCy
CCx
ANSI C78.377 Quadrangle
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
14
XLamp® CXa1820 LED
BIN AND ORDER CODE FORMATS
Bin codes and order codes are congured as follows:
Order Code Bin Code
SSSSSCC-HHHH-HHHGGRNNNNN
Series = CXA18
Internal code
CRI Specification
0 = Standard CRI
H = 80 CRI minimum
U = 90 CRI minimum
Y = 93 CRI minimum
Kit code
Vf class
N0 = 36-V class
Performance class
SSSSSCC-WWW-FF-GGR-AAAAA
Series = CXA18
Chromaticity bin
Vf class
N0 = 36-V class
Internal code
CRI Specification
B = 70 CRI minimum
H = 80 CRI minimum
U = 90 CRI minimum
Y = 93 CRI minimum
Flux bin
Performance class
MECHANICAL DIMENSIONS
Dimensions are in mm.
Tolerances unless otherwise
specied: ±.13
x° ±1°
Meaning of 1820N
1820N = 36‑V CXA1820
1820N
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
15
XLamp® CXa1820 LED
THERMAL DESIGN
The CXA family of LED arrays can include over a hundred different LED die inside one package, and thus over a hundred different junction
temperatures (TJ). Cree has intentionally removed junction‑temperature‑based operating limits and replaced the commonplace maximum
TJ calculations with maximum ratings based on forward current (IF) and case temperature (Tc). No additional calculations are required to
ensure that the CXA LED is being operated within its designed limits. LES temperature measurement provides additional verication of
good thermal design. Please refer to page 2 for the Operating Limit specications.
There is no need to calculate for TJ inside the package, as the thermal management design process, specically from TSP to ambient
(Ta), remains identical to any other LED component. For more information on thermal management of Cree XLamp LEDs, please refer to
the Thermal Management application note. For CXA soldering recommendations and more information on thermal interface materials
(TIM), LES temperature measurement, and connection methods, please refer to the Cree XLamp CX Family LEDs soldering and handling
document. The CX Family LED Design Guide provides basic information on the requirements to use Cree XLamp CXA LEDs successfully
in luminaire designs.
To keep the CXA1820 LED at or below the maximum rated Tc, the case to ambient temperature
thermal resistance (R_c‑a) must be at or below the maximum R_c‑a value shown on the following
graph, depending on the operating environment. The y‑axis in the graph is a base 10 logarithmic
scale.
As the gure at right shows, the R_c‑a value is the sum of the thermal resistance of the TIM (R_tim)
plus the thermal resistance of the heat sink (R_hs).
R_j-c
Tc
R_tim
R_hs
Ta
R_j-c
Tc
R_c-a
Ta
CXA1820
0.01
0.10
1.00
10.00
100.00
350 450 550 650 750 850 950 1050
Maximum R_c-a
Current (mA)
Ta = 25 °C
Ta = 55 °C
Ta = 85 °C
Ta = 105 °C
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
16
XLamp® CXa1820 LED
NOTES
Measurements
The luminous ux, radiant power, chromaticity, forward voltage and CRI measurements in this document are binning specications only
and solely represent product measurements as of the date of shipment. These measurements will change over time based on a number
of factors that are not within Cree’s control and are not intended or provided as operational specications for the products. Calculated
values are provided for informational purposes only and are not intended or provided as specications.

Please read the LED Reliability Overview for details of the qualication process Cree applies to ensure long‑term reliability for XLamp
LEDs and details of Cree’s pre‑release qualication testing for XLamp LEDs.
Lumen Maintenance
Cree now uses standardized IES LM‑80‑08 and TM‑21‑11 methods for collecting long‑term data and extrapolating LED lumen maintenance.
For information on the specic LM‑80 data sets available for this LED, refer to the public LM‑80 results document.
Please read the Long‑Term Lumen Maintenance application note for more details on Cree’s lumen maintenance testing and forecasting.
Please read the Thermal Management application note for details for details on how thermal design, ambient temperature, and drive
current affect the LED junction temperature.
RoHS Compliance
The levels of RoHS restricted materials in this product are below the maximum concentration values (also referred to as the threshold
limits) permitted for such substances, or are used in an exempted application, in accordance with EU Directive 2011/65/EC (RoHS2), as
implemented January 2, 2013. RoHS Declarations for this product can be obtained from your Cree representative or from the Product
Ecology section of the Cree website.
REACh Compliance
REACh substances of very high concern (SVHCs) information is available for this product. Since the European Chemical Agency (ECHA)
has published notice of their intent to frequently revise the SVHC listing for the foreseeable future, please contact a Cree representative to
insure you get the most up‑to‑date REACh SVHC Declaration. REACh banned substance information (REACh Article 67) is also available
upon request.
UL® Recognized Component
This product meets the requirements to be considered a UL Recognized Component with Level 4 enclosure consideration. The LED
package or a portion thereof has been investigated as a re and electrical enclosure per ANSI/UL 8750.
Vision Advisory
WARNING: Do not look at an exposed lamp in operation. Eye injury can result. For more information about LEDs and eye safety, please
refer to the LED Eye Safety application note.
Copyright © 2013-2017 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a
trademark of Cree, Inc. UL® and the UR logo are registered trademarks of UL LLC.
17
XLamp® CXa1820 LED
PACKAGING
Cree CXA1820 LEDs are packaged in trays of 20. Five trays are sealed in an anti‑static bag and placed inside a carton, for a total of 100
LEDs per carton. Each carton contains 100 LEDs from the same performance bin.
Dimensions are in inches.
Tolerances: ±.13
x° ± 1°
SIZE
TITLE
OF
REV.
SHEET
C
DRAWING NO.
DATE
DATE
DATE
CHECK
FINAL PROTECTIVE FINISH
MATERIAL
APPROVED
DRAWN BY
THIRD ANGLE PROJECTION
.X ± 0.1
X° ± 2 °
.XXX ± .010
.XX ± .03
.X ± .06
FOR SHEET METAL PARTS ONLY
.XX ± .05
.XXX ± .005
X° ± 1 °
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN
MILLIMETERS & BEFORE FINISH.
TOLERANCE UNLESS SPECIFIED:
SCALE
A
B
C
D
123456
6 5 4 3 2 1
A
B
C
D
Phone (919) 361-4770
Fax (919) 313-5303
4600 Silicon Drive
Durham, N.C 27703
UNAUTHORIZED PERSON WITHOUT
THE WRITTEN CONSENT
MAY NOT BE COPIED, REPRODUCED OR DISCLOSED TO ANY
CONFIDENTIAL INFORMATION OF CREE, INC. THIS PLOT
CONTAINED WITHIN ARE THE PROPRIETARY AND
CREE CONFIDENTIAL. THIS PLOT AND THE INFORMATION
OF CREE INC.
NOTICE
5.875
5.875
.38
R.375
.875
.875
1/10.500
A
CXA15XX_DATASHEET_BAG2013
CXA15XX_DATASHEET
LABEL WITH CREE
BIN CODE, QTY, LOT#
LABEL WITH CREE
BIN CODE, QTY, LOT#
BAG
LABEL WITH CREE
BIN CODE, QTY, LOT#
PATENT LABEL
IS LOCATED ON UNDERSIDE OF
CARTON
UNLESS OTHERWISE NOTED ALL
TOLERANCES ARE AS FOLLOWS:
PART DRAWING
DWG.TITLE
SIZE
B
DO NOT
SCALE DWG.
FRACT ±1/64 X.X" ±.030 X.0mm ±.75mm
ANGLES ±0°-30' X.XX" ±.015 X.Xmm ±.30mm
DRAFT ±1° X.XXX" ±.005 X.XXmm ±.10mm
THIS DRAWING CONTAINS PROPRIETARY DESIGN INFORMATION
AND REMAINS ALONG WITH THE PRODUCT OR PRODUCTS
REPRESENTED HEREIN THE PROPERTY OF TEK PAK, INCORPORATED.
THIS DOCUMENT AND THE INFORMATION IT CONTAINS
MAY NOT BE COPIED, TRANSMITTED, OR USED BY ANY
THIRD PARTY WITHOUT THE EXPRESS WRITTEN APPROVAL
OF TEK PAK, INCORPORATED.
.75
7.875
7.125
R.375
1.125
1.125
.75
.38 .19
SCALE: 0.750
DWG. NO.
022489-00
SHEET 2 OF 2
DATE:
4-3-13
DR. BY:
KJS
CHK. BY:
REV DESC. DATE BY CHK.
SECTION C-C
.38
PATENT LABEL IS LOCATED
ON UNDERSIDE OF CARTON
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
SIZE
TITLE
OF
REV.
SHEET
C
DRAWING NO.
DATE
DATE
DATE
CHECK
FINAL PROTECTIVE FINISH
MATERIAL
APPROVED
DRAWN BY
THIRD ANGLE PROJECTION
.X ± 0.1
X° ± 2 °
.XXX ± .010
.XX ± .03
.X ± .06
FOR SHEET METAL PARTS ONLY
.XX ± .05
.XXX ± .005
X° ± 1 °
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN
MILLIMETERS & BEFORE FINISH.
TOLERANCE UNLESS SPECIFIED:
SCALE
A
B
C
D
123456
6 5 4 3 2 1
A
B
C
D
Phone (919) 361-4770
Fax (919) 313-5303
4600 Silicon Drive
Durham, N.C 27703
UNAUTHORIZED PERSON WITHOUT
THE WRITTEN CONSENT
MAY NOT BE COPIED, REPRODUCED OR DISCLOSED TO ANY
CONFIDENTIAL INFORMATION OF CREE, INC. THIS PLOT
CONTAINED WITHIN ARE THE PROPRIETARY AND
CREE CONFIDENTIAL. THIS PLOT AND THE INFORMATION
OF CREE INC.
NOTICE
5.875
5.875
.38
R.375
.875
.875
1/10.500
A
CXA15XX_DATASHEET_BAG2013
CXA15XX_DATASHEET
BAG
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
LABEL WITH CREE BIN
CODE, QUANTITY, LOT #
PATENT LABEL IS LOCATED
ON UNDERSIDE OF COVER
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Cree, Inc.:
CXA1820-0000-000N00Q240F CXA1820-0000-000N00Q230F CXA1820-0000-000N00P430F CXA1820-0000-
000N00Q450F CXA1820-0000-000N0HQ250H CXA1820-0000-000N00Q430H CXA1820-0000-000N0YM227F
CXA1820-0000-000N0UN20E5 CXA1820-0000-000N00R250F CXA1820-0000-000N0UP20E5 CXA1820-0000-
000N00Q20E5 CXA1820-0000-000N0YN230F CXA1820-0000-000N00Q440F CXA1820-0000-000N0YN235H
CXA1820-0000-000N00R20E3 CXA1820-0000-000N00Q235F CXA1820-0000-000N0YN230H CXA1820-0000-
000N0UP240F CXA1820-0000-000N00P227H CXA1820-0000-000N0UP250H CXA1820-0000-000N0YM427F
CXA1820-0000-000N0UN450F CXA1820-0000-000N0YM430H CXA1820-0000-000N00P427F CXA1820-0000-
000N0UP40E3 CXA1820-0000-000N0UN40E5 CXA1820-0000-000N00R20E5 CXA1820-0000-000N0UN440F
CXA1820-0000-000N0YM435F CXA1820-0000-000N0HQ240F CXA1820-0000-000N0HQ20E3 CXA1820-0000-
000N0HQ450F CXA1820-0000-000N00R250H CXA1820-0000-000N0HP40E5 CXA1820-0000-000N0HR250F
CXA1820-0000-000N00P435F CXA1820-0000-000N00Q240H CXA1820-0000-000N0YM430F CXA1820-0000-
000N00Q227H CXA1820-0000-000N0UP20E3 CXA1820-0000-000N00Q430F CXA1820-0000-000N0HQ250F
CXA1820-0000-000N0UP240H CXA1820-0000-000N0YM230F CXA1820-0000-000N00R450F CXA1820-0000-
000N00P227F CXA1820-0000-000N0UP250F CXA1820-0000-000N0HQ440F CXA1820-0000-000N0HR20E3
CXA1820-0000-000N0HP440F CXA1820-0000-000N00Q230H CXA1820-0000-000N0UN40E3 CXA1820-0000-
000N00R450H CXA1820-0000-000N0YM427H CXA1820-0000-000N00Q235H CXA1820-0000-000N0UN240H
CXA1820-0000-000N00R240F CXA1820-0000-000N0YM230H CXA1820-0000-000N0UP450F CXA1820-0000-
000N0HQ20E5 CXA1820-0000-000N0YM435H CXA1820-0000-000N0YN235F CXA1820-0000-000N00R40E3
CXA1820-0000-000N0UN240F CXA1820-0000-000N00Q440H CXA1820-0000-000N00P430H CXA1820-0000-
000N0UP450H CXA1820-0000-000N0HQ440H CXA1820-0000-000N00Q40E3 CXA1820-0000-000N0YN435H
CXA1820-0000-000N0HQ40E5 CXA1820-0000-000N00R240H CXA1820-0000-000N0HR250H CXA1820-0000-
000N00Q435H CXA1820-0000-000N0HQ40E3 CXA1820-0000-000N00Q435F CXA1820-0000-000N0YN435F
CXA1820-0000-000N00Q227F CXA1820-0000-000N0YM227H CXA1820-0000-000N0HP440H CXA1820-0000-
000N00Q450H CXA1820-0000-000N0UN450H CXA1820-0000-000N0YK427F CXA1820-0000-000N0HQ240H
CXA1820-0000-000N00Q40E5 CXA1820-0000-000N0UN440H CXA1820-0000-000N00P427H CXA1820-0000-
000N00P435H CXA1820-0000-000N0HQ450H CXA1820-0000-000N0YK427H CXA1820-0000-000N0HQ40E1
CXA1820-0000-000N00Q40E1 CXA1820-0000-000N00R40E2 CXA1820-0000-000N00R257F CXA1820-0000-
000N0YN430H CXA1820-0000-000N0HQ465F CXA1820-0000-000N00Q427H CXA1820-0000-000N00R20E1
CXA1820-0000-000N0YP235F CXA1820-0000-000N0UP40E5