setoN2152RC0102RC6021RC5001RC5080RC3050RClaicremmoC
Power rating at 70°C watts 0.063 0.125 0.125 0.25 0.5 1.0
Resistance range ohms 1R to 10M 1R to 100M 1R to 1M
Limiting element voltage volts 50 100 150 200 400 500
TCR -55° to +155°C ppm/°C <10 ohms 350: 10 to 100 ohms 200:
100 to 1M ohm 100: >1M ohm 250
5 ,2 ,1 ,5.0 ,52.0 ,1.0%ecnarelot ecnatsiseR
See table of value ranges
551 ot 55-C°egnar erutarepmet tneibmA
6021RC5080RC400-10404 CCEC devorppA
Power rating at 70°C watts 0.125 0.25
M01 ot R1smhoegnar ecnatsiseR
Limiting element voltage volts 100 200
TCR -55°C to +125°C ppm/°C <10 ohms 200: 10 to 1M 100: >1M 200
TCR +20°C to +70°C ppm/°C <10 ohms 200: 10 to 1M 50: >1M 100
5 ,2 ,1 ,5.0%ecnarelot ecnatsiseR
See table of value ranges
521+ ot 55-C°egnar erutarepmet tneibmA
Surface Mounted
Resistors
CR Series
•CECC released products
•100% high temperature and overload screened
versions available for high reliability applications
•Terminations available for wire bonding or soldering
•Available in sizes down to 0503
•Resistance range 1 ohm to100M ohms
•Tolerances down to 0.1%
•Solder terminations have a nickel barrier layer
•Shorting Links available
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Electrical Data
02 . 08
A subsidiary of
TT electronics plc
Welwyn Components
2152RC0102RC6021RC5080RC800-10404 CCEC devorppA
Power rating at 70°C watts 0.125 0.25 0.5 1.0
Resistance range ohms 1R to 10M 1R to 10M 1R to 1M 1R to 1M
Limiting element voltage volts 100 200 400 500
TCR -55°C to +155°C ppm/°C <10 ohms 200: 10 to 1M ohms 100:
>1M ohms 250
5 ,2 ,1 ,5.0 ,52.0 ,1.0%ecnarelot ecnatsiseR
See table of value ranges
551 ot 55-C°egnar erutarepmet tneibmA
6021RC5080RC300-10404 CCEC devorppA
Power rating at 70°C watts 0.063 0.125
Resistance range ohms 1R to 3M 1R to 5M
Limiting element voltage volts 100 200
:053 smho 01 ot 5 :005 smho 5<C°/mppC°521+ ot C°55- RCT
10 to 3M ohms 100: >3M ohms 250
5 ,2 ,1 ,5.0 ,52.0%ecnarelot ecnatsiseR
See table of value ranges
521 ot 55-C°egnar erutarepmet tneibmA
17
derreferp 69E & 42EseulaV
Any value to order
Thermal impedance °C/watt 800 360 290 200 80 70
Mounted on custom
designed PCB’s
Dimensions of Standard Styles (mm) & Weight (g)
Wrap around
Style L W T max A B†C Wt
0503 1.25±0.2 0.63±.15 0.5 Not available 0.20±0.1 0.005
0805 2.0±0.2
1.25±0.15
0.6 0.3±0.15 0.9 min 0.3±0.1 0.009
1005 2.5±0.3 1.25±0.2 0.7 Not available 0.4±0.15 0.015
1206 3.2±0.2 1.6±0.2 0.7 0.4±0.2 1.7 min 0.4±0.15 0.020
2010 5.1±0.3 2.5±0.2 0.7 0.6±0.3 3.0 min N/A 0.036
2512 6.5±0.3 3.2±0.2 0.7 0.6±0.3 4.4 min N/A 0.055
Surface Mounted
Resistors
CR Series
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
CECC 40401-008 CECC40401-004 CECC40401-003
Actual
Requirements Requirements Requirements Maximum Typical
Load at rated power: 1000 hours at 70°C ∆R% 2 2 ≤3M3 2 2 0.25
>3M3 3
Shelf life: 12 months at room temp. ∆R% --- 0.1 0.02
Derating from rated power at 70°C Zero at 155°C Zero at 125°C Zero at 125°C
Overload ∆R% 0805:1 1206:0.5 0.5 2 1 0.1
Dry Heat: 1000 hours at UCT ∆R% 2 1 ≤3M3 2 to 10M 1 0.2
1 M01>2 M01>3 3M3>)800 rof C°551 - 400 & 300 rof C°521(
Long term damp heat ∆R% 2221 0.25
Temperature rapid change ∆R% 0.5 0.5 1 0.25 0.05
Resistance to solder heat ∆R% 0.5 0.5 2 0.25 0.05
001 : 3050003 : 6021 002 : 5080stlovfoorp egatloV
005 : srehto llA005 : 2152 004 : 0102
Physical Data
†This dimension determines the number of conductors which may pass under the surface mounted device.
02 . 08
Welwyn Components
Performance Data
Value Ranges (ohms)
T
W
A
A
B
L
Wrap-around terminations
(3 faces)
T
W
L
Planar terminations
C
C
Construction
Thick film resistor material, overglaze and organic protection
are screen printed on a 96% alumina substrate.
Terminations
Planar (or single-sided) termination is gold and suitable for
wire-bonding; wrap-around is suitable for soldering.
Solderability
Wrap-around terminations have an electroplated nickel barrier
and solder coating, this ensures excellent ‘leach’ resistance
properties and solderability. They will withstand immersion in
solder at 260°C for 30 seconds.
Marking
All relevant information recorded on the primary package or reel.
Tolerance %
1.052.05.0125eziS
0503 1 to 10M 1 to 10M 10 to 10M 100 to 1M N/A N/A
0805 1 to 100M 1 to 50M 1 to 20M 10 to 10M 100 to 1M 100 to 1M
1005 1 to 100M 1 to 50M 1 to 20M 10 to 10M 100 to 1M 100 to 1M
1206 1 to 100M 1 to 50M 1 to 25M 10 to 10M 100 to 1M 100 to 1M
2010 1 to 1M 1 to 1M 1 to 1M 10 to 10M 100 to 1M N/A
2512 1 to 1M 1 to 1M 1 to 1M 10 to 10M 100 to 1M N/A
Alternative styles for
surface mounting resistors
Note: An 0.01 ohm addition to be added to the performance of all resistors <10 ohms
Surface Mounted
Resistors
CR Series
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
02 . 08
Welwyn Components
19
Operating Temperature Range
The chips themselves can operate at a maximum temperature
of 155°C (see performance claims above). For soldered chips,
the joint temperature should not exceed 110°C. This
condition is met when the stated power levels at 70°C are
used.
Mounting
This chip resistor is ideally suited for handling by automatic
methods due to its rectangular shape and the small
dimensional tolerances. Electrical connection to a ceramic
substrate or to a printed circuit board can be made by wire
bonding (eg suffix ‘G’ in CR0805G) or by reflow soldering of
wrap-around terminations (eg suffix ‘F’ in CR0805F).
The ‘F’ terminations provide good leach properties and ensure
reliable contact. Due to the robust construction the resistor
chip can be immersed in the solder bath for 30 seconds at
260°C. This enables the resistor to be mounted on one side
of a printed circuit board and other wire-leaded components
on the other side.
Packaging
Wrap-around Termination
Chip resistors are supplied taped and reeled on standard
8mm tape to IEC 286-3.
Quantity per reel; 3000 max.
Planar Terminations
Resistor chips are supplied in waffle packs.
Application Notes
Ordering Procedure
Example: CR2512 with solderable wraparound terminations at 10 kilohms and 1% tolerance
on a reel of up to 1800 pieces -
C R 2 5 1 2 F – 1 0 K F I
Type
Termination
F
Solderable wraparound
0805, 1206, 2010, 2512 only
G
Gold pad planar
All sizes
Value (use IEC62 code)
Tolerance (use IEC62 code)
Packing
I
Tape
0805F, 1206F, 2010F
Standard
2512F
Waffle
G Termination
For CECC released product state on order the CECC number. Example: CR2512F-10KFI CECC40401-008
For SnPb finish instead of Pb-free replace the packing suffix with PB. Example: CR2512F-10KFPB
B
0.1%
D
0.5%
G
2%
C
0.25%
F
1%
J
5%