©2008 Littelfuse, Inc. Revised: October 24, 2008
POLYFUSE® Resettable PTCs
1812L Series
Surface Mount > 1812L Series
1812L Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
1812L Series
The 1812L Series device provides surface mount
overcurrent protection for applications where resettable
protection is desired.
Electrical Characteristics
Part Number* Marking I hold
(A)
I trip
(A)
V max
(Vdc)
I max
(A)
P d
max.
(W)
Maximum Time
To Trip Resistance Agency
Approvals
Current
(A)
Time
(Sec.)
R min
(Ω)
R typ
(Ω)
R 1max
(Ω)
1812L010 LF010 0.10 0.30 30 100 0.8 0.50 1.50 1.600 7.000 15.000 XX
1812L014 LF014 0.14 0.34 60 10 0.8 1.50 0.15 1.500 4.000 6.000 XX
1812L020 LF020 0.20 0.40 30 100 0.8 8.00 0.02 0.800 2.900 5.000 XX
1812L050–C LF050 0.50 1.00 15 100 0.8 8.00 0.15 0.150 0.600 1.000 XX
1812L075–C LF075 0.75 1.50 13.2 100 0.8 8.00 0.20 0.100 0.260 0.450 XX
1812L075/24 LF075-24 0.75 1.50 24 100 0.8 8.00 0.20 0.110 0.200 0.290 XX
1812L075/33 LF075-33 0.75 1.50 33 20 0.8 8.00 0.20 0.110 0.260 0.400 XX
1812L110–C LF110 1.10 2.20 6 100 0.8 8.00 0.30 0.040 0.120 0.210 XX
1812L110/16 LF110-16 1.10 1.95 16 100 0.8 8.00 0.50 0.060 0.120 0.180 XX
1812L110/33 LF110-33 1.10 1.95 33 20 0.8 8.00 0.50 0.060 0.120 0.200 XX
1812L125–C LF125 1.25 2.50 15 100 0.8 8.00 0.40 0.050 0.160 0.250 XX
1812L125/6 LF125-6 1.25 2.50 6 100 0.8 8.00 0.40 0.050 0.090 0.140 XX
1812L150–C LF150 1.50 3.00 8 100 0.8 8.00 0.30 0.040 0.070 0.110 XX
1812L150/12 LF150-12 1.50 3.00 12 100 0.8 8.00 0.50 0.040 0.070 0.110 XX
1812L150/24 LF150-24 1.50 3.00 24 20 0.8 8.00 1.50 0.040 0.070 0.120 XX
1812L160–C LF160 1.60 2.80 8 100 0.8 8.00 1.00 0.030 0.066 0.100 XX
1812L160/12 LF160-12 1.60 2.80 12 100 0.8 8.00 1.00 0.030 0.066 0.100 XX
1812L200–C LF200 2.00 3.50 8 100 0.8 8.00 2.00 0.020 0.040 0.060 XX
1812L260–C LF260 2.60 5.00 6 100 0.8 8.00 2.50 0.015 0.030 0.047 XX
Description
Applications
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for motherboards and
peripherals
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protection
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
R50119118
Features
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lead-free
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currents
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board space
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t-PXQSPmMF
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temperature solders
I hold = Hold current: maximum current device will pass without tripping in 20°C still air.
I trip = Trip current: minimum current at which the device will trip in 20°C still air.
V max = Maximum voltage device can withstand without damage at rated current (I max)
I max = Maximum fault current device can withstand without damage at rated voltage (Vmax)
P d = Power dissipated from device when in the tripped state at 20°C still air.
R min = Minimum resistance of device in initial (un-soldered) state.
R typ = Typical resistance of device in initial (un-soldered) state.
R 1max = Maximum resistance of device at 20°C measured one hour after tripping or reflow
soldering of 260°C for 20 sec.
Caution: Operation beyond the specified rating may result in damage and possible arcing and flame.
*Note: Some devices in this product series may have “–C“ in the Part Number. The “–C“ should be omitted when placing orders for the device.
Revised: October 24, 2008 ©2008 Littelfuse, Inc.
POLYFUSE® Resettable PTCs
Surface Mount > 1812L Series
1812L Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
Ambient Operation Temperature
-40°C -20°C 0°C 23°C 40°C 50°C 60°C 70°C 85°C
Part Number* Hold Current (A)
1812L010 0.16 0.14 0.12 0.10 0.08 0.07 0.06 0.05 0.03
1812L014 0.23 0.19 0.17 0.14 0.12 0.10 0.09 0.08 0.06
1812L020 0.29 0.26 0.23 0.20 0.17 0.15 0.14 0.12 0.10
1812L050–C 0.77 0.68 0.59 0.50 0.44 0.40 0.37 0.33 0.29
1812L075–C 1.15 1.01 0.88 0.75 0.65 0.60 0.55 0.49 0.43
1812L075/24 1.06 0.95 0.84 0.75 0.60 0.55 0.50 0.45 0.37
1812L075/33 1.10 1.00 0.88 0.75 0.66 0.60 0.56 0.47 0.36
1812L110–C 1.59 1.43 1.26 1.10 0.95 0.87 0.80 0.71 0.60
1812L110/16 1.58 1.43 1.27 1.10 0.95 0.85 0.77 0.71 0.58
1812L110/33 1.55 1.40 1.25 1.10 0.93 0.83 0.73 0.63 0.50
1812L125–C 2.00 1.75 1.52 1.25 1.00 0.95 0.90 0.75 0.53
1812L125/6 2.00 1.75 1.52 1.25 1.00 0.95 0.90 0.75 0.53
1812L150–C 2.06 1.93 1.79 1.50 1.28 1.10 1.02 0.80 0.68
1812L150/12 2.04 1.88 1.68 1.50 1.25 1.10 1.00 0.80 0.60
1812L150/24 2.05 1.87 1.67 1.50 1.25 1.08 0.95 0.77 0.60
1812L160–C 2.20 2.06 1.91 1.60 1.36 1.17 1.09 0.85 0.72
1812L160/12 2.18 2.01 1.79 1.60 1.34 1.16 1.07 0.83 0.60
1812L200–C 3.08 2.71 2.35 2.00 1.80 1.60 1.50 1.07 0.80
1812L260–C 4.00 3.52 3.06 2.60 2.34 2.08 1.95 1.39 1.04
Temperature Rerating
Temperature Rerating Curve
-40 -30 -20 -10 0 10 20 30 40 5060708085
10%
30%
50%
70%
90%
110 %
130%
150%
170%
Temperature (°C)
Percentage of Rated Current
Average Time Current Curves
The average time current curves and Temperature Rerating curve performance is affected
by a number or variables, and these curves provided as guidance only. Customer must
verify the performance in their application.
0.01
0.1
1
10
100
1000
10000
100000
0.1 1 10 100
Current in Amperes
Time in Seconds
1812L
0.10A
0.14A
0.20A
0.50A
0.75A/33V
0.75A/24V
0.75A
1.10A/16V
1.10A/33V
1.10A
1.25A
1.25A/6V
1.50A/12V
1.50A
1.50A/24V
1.60A/12V
1.60A
1.60A/8V
2.00A
2.60A
*Note: Some devices in this product series may have “–C“ in the Part Number. The “–C“ should be omitted when placing orders for the device.
©2008 Littelfuse, Inc. Revised: October 24, 2008
POLYFUSE® Resettable PTCs
1812L Series
Surface Mount > 1812L Series
1812L Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
Environmental Specifications
Soldering Parameters
Condition Reflow
Peak Temp/ Duration Time 260°C / 10 Sec
Time above liquids (TAL) 220°C 60 Sec ~ 100 Sec
Preheat 120°C~ 180°C 50 Sec ~ 150 Sec
Storage Condition 0°C~35°C, <
=70%RH
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oven, N2 environment for lead–free
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solvents.
Note: If reflow temperatures exceed the recommended profile,
devices may not meet the performance requirements.
Operating/Storage
Temperature -40°C to +85°C
Maximum Device Surface
Temperature in Tripped State 125°C
Passive Aging +85°C, 1000 hours
-/+5% typical resistance change
Humidity Aging +85°C, 85% R.H.,1000 hours
-/+5% typical resistance change
Thermal Shock
MIL–STD–202, Method 107G
+85°C/-40°C 20 times
-30% typical resistance change
Solvent Resistance MIL–STD–202, Method 215
No change
Vibration
MIL–STD–883C, Method 2007.1,
Condition A
No change
Moisture Level Sesitivity Level 2, J–STD–020C
Physical Specifications
Terminal Material Solder-Plated Copper (Solder Material:
Matte Tin (Sn))
Lead Solderability Meets EIA Specification RS186-9E, ANSI/
J-STD-002 Category 3.
Preheating
120
180
220
260
060 to 100
Temperature (°C)
Soldering Cooling
120
50 to 150
Time(s)
Revised: October 24, 2008 ©2008 Littelfuse, Inc.
POLYFUSE® Resettable PTCs
Surface Mount > 1812L Series
1812L Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
Part
Number*
ABCDE
Inches mm Inches mm Inches mm Inches mm Inches mm
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Min. Min Max. Min. Max.
1812L010 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.25 0.01 0.30 0.01 0.03 0.25 0.65
1812L014 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.08 0.75 1.95 0.01 0.30 0.01 0.03 0.25 0.65
1812L020 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.04 0.55 1 0.01 0.30 0.01 0.03 0.25 0.65
1812L050–C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.5 0.75 0.01 0.30 0.01 0.02 0.25 0.5
1812L075–C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.5 0.75 0.01 0.30 0.01 0.02 0.25 0.5
1812L075/24 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.06 0.75 1.55 0.01 0.30 0.01 0.03 0.25 0.65
1812L075/33 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.06 0.75 1.55 0.01 0.30 0.01 0.03 0.25 0.65
1812L110–C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.5 0.71 0.01 0.30 0.01 0.02 0.25 0.5
1812L110/16 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.25 0.01 0.30 0.01 0.03 0.25 0.65
1812L110/33 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.05 0.08 1.2 2 0.01 0.30 0.01 0.03 0.25 0.65
1812L125–C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.25 0.01 0.30 0.01 0.02 0.25 0.5
1812L125/6 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.45 0.75 0.01 0.30 0.01 0.03 0.25 0.65
1812L150–C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.4 0.71 0.01 0.30 0.01 0.03 0.25 0.65
1812L150/12 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.25 0.01 0.30 0.01 0.03 0.25 0.65
1812L150/24 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.07 0.8 1.8 0.01 0.30 0.01 0.03 0.25 0.65
1812L160–C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.4 0.75 0.01 0.30 0.01 0.03 0.25 0.65
1812L160/12 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.25 0.01 0.30 0.01 0.03 0.25 0.65
1812L200–C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.81 1.2 0.01 0.30 0.01 0.02 0.25 0.5
1812L260–C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.8 1.34 0.01 0.30 0.01 0.02 0.25 0.5
Dimensions
C
Top
View
Pad
Layout
Side
View
Bottom
View
3.15 mm
(.124”)
3.45 mm
(.135”)
1.78mm
(.070”)
D
MARKING CODE VARIES
WITH AMPERAGE AND VOLTAGE RATING
(See Electrical Characteristics Table)
SHOWN ARE:
- 1.1A/6V RATING (LEFT)
- 1.1A/33V RATING (RIGHT)
E
A
B
110
110
110
-33
*Note: Some devices in this product series may have “–C“ in the Part Number. The “–C“ should be omitted when placing orders for the device.
©2008 Littelfuse, Inc. Revised: October 24, 2008
POLYFUSE® Resettable PTCs
1812L Series
Surface Mount > 1812L Series
1812L Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
Packaging
Part Ordering Number System*
PACKAGING STYLE
SIZE
L: LITTELFUSE SURFACE MOUNT PPTC
I
HOLD
HOLD CURRENT CODE
(Refer to Electrical Characteristics Table)
/XX: SPECIAL VOLTAGE RATING
(Not applicable to all parts. Refer to
Electrical Characteristics Table)
QUANTITY CODE: D=1500 M=1000 P=2000
R: Tape & Reel
SERIES
1812 L 075 /33 D R
Part Number* Ordering Number* I hold (A) I hold Code Voltage
Option
Packaging
Option Quantity Quantity &
Packaging Codes
1812L010 1812L010DR 0.10 010 Tape and Reel 1500 DR
1812L014 1812L014DR 0.14 014 Tape and Reel 1500 DR
1812L020 1812L020PR 0.20 020 Tape and Reel 2000 PR
1812L050-C 1812L050PR 0.50 050 Tape and Reel 2000 PR
1812L075-C 1812L075PR 0.75 075 Tape and Reel 2000 PR
1812L75/24 1812L75/24DR 0.75 075 /24 Tape and Reel 1500 DR
1812L75/33 1812L75/33DR 0.75 075 /33 Tape and Reel 1500 DR
1812L110-C 1812L110PR 1.10 110 Tape and Reel 2000 PR
1812L110/16 1812L110/16DR 1.10 110 /16 Tape and Reel 1500 DR
1812L110/33 1812L110/33MR 1.10 110 /33 Tape and Reel 1000 MR
1812L125-C 1812L125DR 1.25 125 Tape and Reel 1500 DR
1812L125/6 1812L125/6PR 1.25 125 /6 Tape and Reel 2000 PR
1812L150-C 1812L150ZR 1.50 150 Tape and Reel 2000 ZR
1812L150/12 1812L150/12DR 1.50 150 /12 Tape and Reel 1500 DR
1812L150/24 1812L150/24MR 1.50 150 /24 Tape and Reel 1000 MR
1812L160-C 1812L160PR 1.60 160 Tape and Reel 2000 PR
1812L160/12 1812L160/12DR 1.60 160 /12 Tape and Reel 1500 DR
1812L200-C 1812L200DR 2.00 200 Tape and Reel 1500 DR
1812L260-C 1812L260ZR 2.60 260 Tape and Reel 1000 ZR
*Note: Some devices in this product series may have “–C“ in the Part Number. The “–C“ should be omitted when placing orders for the device.
Revised: October 24, 2008 ©2008 Littelfuse, Inc.
POLYFUSE® Resettable PTCs
Surface Mount > 1812L Series
1812L Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
TAPE SPECIFICATIONS: EIA-481-1 (mm)
REEL DIMENSIONS:
EIA-481-1 (mm)
1812L020,
1812L050–C,
1812L075–C,
1812L110–C,
1812L125/6,
1812L150–C,
1812L160–C
1812L010,
1812L014,
1812L075/24,
1812L075/33
1812L110/16,
1812L125–C,
1812L150/12,
1812L160/12
1812L200–C
1812L110/33,
1812L150/24,
1812L260–C
W12.00+0.30-0.10 12.00+/- 0.30 12.00+/- 0.30 H16.0+/- 0.2
F5.50+/- 0.05 5.50+/- 0.05 5.50+/- 0.05 W13.2+/- 1.5
E11.75+/- 0.10 1.75+/- 0.10 1.75+/- 0.10 DØ 60.2+/- 0.5
D01.50+0.10 1.55+/- 0.05 1.55+/- 0.05 FØ13.0+/- 0.5
D11.50+0.25 1.50 (MIN) 1.50 (MIN) CØ178+/- 1.0
P04.00+/- 0.10 4.00+/- 0.10 4.00+/- 0.10 H111+/- 0.5
P18.00+/- 0.10 8.00+/- 0.10 8.00+/- 0.10 W12.5+0.5
P22.00+/- 0.05 2.00+/- 0.05 2.00+/- 0.05 W23.0+0.5
A03.58+/- 0.10 3.58+/- 0.10 3.58+/- 0.10 W34.0+0.5
B04.93+/- 0.10 4.93+/- 0.10 4.93+/- 0.10 W45.0+0.5
T0.25+/- 0.10 0.25+/- 0.10 0.25+/- 0.10
K01.02+/- 0.10 1.30+/- 0.10 2.10+/- 0.10
Leader min. 390 390 390
Trailer min. 160 160 160
Tape and Reel Specifications
W
4
W
2
W
3
W
1
F
H1
W
C
D
H
D2
K0B0
A0
T
F
W
E1
P2
D0
P0
P1
Tape and Reel Diagram