POLY-FUSE® Resettable PTCs
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/25/19
Surface Mount > 1812L Series
The 1812L Series PTC 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 typ.
(W)
Max. Time To Trip Resistance Agency Approvals
Current
(A)
Time
(Sec.)
R min
(Ω)
R 1max
(Ω)
1812L010 LF010 0.10 0.30 30 100 0.8 0.50 1.50 1.600 15.000 X X
1812L010/60 LF010-60 0.10 0.30 60 10 0.8 0.50 1.50 1.600 15.000 X X
1812L014 LF014 0.14 0.34 60 10 0.8 1.50 0.15 1.500 6.000 X X
1812L020 LF020 0.20 0.40 30 100 0.8 8.00 0.02 0.800 5.000 X X
1812L020/60 LF020-60 0.20 0.40 60 40 0.8 1. 0 0 2.00 1.400 4.400 X X
1812L035/30 LF035-30 0.35 0.75 30 40 0.8 8.00 0.15 0.400 1.700 X X
1812L035/60 LF035-60 0.35 0.70 60 10 1. 0 0 8.00 0.15 0.400 1.700 X X
1812L050 1LF050 0.50 1. 0 0 15 100 0.8 8.00 0.15 0.150 1.000 X X
1812L050/30 LF050-30 0.50 1. 0 0 30 100 0.8 8.00 0.15 0.150 1.000 X X
1812L050/60 LF050-60 0.50 1. 0 0 60 10 1.50 8.00 0.15 0.150 1.000 X X
1812L075 1LF075 0.75 1.50 13.2 100 0.8 8.00 0.20 0.100 0.450 X X
1812L075/242LF075-24 0.75 1.50 24 100 0.8 8.00 0.20 0.110 0.290 X X
1812L075/33 LF075-33 0.75 1.50 33 20 0.8 8.00 0.20 0.110 0.400 X X
1812L110 1LF110 1. 10 2.20 8 100 0.8 8.00 0.30 0.040 0.210 X X
1812L110/16 LF110-16 1. 10 1.95 16 100 0.8 8.00 0.30 0.060 0.180 X X
1812L110/24 LF110-24 1.10 1.95 24 20 0.8 8.00 0.50 0.060 0.200 X X
1812L110/33 LF110-33 1.10 1.95 33 20 0.8 8.00 0.50 0.060 0.200 X X
1812L125/6 LF125-6 1.25 2.50 6 100 0.8 8.00 0.40 0.050 0.140 X X
1812L125/16 LF125 1.25 2.50 16 100 0.8 8.00 0.40 0.050 0.140 X X
1812L150 1LF150 1.50 3.00 8 100 0.8 8.00 0.30 0.040 0.110 X X
1812L150/12 LF150-12 1.50 3.00 12 100 0.8 8.00 0.50 0.040 0.110 X X
1812L150/16 LF150-16 1.50 2.80 16 100 0.8 8.00 0.50 0.040 0.110 X X
1812L150/242LF150-24 1.50 3.00 24 20 0.8 8.00 1.50 0.040 0.120 X X
1812L160 1LF160 1.60 2.80 8 100 0.8 8.00 1. 0 0 0.030 0.100 X X
1812L160/12 LF160-12 1.60 2.80 12 100 0.8 8.00 1. 0 0 0.030 0.100 X X
1812L200TH 1LF200 2.00 3.50 8 100 0.8 8.00 2.00 0.020 0.070 X X
Description
Applications
• Plug and play protection
for motherboards and
peripherals
• USB peripherals
• PCI cards
• Game console port
protection
Agency Approvals
Features
• RoHS compliant, lead-free
and halogen-free
• Fast response
• Compact design
• Low resistance
• Low-profile
• Compatible with high
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.
1 Some older references to these devices may include “–C“ in the Part Number. The “–C“ should be omitted when placing new orders for the device.
2 Part Number with note 2 tested and complied with AEC Q200.
continues on next page.
1812L Series RoHS
AGENCY AGENCY FILE NUMBER
E183209
R50119118
POLY-FUSE® Resettable PTCs
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/25/19
Surface Mount > 1812L Series
Ambient Operation Temperature
-40°C -20°C 0°C 20°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
1812L010/60 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
1812L020/60 0.29 0.26 0.23 0.20 0.17 0.15 0.14 0.12 0.10
1812L035/30 0.50 0.45 0.40 0.35 0.30 0.26 0.24 0.20 0.16
1812L035/60 0.50 0.46 0.40 0.35 0.30 0.26 0.24 0.20 0.16
1812L050 0.77 0.68 0.59 0.50 0.44 0.40 0.37 0.33 0.29
1812L050/30 0.77 0.68 0.59 0.50 0.44 0.40 0.37 0.33 0.29
1812L050/60 0.77 0.68 0.59 0.50 0.44 0.40 0.37 0.33 0.29
1812L075 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. 0 0 0.88 0.75 0.66 0.60 0.56 0.47 0.36
1812L110 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
1812L110/24 1.55 1.40 1.25 1.10 0.93 0.83 0.73 0.63 0.50
1812L110/33 1.55 1.40 1.25 1.10 0.93 0.83 0.73 0.63 0.50
1812L125/6 2.00 1.75 1.52 1.25 1. 0 0 0.95 0.90 0.75 0.53
1812L125/16 2.00 1.75 1.52 1.25 1. 0 0 0.95 0.90 0.75 0.53
1812L150 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. 0 0 0.80 0.60
1812L150/16 2.04 1.88 1.68 1.50 1.25 1. 10 1. 0 0 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 2.20 2.06 1.91 1.60 1.36 1. 17 1.09 0.85 0.72
1812L160/12 2.20 2.06 1.91 1.60 1.36 1.17 1.09 0.85 0.72
1812L200TH 2.60 2.44 2.22 2.00 1,78 1.67 1.50 1.45 1.29
1812L200/12 2.60 2.44 2.22 2.00 1.78 1.67 1.50 1.45 1.29
1812L200/16 2.60 2.44 2.22 2.00 1.78 1.67 1.50 1.45 1.29
1812L260TH 3.40 3.16 3.00 2.60 2.30 2.15 2.00 1.85 1.63
1812L260/12 3.40 3.16 3.00 2.60 2.30 2.15 2.00 1.85 1.63
1812L260/16 3.40 3.16 3.30 2.60 2.30 2.15 2.00 1.85 1.63
1812L300 4.13 3.75 3.30 3.00 2.62 2.43 2.25 2.00 1.78
Temperature Rerating
Notes: The temperature rerating data is only for reference, please contact Littelfuse technical support for detail temperature rerating information.
Electrical Characteristics
Part Number Marking I hold
(A)
I trip
(A)
V max
(Vdc)
I max
(A)
P d
typ.
(W)
Max. Time To Trip Resistance Agency Approvals
Current
(A)
Time
(Sec.)
R min
(Ω)
R 1max
(Ω)
1812L200/12 LF200-12 2.00 3.50 12 100 1. 0 8.00 2.00 0.020 0.070 X X
1812L200/16 LF200-16 2.00 3.50 16 100 1. 0 8.00 2.00 0.020 0.070 X X
1812L260TH 1LF260 2.60 5.20 8 100 0.8 8.00 2.50 0.015 0.047 X X
1812L260/12 LF260-12 2.60 5.00 12 100 0.8 8.00 5.00 0.015 0.055 X X
1812L260/16 LF260-16 2.60 5.00 16 100 1.2 8.00 5.00 0.015 0.050 X X
1812L300 LF300 3.00 5.00 6 100 0.8 8.00 4.00 0.012 0.040 X X
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.
1 Some older references to these devices may include “–C“ in the Part Number. The “–C“ should be omitted when placing new orders for the device.
2 Part Number with note 2 tested and complied with AEC Q200.
POLY-FUSE® Resettable PTCs
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/25/19
Surface Mount > 1812L Series
Note:
Typical Temperature rerating curve, refer to table for derating data
Temperature Rerating Curve
-40 -30 -20 -10010 20 30 40 50 60 70 80 85
10%
30%
50%
70%
90%
110%
130%
150%
170%
Temperature (°C)
Percentage of Rated Current
Environmental Specifications
Operating/Storage Temp. -40°C to +85°C
Max. Device Surface Temp.
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 107
+85°C/-40°C 20 times
-30% typical resistance change
Solvent Resistance MIL–STD–202, Method 215,
No change
Vibration MIL–STD–883, Method 2007,
Condition A, No change
Moisture Level Sesitivity Level 1, J–STD–020
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.
Soldering Parameters
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
Preheat
P
reheat
Ramp-up
R
amp-up
Ramp-down
R
amp-d
o
Critical Zone
tL to tP
Profile Feature Pb-Free Assembly
Average Ramp-Up Rate (TS(max) to TP) 3°C/second max
Pre Heat:
Temperature Min (Ts(min))150°C
Temperature Max (Ts(max))200°C
Time (Min to Max) (ts)60 – 180 secs
Time Maintained
Above:
Temperature (TL)217°C
Temperature (tL)60 – 150 seconds
Peak / Classification Temperature (TP) 260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (TP) 8 minutes Max.
-- All temperature refer to topside of the package, measured on the package body surface
-- If reflow temperature exceeds the recommended profile, devices may not meet the
performance requirements
-- Recommended reflow methods: IR, vapor phase oven, hot air oven, N2 environment
for lead
-- Recommended maximum paste thickness is 0.25mm (0.010 inch)
-- Devices can be cleaned using standard industry methods and solvents
-- Devices can be reworked using the standard industry practices
POLY-FUSE® Resettable PTCs
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/25/19
Surface Mount > 1812L Series
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.
1812L
0.01
0.1
1
10
100
0.1 1 10 100
Current in Amperes
Time in Seconds
1812L
0.01
0.1
10
100
0.1 1 10 100
Current in Amperes
Time in Seconds
0.50A
0.75A
1.10A/16V
1.25A/16V
1.50A/12V
1.10A
1.25A/6V
1.50A
1.60A
2.00A
2.60A, 2.60A/12V
2.60A/16V
3.00A
0.10
0.10/60
0.14
0.20/60
0.20
0.35/30
0.50/30
0.75/33
0.75/24
1.10/33
1.10/24
1.50/24
2.00/12
0.35/60
0.50/60
1812L
0.01
0.1
1
10
100
0.1 1 10 100
Current in Amperes
Time in Seconds
1812L
0.01
0.1
10
100
0.1 1 10 100
Current in Amperes
Time in Seconds
0.50A
0.75A
1.10A/16V
1.25A/16V
1.50A/12V
1.10A
1.25A/6V
1.50A
1.60A
2.00A
2.60A, 2.60A/12V
2.60A/16V
3.00A
0.10
0.10/60
0.14
0.20/60
0.20
0.35/30
0.50/30
0.75/33
0.75/24
1.10/33
1.10/24
1.50/24
2.00/12
0.35/60
0.50/60
Additional Information
Datasheet Samples
Resources Samples
POLY-FUSE® Resettable PTCs
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/25/19
Surface Mount > 1812L Series
Part
Number
AB C D E
Inches mm Inches mm Inches mm Inches mm Inches mm
Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max 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 0.05 0.3 1.2 0.01 0.03 0.15 0.65
1812L010/60 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 0.05 0.3 1.2 0.01 0.03 0.15 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 0.05 0.3 1.2 0.01 0.03 0.15 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 0 0.01 0.05 0.3 1.2 0.01 0.03 0.15 0.65
1812L020/60 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 0.05 0.3 1.20 0.01 0.03 0.15 0.65
1812L035/30 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.04 0.6 1.25 0.01 0.05 0.3 1.20 0.01 0.03 0.15 0.65
1812L035/60 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.05 0.07 1.2 1. 8 0.01 0.05 0.3 1.2 0.01 0.03 0.15 0.65
1812L050 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 0.05 0.3 1. 2 0.01 0.02 0.15 0.50
1812L050/30 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.04 0.5 1. 0 0 0.01 0.05 0.3 1.2 0.01 0.03 0.15 0.65
1812L050/60 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.05 0.07 1.2 1. 8 0.01 0.05 0.3 1.2 0.01 0.03 0.15 0.65
1812L075 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 0.05 0.3 1. 2 0.01 0.02 0.15 0.50
1812L075/24 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.20 0.01 0.05 0.3 1.2 0.01 0.03 0.15 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 0.05 0.3 1.2 0.01 0.03 0.15 0.65
1812L110 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.50 0.71 0.01 0.05 0.3 1.2 0.01 0.02 0.15 0.65
1812L110/24 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.04 0.50 1.07 0.01 0.05 0.3 1. 2 0.01 0.03 0.15 0.65
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 0.05 0.3 1.2 0.01 0.03 0.15 0.65
1812L110/33 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.05 0.08 1.20 2.00 0.01 0.05 0.3 1. 2 0.01 0.03 0.15 0.65
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 0.05 0.3 1. 2 0.01 0.03 0.15 0.65
1812L125/16 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 0.05 0.3 1. 2 0.01 0.02 0.15 0.65
1812L150 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.30 0.71 0.01 0.05 0.3 1.2 0.01 0.03 0.15 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 0.05 0.3 1. 2 0.01 0.03 0.15 0.65
1812L150/16 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 0.05 0.3 1. 2 0.01 0.03 0.15 0.65
1812L150/24 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.07 0.80 1. 8 0.01 0.05 0.3 1. 2 0.01 0.03 0.15 0.65
1812L160 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.40 0.75 0.01 0.05 0.3 1.2 0.01 0.03 0.15 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 0.05 0.3 1. 2 1. 2 0.01 0.15 0.65
1812L200TH 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.008 0.024 0.20 0.6 0.01 0.05 0.3 1.2 0.01 0.02 0.15 0.65
1812L200/12 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.80 1.20 0.012 0.047 0.3 1.2 0.01 0.026 0.15 0.65
1812L200/16 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.80 1.20 0.012 0.047 0.3 1.2 0.01 0.026 0.15 0.65
1812L260TH 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.04 0.50 1. 0 0 0.01 0.05 0.3 1.2 0.01 0.02 0.15 0.65
1812L260/12 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.80 1.34 0.01 0.05 0.3 1.2 0.01 0.03 0.15 0.65
1812L260/16 0.18 0.19 4.54 4.90 0.12 0.14 3.16 3.50 0.05 0.08 1.20 2.00 0.012 0.047 0.3 1. 2 0.006 0.03 0.15 0.65
1812L300 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.06 0.50 1.50 0.01 0.05 0.3 1. 2 0.01 0.03 0.15 0.65
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
POLY-FUSE® Resettable PTCs
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/25/19
Surface Mount > 1812L Series
Packaging
Part Number Ordering Number Halogen Free I hold (A) I hold Code Voltage
Option
Packaging
Option Quantity Quantity &
Packaging Code
1812L010 1812L010DR Yes 0.10 010
Tape and Reel
1500 DR
1812L010/60 1812L010/60DR Yes 0.10 010 /60 1500 DR
1812L014 1812L014DR Yes 0.14 014 1500 DR
1812L020 1812L020PR Yes 0.20 020 2000 PR
1812L020/60 1812L020/60DR Yes 0.20 020 /60 1500 DR
1812L035/30 1812L035/30DR Yes 0.35 035 /30 1500 DR
1812L035/60 1812L035/60 Yes 0.35 035 /60 1000 MR
1812L050 1812L050PR Yes 0.50 050 2000 PR
1812L050/30 1812L050/30PR Yes 0.50 050 /30 2000 PR
1812L050/60 1812L050/60 Yes 0.50 050 /60 1000 MR
1812L075 1812L075PR Yes 0.75 075 2000 PR
1812L75/24 1812L075/24DR Yes 0.75 075 /24 1500 DR
1812L75/33 1812L075/33DR Yes 0.75 075 /33 1500 DR
1812L110 1812L110PR Yes 1.10 110 2000 PR
1812L110/16 1812L110/16DR Yes 1. 10 110 /16 1500 DR
1812L110/24 1812L110/24DR Yes 1. 10 1.10 /24 1500 DR
1812L110/33 1812L110/33MR Yes 1. 10 110 /33 1000 MR
1812L125/6 1812L125/6PR Yes 1.25 125 /6 2000 PR
1812L125/16 1812L125/16DR Yes 1.25 125 /16 1500 DR
1812L150 1812L150ZR Yes 1.50 150 2000 ZR
1812L150/12 1812L150/12DR Yes 1.50 150 /12 1500 DR
1812L150/16 1812L150/16DR Yes 1.50 150 /16 1500 DR
1812L150/24 1812L150/24MR Yes 1.50 150 /24 1000 MR
1812L160 1812L160PR Ye s 1.60 160 2000 PR
1812L160/12 1812L160/12DR Yes 1.60 160 /12 1500 DR
1812L200TH 1812L200THPR Yes 2.00 200 2000 PR
1812L200/12 1812L200/12DR Yes 2.00 200 /12 1500 DR
1812L200/16 1812L200/16DR Yes 2.00 200 1500 DR
1812L260TH 1812L260THDR Yes 2.60 260 1500 DR
1812L260/12 1812L260/12MR Yes 2.60 260 /12 1000 MR
1812L260/16 1812L260/16MR Yes 2.60 260 1000 MR
1812L300 1812L300MR Yes 3.00 300 1000 MR
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: K=10,000 Y=4,000 W=3,000 P=2,000
R: Tape & Reel
SERIES
1812 L 380 /12 TH Y R
THIN PROFILE
(Not applicable to all parts)
-A: Automotive grade
Blank: Standard version
- A
WARNING
• Users shall independently assess the suitability of these devices for each of their applications
• Operation of these devices beyond the stated maximum ratings could result in damage to the devices and lead to electrical arcing and/or fire
• These devices are intended to protect against the effects of temporary over-current or over-temperature conditions and are not intended to perform as protective devices where such
conditions are expected to be repetitive or prolonged in duration
• Exposure to silicon-based oils, solvents, electrolytes, acids, and similar materials can adversely affect the performance of these PPTC devices
• These devices undergo thermal expansion under fault conditions, and thus shall be provided with adequate space and be protected against mechanical stresses
• Circuits with inductance may generate a voltage (L di/dt) above the rated voltage of the PPTC device.
POLY-FUSE® Resettable PTCs
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/25/19
Surface Mount > 1812L Series
Tape and Reel Specifications
TAPE SPECIFICATIONS: EIA-481-1 (mm)
REEL DIMENSIONS:
EIA-481-1 (mm)
1812L020
1812L050/30
1812L050
1812L075
1812L110
1812L125/6
1812L150
1812L160
1812L200
1812L010
1812L010/60
1812L014
1812L020/60
1812L035/30
1812L075/24
1812L075/33
1812L110/16
1812L110/24
1812L125/16
1812L150/12
1812L150/16
1812L160/12
1812L200/12
1812L200/16
1812L260
1812L035/60
1812L050/60
1812L110/33
1812L150/24
1812L260/12
1812L260/16
1812L300
W12.00 ± 0.30 12.00 ± 0.30 12.00 ± 0.30 CØ178 ± 1.0
F5.50 ± 0.05 5.50 ± 0.05 5.50 ± 0.05 DØ60.2 ± 0.5
E11.75 ± 0.10 1.75 ± 0.10 1.75 ± 0.10 H16.0 ± 0.5
D01.55 ± 0.10 1.55+/- 0.05 1.55 ± 0.05 W13.2 ± 1.5
D11.55 (min) 1.50+/- 0.10 1.50 (MIN)
P04.00 ± 0.10 4.00 ± 0.10 4.00 ± 0.08
P18.00 ± 0.10 8.00 ± 0.10 8.00 ± 0.10
P22.00 ± 0.05 2.00 ± 0.05 2.00 ± 0.05
A03.58 ± 0.10 3.50 ± 0.10 3.58 ± 0.10
B04.93 ± 0.10 4.85± 0.10 4.93 ± 0.10
T0.25 ± 0.10 0.25 ± 0.10 0.25 ± 0.10
K00.87± 0.06 1.25 ± 0.10 2.10 ± 0.10
Leader min. 390 390 390
Trailer min. 160 160 160
Tape and Reel Diagram
W
C
D
H
D1
K0B0
D1
T
F
W
E1
P2
D0
P0
P1
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the
suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used
in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
