POLY-FUSE
®
Resettable PTCs
Surface Mount > 1812L Series
1812L Series
Description
RoHS
The 1812L Series PTC provides surface mount overcurrent
protection for applications where resettable protection is
desired.
Features
• RoHS compliant, lead-free
and halogen-free
• Fast response
• Compact design
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50119118
• Low resistance
• Low-profile
• Compatible with high
temperature solders
Applications
• Plug and play protection
for motherboards and
peripherals
• USB peripherals
• PCI cards
• Game console port
protection
Electrical Characteristics
Part Number
1812L010
1812L010/60
1812L014
1812L020
1812L020/60
1812L035/30
1812L050
1
1812L050/30
1812L075
1
1812L075/24
1812L075/33
1812L110
1
1812L110/16
1812L110/24
1812L110/33
1812L125/6
1812L125
/16
1812L150
1
1812L150/12
1812L150/24
1812L160
1
1812L160/12
1812L200TH
1
Marking
LF010
LF010-60
LF014
LF020
LF020-60
LF035-30
LF050
LF050-30
LF075
LF075-24
LF075-33
LF110
LF110-16
LF110-24
LF110-33
LF125-6
LF125
LF150
LF150-12
LF150-24
LF160
LF160-12
LF200
I
hold
(A)
0.10
0.10
0.14
0.20
0.20
0.35
0.50
0.50
0.75
0.75
0.75
1.10
1.10
1.10
1.10
1.25
1.25
1.50
1.50
1.50
1.60
1.60
2.00
I
trip
(A)
0.30
0.30
0.34
0.40
0.40
0.75
1.00
1.00
1.50
1.50
1.50
2.20
1.95
1.95
1.95
2.50
2.50
3.00
3.00
3.00
2.80
2.80
3.50
V
max
(Vdc)
30
60
60
30
60
30
15
30
13.2
24
33
8
16
24
33
6
16
8
12
24
8
12
8
I
max
(A)
100
10
10
100
40
100
100
100
100
100
20
100
100
20
20
100
100
100
100
20
100
100
100
P
d
typ.
(W)
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
Max. Time To Trip
Current
(A)
Time
(Sec.)
Resistance
R
min
(Ω)
R
1max
(Ω)
Agency Approvals
0.50
0.50
1.50
8.00
1.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
1.50
1.50
0.15
0.02
2.00
0.15
0.15
0.15
0.20
0.20
0.20
0.30
0.30
0.50
0.50
0.40
0.40
0.30
0.50
1.50
1.00
1.00
2.00
1.600
1.600
1.500
0.800
1.400
0.400
0.150
0.150
0.100
0.110
0.110
0.040
0.060
0.060
0.060
0.050
0.050
0.040
0.040
0.040
0.030
0.030
0.020
15.000
15.000
6.000
5.000
4.400
1.700
1.000
1.000
0.450
0.290
0.400
0.210
0.180
0.200
0.200
0.140
0.140
0.110
0.110
0.120
0.100
0.100
0.070
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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 (V
max
)
P
d
= Power dissipated from device when in the tripped state at 20°C still air.
continues on next page.
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.
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/01/14
POLY-FUSE
®
Resettable PTCs
Surface Mount > 1812L Series
Electrical Characteristics
Part Number
1812L200/12
1812L200/16
1812L260TH
1
1812L260/12
1812L260/16
1812L300
Marking
LF200-12
LF200-16
LF260
LF260-12
LF260-16
LF300
I
hold
(A)
2.00
2.00
2.60
2.60
2.60
3.00
I
trip
(A)
3.50
3.50
5.00
5.00
5.00
5.00
V
max
(Vdc)
12
16
8
12
16
6
I
max
(A)
100
100
100
100
100
100
P
d
typ.
(W)
1.0
1.0
0.8
0.8
1.2
0.8
Max. Time To Trip
Current
Time
(A)
(Sec.)
Resistance
R
min
R
1max
(Ω)
(Ω)
Agency Approvals
8.00
8.00
8.00
8.00
8.00
8.00
2.00
2.00
2.50
5.00
5.00
4.00
0.020
0.020
0.015
0.015
0.015
0.012
0.070
0.070
0.047
0.055
0.050
0.040
X
X
X
X
X
X
X
X
X
X
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 (V
max
)
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.
Temperature Rerating
Ambient Operation Temperature
-40°C
Part Number
1812L010
1812L010/60
1812L014
1812L020
1812L020/60
1812L035/30
1812L050
1812L050/30
1812L075
1812L075/24
1812L075/33
1812L110
1812L110/16
1812L110/24
1812L110/33
1812L125/6
1812L125/16
1812L150
1812L150/12
1812L150/24
1812L160
1812L160/12
1812L200TH
1812L200/12
1812L200/16
1812L260TH
1812L260/12
1812L260/16
1812L300
0.16
0.14
0.23
0.29
0.30
0.50
0.77
0.77
1.15
1.06
1.10
1.59
1.58
1.55
1.55
2.00
2.00
2.06
2.04
2.05
2.20
2.20
2.60
2.80
2.80
3.40
3.40
3.66
4.13
0.14
0.13
0.19
0.26
0.27
0.45
0.68
0.68
1.01
0.95
1.00
1.43
1.43
1.40
1.40
1.75
1.75
1.93
1.88
1.87
2.06
2.06
2.44
2.60
2.60
3.16
3.16
3.30
3.75
0.12
0.11
0.17
0.23
0.23
0.40
0.59
0.59
0.88
0.84
0.88
1.26
1.27
1.25
1.25
1.52
1.52
1.79
1.68
1.67
1.91
1.91
2.22
2.36
2.36
3.00
3.00
2.96
3.30
0.10
0.10
0.14
0.20
0.20
0.35
0.50
0.50
0.75
0.75
0.75
1.10
1.10
1.10
1.10
1.25
1.25
1.50
1.50
1.50
1.60
1.60
2.00
2.00
2.00
2.60
2.60
2.60
3.00
-20°C
0°C
20°C
40°C
Hold Current (A)
0.08
0.09
0.12
0.17
0.17
0.30
0.44
0.44
0.65
0.60
0.66
0.95
0.95
0.93
0.93
1.00
1.00
1.28
1.25
1.25
1.36
1.36
1,78
1.72
1.72
2.30
2.30
2.23
2.61
0.07
0.08
0.10
0.15
0.14
0.26
0.40
0.40
0.60
0.55
0.60
0.87
0.85
0.83
0.83
0.95
0.95
1.10
1.10
1.08
1.17
1.17
1.67
1.56
1.56
2.15
2.15
2.06
2.43
0.06
0.07
0.09
0.14
0.13
0.24
0.37
0.37
0.55
0.50
0.56
0.80
0.77
0.73
0.73
0.90
0.90
1.02
1.00
0.95
1.09
1.09
1.50
1.40
1.40
2.00
2.00
1.89
2.25
0.05
0.07
0.08
0.12
0.11
0.20
0.33
0.33
0.49
0.45
0.47
0.71
0.71
0.63
0.63
0.75
0.75
0.80
0.80
0.77
0.85
0.85
1.45
1.20
1.20
1.85
1.85
1.61
2.00
0.03
0.05
0.06
0.10
0.08
0.16
0.29
0.29
0.43
0.37
0.36
0.60
0.58
0.50
0.50
0.53
0.53
0.68
0.60
0.60
0.72
0.72
1.29
1.04
1.04
1.63
1.63
1.30
1.78
50°C
60°C
70°C
85°C
Notes: The temperature rerating data is only for reference, please contact Littelfuse technical support for detail temperature rerating information.
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/01/14
POLY-FUSE
®
Resettable PTCs
Surface Mount > 1812L Series
Temperature Rerating Curve
170%
150%
Percentage of Rated Current
130%
110%
90%
70%
50%
30%
10%
-40
-30 -20
-10
0
10
20 30
40
Temperature (°C)
50
60
70
80 85
Physical Specifications
Terminal Material
Lead Solderability
Solder-Plated Copper (Solder Material:
Matte Tin (Sn))
Meets EIA Specification RS186-9E, ANSI/
J-STD-002 Category 3.
Environmental Specifications
Operating/Storage Temp.
-40°C to +85°C
Max. Device Surface Temp.
125°C
in Tripped State
Passive Aging
Humidity Aging
Thermal Shock
Solvent Resistance
Vibration
Moisture Level Sesitivity
+85°C, 1000 hours
-/+5% typical resistance change
+85°C, 85% R.H.,1000 hours
-/+5% typical resistance change
MIL–STD–202, Method 107G
+85°C/-40°C 20 times
-30% typical resistance change
MIL–STD–202, Method 215,
No change
MIL–STD–883C, Method 2007
.1,
Condition A, No change
Level 1, J–STD–020C
Soldering Parameters
Condition
Peak Temp/ Duration Time
Time above liquids (TAL) 220°C
Preheat 120°C~ 180°C
Storage Condition
Reflow
260°C / 10 Sec
60 Sec ~ 100 Sec
Temperature (°C)
260
220
Soldering
Cooling
50 Sec ~ 150 Sec
0°C~35°C,
<
70%RH
=
• Recommended reflow methods: IR, vapor phase oven, hot air
oven, N
2
environment for lead–free
• Recommended maximum paste thickness is 0.25mm (0.010 inch)
• Devices can be cleaned using standard industry methods and
solvents.
Note:
If reflow temperatures exceed the recommended profile,
devices may not meet the performance requirements.
180
120
Preheating
0
50 to 150
60 to 100
Time(s)
120
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/01/14
POLY-FUSE
®
Resettable PTCs
Surface Mount > 1812L Series
Average Time Current Curves
0.50A
0.75A
1.10A
1.10A/16V
1.25A/6V
1.25A/16V
1.50A
1.50A/12V
1.60A
2.00A
0.50A
2.60A, 2.60A/12V
0.75A
2.60A/16V
1.10A
3.00A
1.10A/16V
1.25A/6V
1.25A/16V
1.50A
1.50A/12V
1.60A
2.00A
2.60A, 2.60A/12V
2.60A/16V
3.00A
0
100
1812L
1812L
0.10/60
0.10
0.20/60
0.14
0.20
0.35/30
0.50/30
0.75/33
0.75/24
0.10/60
1.10/33
0.10
1.10/24
0.20/60
1.50/24
0.14
2.00/12
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
100
100
1812L
1812L
10
10
10
Time in Seconds
Time in Seconds
1
Time in Seconds
1
1
1
0.1
0.1
0.1
1
0.1
1
0.01
0.1
10
1
100
10
100
0.01
0.1
0.01
0.1
10
1
100
10
100
Current in Amperes Current in Amperes
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.
Current in Amperes Current in Amperes
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/01/14
POLY-FUSE
®
Resettable PTCs
Surface Mount > 1812L Series
Dimensions
MARKING CODE VARIES
WITH AMPERAGE AND VOLTAGE RATING
(See Electrical Characteristics Table)
SHOWN ARE:
- 1.1A/6V RATING (LEFT)
- 1.1A/33V RATING (RIGHT)
A
C
Top
View
110
110
D
B
110
-33
Side
View
Bottom
View
Pad
Layout
E
3.45 mm
(.135”)
3.15 mm
(.124”)
1.78mm
(.070”)
Part
Number
1812L010
1812L010/60
1812L014
1812L020
1812L020/60
1812L035/30
1812L050
1812L050/30
1812L075
1812L075/24
1812L075/33
1812L110
1812L110/24
1812L110/16
1812L110/33
1812L125/6
1812L125/16
1812L150
1812L150/12
1812L150/24
1812L160
1812L160/12
1812L200TH
1812L200/12
1812L200/16
1812L260TH
1812L260/12
1812L260/16
1812L300
A
Inches
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.18
0.17
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
0.19
B
mm
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.37
4.54
4.37
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.73
4.90
4.73
C
mm
Inches
0.03
0.03
0.03
0.02
0.03
0.02
0.02
0.02
0.02
0.03
0.03
0.02
0.02
0.03
0.05
0.02
0.03
0.02
0.03
0.03
0.02
0.03
0.03
0.03
0.02
0.03
0.05
0.03
0.05
0.05
0.08
0.04
0.05
0.04
0.03
0.04
0.03
0.06
0.06
0.03
0.04
0.05
0.08
0.03
0.05
0.03
0.05
0.07
0.03
0.05
0.05
0.05
0.04
0.05
0.08
0.06
D
mm
0.75
0.75
0.75
0.55
0.75
0.6
0.5
0.5
0.5
0.75
0.75
0.5
0.5
0.75
1.2
0.75
0.4
0.75
0.8
0.4
0.75
0.2
0.80
0.80
0.5
0.8
1.20
0.8
1.25
1.25
1.95
1
1.25
1.25
0.75
1
0.75
1.55
1.55
0.71
1.07
1.25
2
1.25
0.71
1.25
1.8
0.75
1.25
0.6
E
mm
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.20
1.20
1.2
1.2
1.20
1.2
Inches
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
Inches
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
Inches
Min
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.03
0.03
0.03
0.03
0.02
0.03
0.02
0.03
0.03
0.02
0.03
0.03
0.03
0.03
0.02
0.03
0.03
0.03
0.03
0.03
0.02
mm
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.15
0.65
0.65
0.65
0.65
0.65
0.65
0.5
0.65
0.5
0.65
0.65
0.5
0.65
0.65
0.65
0.65
0.5
0.65
0.65
0.65
0.65
0.65
0.5
0.65
0.65
0.5
0.65
0.65
0.65
Min Max Min Max Min Max Min Max Min
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.13 3.07 3.41
0.14
3.16 3.50
0.13 3.07 3.41
Max Min Max Min Max Min Max
Max Min Max
0.006 0.03
0.006 0.03
0.45 0.75
0.13 3.07 3.41 0.008 0.024
1.20 0.012 0.047 0.30
1.20 0.012 0.047 0.30
1.0
1.34
1.50
0.01
0.01
0.01
0.05
0.05
0.05
0.3
0.3
0.3
0.006 0.026 0.15
0.006 0.026 0.15
0.01
0.01
0.01
0.02
0.03
0.03
0.15
0.15
0.15
2.00 0.012 0.047 0.30
0.006 0.026 0.15
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/01/14
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