®
POLY-FUSE Resettable PTCs
Surface Mount > 1812L Series
RoHS
1812L Series
Description
The 1812L Series PTC provides surface mount overcurrent
protection for applications where resettable protection is
desired.
Features
• RoHS compliant, lead-free • Low resistance
and halogen-free
• Low-profile
• Fast response
• Compatible with high
• Compact design
temperature solders
Applications
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
• Plug and play protection
for motherboards and
peripherals
• PCI cards
• Game console port
protection
R50119118
• USB peripherals
Electrical Characteristics
Max.TimeToTrip
P d typ.
Resistance
Agency Approvals
I hold
(A)
I trip
(A)
V max
(Vdc)
I max
(A)
Part Number Marking
Current
(A)
Time
(Sec.)
R min
R 1max
(W)
(Ω)
(Ω)
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
1812L010
1812L010/60 LF010-60
1812L014
1812L020
LF010
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
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
30
60
60
30
60
30
15
30
13.2
24
33
8
16
24
33
6
16
8
100
10
10
100
40
100
100
100
100
100
20
100
100
20
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
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
LF014
LF020
1812L020/60 LF020-60
1812L035/30 LF035-30
1812L050 1
LF050
1812L050/30 LF050-30
LF075
1812L075 1
1812L075/24 LF075-24
1812L075/33 LF075-33
1812L110 1
1812L110/16
1812L110/24
1812L110/33
1812L125/6
1812L125/16
1812L150 1
LF110
LF110-16
LF110-24
LF110-33
LF125-6
LF125
20
100
100
100
100
20
100
100
100
LF150
1812L150/12 LF150-12
1812L150/24 LF150-24
12
24
8
12
8
1812L160 1
LF160
1812L160/12 LF160-12
1812L200TH 1
LF200
continues on next page.
I hold = Hold current: maximum current device will pass without tripping in 20°C still air.
trip =Trip current: minimum current at which the device will trip in 20°C still air.
max = Maximum voltage device can withstand without damage at rated current (I max)
max = Maximum fault current device can withstand without damage at rated voltage (Vmax
R min = Minimum resistance of device in initial (un-soldered) state.
I
V
I
R
R
typ =Typical resistance of device in initial (un-soldered) state.
1max = Maximum resistance of device at 20°C measured one hour after tripping or reflow
soldering of 260°C for 20 sec.
)
P
d = Power dissipated from device when in the tripped state at 20°C still air.
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.
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/05/13
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