Littelfuse 1812L Series User Manual
1812l series, Poly-fuse, Resettable ptcs
POLY-FUSE
®
Resettable PTCs
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/05/13
1
81
2L S
eries
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
1.00
2.00
1.400
4.400
X
X
1812L035/30
LF035-30
0.35
0.75
30
100
0.8
8.00
0.15
0.400
1.700
X
X
1812L050
1
LF050
0.50
1.00
15
100
0.8
8.00
0.15
0.150
1.000
X
X
1812L050/30
LF050-30
0.50
1.00
30
100
0.8
8.00
0.15
0.150
1.000
X
X
1812L075
1
LF075
0.75
1.50
13.2
100
0.8
8.00
0.20
0.100
0.450
X
X
1812L075/24
LF075-24
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
1
LF110
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
1
LF150
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
1812L150/24
LF150-24
1.50
3.00
24
20
0.8
8.00
1.50
0.040
0.120
X
X
1812L160
1
LF160
1.60
2.80
8
100
0.8
8.00
1.00
0.030
0.100
X
X
1812L160/12
LF160-12
1.60
2.80
12
100
0.8
8.00
1.00
0.030
0.100
X
X
1812L200TH
1
LF200
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
AGENCY
AGENCY FILE NUMBER
E183209
R50119118
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 (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.
continues on next page.
1812L Series
RoHS