POLYFUSE® Resettable PTCs
Surface Mount
1812L Series
Description
The 1812L series device provides surface mount
overcurrent protection for applications where resettable
protection is desired.
Features
• RoHS compliant and
lead-free
• Low resistance
• Low-profile
• Fast response to fault
currents
• Compatible with high
temperature solders
• Compact design saves
board space
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
Applications
• Plug and play protection
for motherboards and
peripherals
• PCI cards
R50082521
• Game console port
protection
• USB peripherals
Electrical Characteristics
Maximum Time
Agency
Approvals
Resistance
R typ
P d
max.
(W)
To Trip
I hold
(A)
I trip
(A)
V max
(Vdc)
I max
(A)
Part Number
Marking
R min
(Ω)
R 1max
(Ω)
Time
Current
(A)
(Sec.)
1.50
0.15
0.02
0.15
0.20
0.20
0.20
0.30
0.50
0.50
0.40
0.40
0.30
0.50
1.50
1.00
(Ω)
1812L010
LF010
LF014
0.10
0.14
0.20
0.50
0.75
0.75
0.75
1.10
1.10
1.10
1.25
1.25
1.50
1.50
0.30
0.34
0.40
1.00
1.50
1.50
1.50
2.20
1.95
1.95
2.50
2.50
3.00
3.00
3.00
2.80
30
60
30
15
13.2
24
33
6
100
10
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
1.50
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
1.600
1.500
0.800
0.150
0.100
0.110
0.110
0.040
0.060
0.060
0.050
0.050
0.040
0.040
0.040
0.030
7.000 15.000
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
1812L014
4.000
2.900
0.600
0.260
0.200
0.260
0.120
0.120
0.120
0.160
0.090
0.070
0.070
0.070
0.066
6.000
5.000
1.000
0.450
0.290
0.400
0.210
0.180
0.200
0.250
0.140
0.110
0.110
0.120
0.100
1812L020
LF020
100
100
100
100
20
1812L050-C
1812L075-C
1812L075/24
1812L075/33
1812L110-C
1812L110/16
1812L110/33
1812L125-C
1812L125/6
1812L150-C
1812L150/12
1812L150/24
1812L160-C
LF050
LF075
LF075-24
LF075-33
LF110
100
100
20
LF110-16
LF110-33
LF125
16
33
15
6
100
100
100
100
20
LF125-6
LF150
8
LF150-12
12
24
8
LF150-24 1.50
LF160
1.60
100
1
1812L Series
www.littelfuse.com
©2006 Littelfuse
Electronics Designers Guide
Specifications are subject to change without notice.