POLY-FUSE
®
Resettable PTCs
Surface Mount > 1812L Series
1812L Series
Description
The 1812L Series PTC provides surface mount overcurrent
protection for applications where resettable protection is
desired.
Features
temperature solders
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50119118
Applications
for motherboards and
peripherals
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
1812L200/12
1812L260TH
1
1812L260/12
1812L300
hold
trip
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
LF200-12
LF260
LF260-12
LF300
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
2.00
2.60
2.60
3.00
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
3.50
5.00
5.00
5.00
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
12
8
12
6
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
100
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
1.0
0.8
0.8
0.8
Max. Time To Trip
Current
Time
(A)
(Sec.)
Resistance
R
min
R
1max
(Ω)
(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
8.00
8.00
8.00
8.00
min
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
2.00
2.50
5.00
4.00
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
0.020
0.015
0.015
0.012
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
0.070
0.047
0.055
0.040
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
X
X
X
X
X
X
X
X
V
max
P
d
Caution:
1
–C
max
max
1max
–C
© 2012 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
39
1812L Series
Revised: June 3, 2012
1812L Series
POLY-FUSE
®
Resettable PTCs
Surface Mount > 1812L Series
Temperature Rerating
Ambient Operation Temperature
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
1812L260TH
1812L260/12
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
2.82
3.40
3.40
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
3.16
3.16
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
3.00
3.00
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
2.60
2.60
3.00
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
1.74
2.30
2.30
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
1.44
2.15
2.15
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
2.00
2.00
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
1.85
1.85
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
1.00
1.63
1.63
1.78
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
Environmental Specifications
Operating/Storage Temp.
Max. Device Surface Temp.
in Tripped State
Passive Aging
Humidity Aging
Thermal Shock
Solvent Resistance
Vibration
Moisture Level Sesitivity
40
1812L Series
Revised: June 3, 2012
© 2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
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
3.45 mm
(.135”)
3.15 mm
(.124”)
E
1.78mm
(.070”)
A
Part
Number
1812L010
1812L014
1812L020
Inches
mm
Inches
B
mm
Inches
C
mm
Inches
D
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
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
1.2
1.2
1.2
1.2
Inches
E
mm
Min Max Min Max Min Max Min Max Min
0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
1812L010/60 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
Max Min Max Min Max Min Max Min Max Min Max
0.05 0.75 1.25 0.01 0.05
0.05 0.75 1.25 0.01 0.05
0.08 0.75 1.95 0.01 0.05
0.04 0.55
1
0.01 0.05
0.05 0.75 1.25 0.01 0.05
0.04 0.6 1.25 0.01 0.05
0.03 0.5 0.75 0.01 0.05
0.04
0.03
0.5
0.5
1
0.01 0.05
0.75 0.01 0.05
0.01 0.03 0.15 0.65
0.006 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.006 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.01 0.02 0.15 0.5
0.01 0.03 0.15 0.65
0.01 0.02 0.15
0.5
0.01 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.01 0.02 0.15
0.5
0.01 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.01 0.02 0.15
0.5
0.01 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.01 0.03 0.15 0.65
0.01 0.02 0.15
0.01 0.02 0.15
0.5
0.5
0.006 0.03 0.15 0.65
0.01 0.03 0.15 0.65
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
1812L035/30 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
1812L050 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
1812L050/30 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
1812L075
0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
1812L075/24 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
1812L075/33 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
1812L110
0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
1812L110/24 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
1812L110/16 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
1812L110/33 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.05
1812L125/6
1812L150
0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
1812L125/16 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
1812L150/12 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
1812L150/24 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
1812L160
0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
1812L160/12 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
1812L200/12 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
1812L260TH 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02
1812L260/12 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03
1812L300
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
0.06 0.75 1.55 0.01 0.05
0.03
0.04
0.08
0.5
0.5
1.2
0.71 0.01 0.05
1.07 0.01 0.05
2
0.01 0.05
0.05 0.75 1.25 0.01 0.05
0.03 0.45 0.75 0.01 0.05
0.05 0.75 1.25 0.01 0.05
0.03
0.07
0.03
0.4
0.8
0.4
0.71 0.01 0.05
1.8
0.01 0.05
0.05 0.75 1.25 0.01 0.05
0.75 0.01 0.05
0.6
1.0
0.01 0.05
0.01 0.05
0.05 0.75 1.25 0.01 0.05
0.05
0.04
0.05
0.06
0.8
0.5
0.8
0.8
1.20 0.01 0.05
1.34 0.01 0.05
1.50 0.01 0.05
1812L200TH 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.008 0.024 0.2
42
1812L Series
Revised: June 3, 2012
© 2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
POLY-FUSE
®
Resettable PTCs
Surface Mount > 1812L Series
Part Ordering Number System
1812 L xxx
/xx TH
Y R
PACKAGING STYLE
R:
Tape
& Reel
SERIES
QUANTITY CODE: M=1000 D=1500 P
or
Z
=2000
LOW PROFILE DEVICE INDICATOR
(Required, for L200 and L260 device orders only.
Refer to “C” in Dimensions section.)
SPECIAL VOLTAGE RATING ITEM
(Not applicable to all parts. Refer to Electrical
Characteristics
Table
for additional information)
I
HOLD
HOLD CURRENT CODE
(Refer to Electrical Characteristics
Table)
L: LITTELFUSE SURFACE MOUNT PPTC
DEVICE SIZE CODE
(0.18 x 0.12 inch)
Packaging
Part Number
1812L010
1812L010/60
1812L014
1812L020
1812L020/60
1812L035/30
1812L050
1812L050/30
1812L075
1812L75/24
1812L75/33
1812L110
1812L110/16
1812L110/24
1812L110/33
1812L125/6
1812L125/16
1812L150
1812L150/12
1812L150/24
1812L160
1812L160/12
1812L200TH
1812L200/12
1812L260TH
1812L260/12
1812L300
Ordering Number
Halogen Free
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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
2.00
2.60
2.60
3.00
I
hold
Code
010
010
014
020
020
035
050
050
075
075
075
110
110
1.10
110
125
125
150
150
150
160
160
200
200
260
260
300
Voltage
Option
/60
Packaging
Option
Quantity
1500
1500
1500
2000
1500
1500
2000
2000
2000
1500
1500
2000
1500
1500
1000
2000
1500
2000
1500
1000
2000
1500
2000
1500
1500
1000
1000
Quantity &
Packaging Code
/60
/30
/30
/24
/33
/16
/24
/33
/6
/16
/12
/24
/12
/12
/12
© 2012 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
43
1812L Series
Revised: June 3, 2012
1812L Series
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