POLYFUSE
®
Resettable PTCs
Surface Mount > 1812L Series
1812L Series
Description
The 1812L Series device provides surface mount
overcurrent protection for applications where resettable
protection is desired.
Features
lead-free
currents
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50119118
temperature solders
board space
Applications
for motherboards and
peripherals
protection
Electrical Characteristics
P
d
max.
(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
Maximum Time
To Trip
Current
(A)
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
8.00
8.00
8.00
Time
(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
1.00
2.00
2.50
R
min
(Ω)
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
0.030
0.020
0.015
Resistance
R
typ
(Ω)
7
.000
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
0.066
0.040
0.030
R
1max
(Ω)
15.000
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
0.100
0.060
0.047
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
Part Number*
Marking
I
hold
(A)
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
1.50
1.60
1.60
2.00
2.60
I
trip
(A)
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
2.80
3.50
5.00
V
max
(Vdc)
30
60
30
15
13.2
24
33
6
16
33
15
6
8
12
24
8
12
8
6
I
max
(A)
100
10
100
100
100
100
20
100
100
20
100
100
100
100
20
100
100
100
100
Agency
Approvals
1812L010
1812L014
1812L020
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
1812L160/12
1812L200
–C
1812L260
–C
LF010
LF014
LF020
LF050
LF075
LF075-24
LF075-33
LF110
LF110-16
LF110-33
LF125
LF125-6
LF150
LF150-12
LF150-24
LF160
LF160-12
LF200
LF260
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.
*Note:
Some devices in this product series may have “–C“ in the Part Number. The “–C“ should be omitted when placing orders for the device.
©2008 Littelfuse, Inc.
Revised: October 24, 2008
1812L Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
1812L Series
POLYFUSE
®
Resettable PTCs
Surface Mount > 1812L Series
Temperature Rerating
Ambient Operation Temperature
-40°C
Part Number*
1812L010
1812L014
1812L020
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
1812L160/12
1812L200
–C
1812L260
–C
0.16
0.23
0.29
0.77
1.15
1.06
1.10
1.59
1.58
1.55
2.00
2.00
2.06
2.04
2.05
2.20
2.18
3.08
4.00
0.14
0.19
0.26
0.68
1.01
0.95
1.00
1.43
1.43
1.40
1.75
1.75
1.93
1.88
1.87
2.06
2.01
2.71
3.52
0.12
0.17
0.23
0.59
0.88
0.84
0.88
1.26
1.27
1.25
1.52
1.52
1.79
1.68
1.67
1.91
1.79
2.35
3.06
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
1.50
1.60
1.60
2.00
2.60
-20°C
0°C
23°C
40°C
Hold Current (A)
0.08
0.12
0.17
0.44
0.65
0.60
0.66
0.95
0.95
0.93
1.00
1.00
1.28
1.25
1.25
1.36
1.34
1.80
2.34
0.07
0.10
0.15
0.40
0.60
0.55
0.60
0.87
0.85
0.83
0.95
0.95
1.10
1.10
1.08
1.17
1.16
1.60
2.08
0.06
0.09
0.14
0.37
0.55
0.50
0.56
0.80
0.77
0.73
0.90
0.90
1.02
1.00
0.95
1.09
1.07
1.50
1.95
0.05
0.08
0.12
0.33
0.49
0.45
0.47
0.71
0.71
0.63
0.75
0.75
0.80
0.80
0.77
0.85
0.83
1.07
1.39
0.03
0.06
0.10
0.29
0.43
0.37
0.36
0.60
0.58
0.50
0.53
0.53
0.68
0.60
0.60
0.72
0.60
0.80
1.04
50°C
60°C
70°C
85°C
*Note:
Some devices in this product series may have “–C“ in the Part Number. The “–C“ should be omitted when placing orders for the device.
Temperature Rerating Curve
Average Time Current Curves
0.10A
0.14A
0.20A
0.50A
0.75A/33V
0.75A/24V
0.75A
1.10A/16V
1.10A/33V
1.10A
1.25A
1.25A/6V
1.50A/12V
1.50A
1.50A/24V
1.60A/12V
1.60A
1.60A/8V
2.00A
2.60A
100000
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
1812L
10000
1000
Time in Seconds
100
10
1
0.1
0.01
0.1
1
10
100
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.
1812L Series
Revised: October 24, 2008
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
POLYFUSE
®
Resettable PTCs
Surface Mount > 1812L Series
Physical Specifications
Solder-Plated Copper (Solder Material:
Matte Tin (Sn))
Meets EIA Specification RS186-9E, ANSI/
J-STD-002 Category 3.
Environmental Specifications
Operating/Storage
Temperature
Maximum Device Surface
Temperature in Tripped State
Passive Aging
Humidity Aging
-40°C to +85°C
125°C
+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 2, J–STD–020C
Terminal Material
Lead Solderability
Solvent Resistance
Vibration
Moisture Level Sesitivity
Soldering Parameters
Condition
Peak Temp/ Duration Time
Time above liquids (TAL) 220°C
Preheat 120°C~ 180°C
Storage Condition
oven, N
2
environment for lead–free
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
=
Preheating
180
120
solvents.
Note:
If reflow temperatures exceed the recommended profile,
devices may not meet the performance requirements.
0
50 to 150
60 to 100
Time(s)
120
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
Revised: October 24, 2008
1812L Series
1812L Series
Thermal Shock
POLYFUSE
®
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”)
Part
Number*
1812L010
1812L014
1812L020
1812L050
–C
1812L075
–C
A
Inches
0.17
0.17
0.17
0.17
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
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
4.73
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
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
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
0.13
B
mm
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
Inches
0.03
0.03
0.02
0.02
0.02
0.03
0.03
0.02
0.03
0.05
0.03
0.02
0.02
0.03
0.03
0.02
0.03
0.03
0.03
0.05
0.08
0.04
0.03
0.03
0.06
0.06
0.03
0.05
0.08
0.05
0.03
0.03
0.05
0.07
0.03
0.05
0.05
0.05
C
mm
0.75
0.75
0.55
0.5
0.5
0.75
0.75
0.5
0.75
1.2
0.75
0.45
0.4
0.75
0.8
0.4
0.75
0.81
0.8
1.25
1.95
1
0.75
0.75
1.55
1.55
0.71
1.25
2
1.25
0.75
0.71
1.25
1.8
0.75
1.25
1.2
1.34
D
Inches mm
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
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
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
0.03
0.03
0.03
0.02
0.02
0.03
0.03
0.02
0.03
0.03
0.02
0.03
0.03
0.03
0.03
0.03
0.03
0.02
0.02
E
mm
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.65
0.65
0.65
0.5
0.5
0.65
0.65
0.5
0.65
0.65
0.5
0.65
0.65
0.65
0.65
0.65
0.65
0.5
0.5
Min Max. Min. Max.
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Min.
1812L075/24 0.17
1812L075/33 0.17
1812L110
–C
1812L110/16
1812L110/33
1812L125
–C
1812L125/6
1812L150
–C
1812L150/12
1812L160
–C
1812L160/12
1812L200
–C
1812L260
–C
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
0.17
1812L150/24 0.17
*Note:
Some devices in this product series may have “–C“ in the Part Number. The “–C“ should be omitted when placing orders for the device.
1812L Series
Revised: October 24, 2008
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
POLYFUSE
®
Resettable PTCs
Surface Mount > 1812L Series
Part Ordering Number System*
1812 L 075 /33 D R
PACKAGING STYLE
R:
Tape
& Reel
SERIES
QUANTITY CODE:
D=1500 M=1000 P=2000
/XX: SPECIAL VOLTAGE RATING
(Not applicable to all parts. Refer to
Electrical Characteristics
Table)
I
HOLD
HOLD CURRENT CODE
(Refer to Electrical Characteristics
Table)
SIZE
Packaging
Part Number*
1812L010
1812L014
1812L020
1812L050-C
1812L075-C
1812L75/24
1812L75/33
1812L110-C
1812L110/16
1812L110/33
1812L125-C
1812L125/6
1812L150-C
1812L150/12
1812L150/24
1812L160-C
1812L160/12
1812L200-C
1812L260-C
Ordering Number*
1812L010DR
1812L014DR
1812L020PR
1812L050PR
1812L075PR
1812L75/24DR
1812L75/33DR
1812L110PR
1812L110/16DR
1812L110/33MR
1812L125DR
1812L125/6PR
1812L150ZR
1812L150/12DR
1812L150/24MR
1812L160PR
1812L160/12DR
1812L200DR
1812L260ZR
I
hold
(A)
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
1.50
1.60
1.60
2.00
2.60
I
hold
Code
010
014
020
050
075
075
075
110
110
110
125
125
150
150
150
160
160
200
260
/12
/12
/24
/6
/16
/33
/24
/33
Voltage
Option
Packaging
Option
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Quantity
1500
1500
2000
2000
2000
1500
1500
2000
1500
1000
1500
2000
2000
1500
1000
2000
1500
1500
1000
Quantity &
Packaging Codes
DR
DR
PR
PR
PR
DR
DR
PR
DR
MR
DR
PR
ZR
DR
MR
PR
DR
DR
ZR
*Note:
Some devices in this product series may have “–C“ in the Part Number. The “–C“ should be omitted when placing orders for the device.
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
Revised: October 24, 2008
1812L Series
1812L Series
L: LITTELFUSE SURFACE MOUNT PPTC
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