LITTELFUSE 1812L_06

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
Agency Approvals
AGENCY
• Low resistance
• Low-profile
• Compatible with high
temperature solders
• RoHS compliant and
lead-free
• Fast response to fault
currents
• Compact design saves
board space
AGENCY FILE NUMBER
Applications
E183209
• Plug and play protection
for motherboards and
peripherals
• USB peripherals
R50082521
• PCI cards
• Game console port
protection
Electrical Characteristics
Marking
I hold
(A)
I trip
(A)
V max
(Vdc)
I max
(A)
Pd
max.
(W)
1812L010
LF010
0.10
0.30
30
100
1812L014
LF014
0.14
0.34
60
10
1812L020
LF020
0.20
0.40
30
1812L050-C
LF050
0.50
1.00
1812L075-C
LF075
0.75
1.50
1812L075/24
LF075-24
0.75
1.50
24
Part Number
Maximum Time
To Trip
Agency
Approvals
Resistance
Current
(A)
Time
(Sec.)
R min
(Ω)
R typ
(Ω)
R 1max
(Ω)
0.8
0.50
1.50
1.600
7.000
15.000
X
X
0.8
1.50
0.15
1.500
4.000
6.000
X
X
100
0.8
8.00
0.02
0.800
2.900
5.000
X
X
15
100
0.8
8.00
0.15
0.150
0.600
1.000
X
X
13.2
100
0.8
8.00
0.20
0.100
0.260
0.450
X
X
100
0.8
8.00
0.20
0.110
0.200
0.290
X
X
0.110
0.260
0.400
X
X
1812L075/33
LF075-33
0.75
1.50
33
20
0.8
8.00
0.20
1812L110-C
LF110
1.10
2.20
6
100
0.8
8.00
0.30
0.040
0.120
0.210
X
X
1812L110/16
LF110-16
1.10
1.95
16
100
0.8
8.00
0.50
0.060
0.120
0.180
X
X
1812L110/33
LF110-33
1.10
1.95
33
20
0.8
8.00
0.50
0.060
0.120
0.200
X
X
1812L125-C
LF125
1.25
2.50
15
100
0.8
8.00
0.40
0.050
0.160
0.250
X
X
1812L125/6
LF125-6
1.25
2.50
6
100
0.8
8.00
0.40
0.050
0.090
0.140
X
X
1812L150-C
LF150
1.50
3.00
8
100
0.8
8.00
0.30
0.040
0.070
0.110
X
X
1812L150/12
LF150-12
1.50
3.00
12
100
0.8
8.00
0.50
0.040
0.070
0.110
X
X
1812L150/24
LF150-24
1.50
3.00
24
20
0.8
8.00
1.50
0.040
0.070
0.120
X
X
1812L160-C
LF160
1.60
2.80
8
100
0.8
8.00
1.00
0.030
0.066
0.100
X
X
1812L Series
Specifications are subject to change without notice.
Electronics Designers Guide
www.littelfuse.com
©2006 Littelfuse
POLYFUSE® Resettable PTCs
Surface Mount
Electrical Characteristics (continued)
I trip
(A)
V max
(Vdc)
I max
(A)
Pd
max.
(W)
Part Number
Marking
I hold
(A)
1812L160/12
LF160-12
1.60
2.80
12
100
1812L200-C
LF200
2.00
3.50
8
100
1812L260-C
LF260
2.60
5.00
6
100
Maximum Time
To Trip
Agency
Approvals
Resistance
Current
(A)
Time
(Sec.)
R min
(Ω)
R typ
(Ω)
R 1max
(Ω)
0.8
8.00
1.00
0.030
0.066
0.100
X
X
0.8
8.00
2.00
0.020
0.040
0.060
X
X
0.8
8.00
2.50
0.015
0.030
0.047
X
X
I hold = Hold current: maximum current device will pass without tripping in 20°C still air.
R typ = Typical resistance of device in initial (un-soldered) state.
I trip = Trip current: minimum current at which the device will trip in 20°C still air.
R 1max = Maximum resistance of device at 20°C measured one hour after tripping or reflow
soldering of 260°C for 20 sec.
V max = Maximum voltage device can withstand without damage at rated current (I max)
Caution: Operation beyond the specified rating may result in damage and possible arcing
and flame.
I max = Maximum fault current device can withstand without damage at rated voltage (Vmax)
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.
Temperature Rerating
Ambient Operation Temperature
-40°C
-20°C
0°C
23°C
Part Number
40°C
50°C
60°C
70°C
85°C
Hold Current (A)
1812L010
0.16
0.14
0.12
0.10
0.08
0.07
0.06
0.05
0.03
1812L014
0.23
0.19
0.17
0.14
0.12
0.10
0.09
0.08
0.06
1812L020
0.29
0.26
0.23
0.20
0.17
0.15
0.14
0.12
0.10
1812L050-C
0.77
0.68
0.59
0.50
0.44
0.40
0.37
0.33
0.29
1812L075-C
1.15
1.01
0.88
0.75
0.65
0.60
0.55
0.49
0.43
1812L075/24
1.06
0.95
0.84
0.75
0.60
0.55
0.50
0.45
0.37
1812L075/33
1.10
1.00
0.88
0.75
0.66
0.60
0.56
0.47
0.36
1812L110-C
1.59
1.43
1.26
1.10
0.95
0.87
0.80
0.71
0.60
1812L110/16
1.58
1.43
1.27
1.10
0.95
0.85
0.77
0.71
0.58
1812L110/33
1.55
1.40
1.25
1.10
0.93
0.83
.073
.063
.050
1812L125-C
2.00
1.75
1.52
1.25
1.00
0.95
0.90
0.75
0.53
1812L125/6
2.00
1.75
1.52
1.25
1.00
0.95
0.90
0.75
0.53
1812L150-C
2.06
1.93
1.79
1.50
1.28
1.10
1.02
0.80
0.68
1812L150/12
2.04
1.88
1.68
1.50
1.25
1.10
1.00
0.80
0.60
1812L150/24
2.05
1.87
1.67
1.50
1.25
1.08
0.95
0.77
0.60
1812L160-C
2.20
2.06
1.91
1.60
1.36
1.17
1.09
0.85
0.72
1812L160/12
2.18
2.01
1.79
1.60
1.34
1.16
1.07
0.83
0.60
1812L200-C
3.08
2.71
2.35
2.00
1.80
1.60
1.50
1.07
0.80
1812L260-C
4.00
3.52
3.06
2.60
2.34
2.08
1.95
1.39
1.04
1812L Series
Specifications are subject to change without notice.
Electronics Designers Guide
www.littelfuse.com
©2006 Littelfuse
POLYFUSE® Resettable PTCs
Surface Mount
1812L Series
Temperature Rerating Curve
0.500A
0.750A/24V
0.750A
0.750A/33V
1.10A/16V
1.10A/33V
1.10A
1.25A
1.25A/6V
1.50A/12V
1.50A-/8V
1.50A/24V
1.60A/12V
1.60A
1.60A/8
2.00A
2.60A
0.100A
0.140A
0.200A
Average Time Current Curves
100000
10000
TIME IN SECONDS
1000
100
10
1
0.100
0.010
0.001
0.02
0.100
1
10
100
CURRENT IN AMPERES
Specifications are subject to change without notice.
Note: 1.00 means the number one with two decimal places.
AKL V3.9 06.05.10
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
Specifications are subject to change without notice.
Electronics Designers Guide
www.littelfuse.com
©2006 Littelfuse
POLYFUSE® Resettable PTCs
Surface Mount
Soldering Parameters
Condition
Reflow
Peak Temp/ Duration Time
260°C / 10 Sec
Time above liquids (TAL) 220°C
60 Sec ~ 100 Sec
Preheat 120°C~ 180°C
50 Sec ~ 150 Sec
0°C~35°C, <
=70%RH
Cooling
220
Temperature (°C)
Storage Condition
Soldering
260
•R
ecommended reflow methods: IR, vapor phase oven, hot air
oven, N2 environment for lead-free
• Devices are not designed to be wave soldered to the bottom side
of the board.
• Recommended maximum paste thickness is 0.25mm (0.010 inch)
• Devices can be cleaned using standard industry methods and
solvents.
Note: If reflow temperatures exceed the recommended profile,
devices may not meet the performance requirements.
180
120
0
Preheating
50 to 150
60 to 100
120
Time(s)
Physical Specifications
Environmental Specifications
Terminal Material
Solder-Plated Copper (Solder Material:
Matte Tin (Sn))
Operating/Storage
Temperature
-40°C to +85°C
Lead Solderability
Meets EIA Specification RS186-9E, ANSI/
J-STD-002 Category 3.
Maximum Device Surface
Temperature in Tripped State
125°C
Passive Aging
+85°C, 1000 hours
±5% typical resistance change
Humidity Aging
+85°C, 85%R.H. 1000 hours
±5% typical resistance change
Thermal Shock
MIL-STD-202 Method 107G
+85°C/-40°C 20 times
-30% typical resistance change
Solvent Resistance
MIL-STD-202, Method 215
No change
Vibration
MIL-STD-883C, Method 2007.1,
Condition A
No change
1812L Series
Specifications are subject to change without notice.
Electronics Designers Guide
www.littelfuse.com
©2006 Littelfuse
POLYFUSE® Resettable PTCs
Surface Mount
Dimensions
MARKING CODE VARIES
WITH AMPERAGE AND VOLTAGE RATING
(SEE CHART)
SHOWN ARE:
- 1.1A/6V RATING (LEFT)
- 1.1A/33V RATING (RIGHT)
C
A
Top
View
110
Bottom
View
110
110
-33
B
3.45 mm
(.135”)
Pad
Layout
D
Side
View
E
1.78mm
(.070”)
A
Part Number
Inches
3.15 mm
(.124”)
B
mm
C
Inches
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
Min.
Min.
Min Max. Min. Max.
1812L010
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.03
0.05
0.75
1.25
0.01
0.30
0.01
0.03
0.25
0.65
1812L014
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.03
0.08
0.75
1.95
0.01
0.30
0.01
0.03
0.25
0.65
1812L020
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.02
0.04
0.55
1
0.01
0.30
0.01
0.03
0.25
0.65
1812L050-C
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.02
0.03
0.5
0.75
0.01
0.30
0.01
0.02
0.25
0.5
1812L075-C
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.02
0.03
0.5
0.75
0.01
0.30
0.01
0.02
0.25
0.5
1812L075/24
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
0.30
0.01
0.03
0.25
0.65
1812L075/33
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
0.30
0.01
0.03
0.25
0.65
1812L110-C
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.02
0.03
0.5
0.71
0.01
0.30
0.01
0.02
0.25
0.5
1812L110/16
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.03
0.05
0.75
1.25
0.01
0.30
0.01
0.03
0.25
0.65
1812L110/33
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.05
0.08
1.2
2
0.01
0.30
0.01
0.03
0.25
0.65
1812L125-C
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.03
0.05
0.75
1.25
0.01
0.30
0.01
0.02
0.25
0.5
1812L125/6
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.02
0.03
0.45
0.75
0.01
0.30
0.01
0.03
0.25
0.65
1812L150-C
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.02
0.03
0.4
0.71
0.01
0.30
0.01
0.03
0.25
0.65
1812L150/12
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.03
0.05
0.75
1.25
0.01
0.30
0.01
0.03
0.25
0.65
1812L150/24
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.03
0.07
0.8
1.8
0.01
0.30
0.01
0.03
0.25
0.65
1812L160-C
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.02
0.03
0.4
0.75
0.01
0.30
0.01
0.03
0.25
0.65
1812L160/12
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.03
0.05
0.75
1.25
0.01
0.30
0.01
0.03
0.25
0.65
1812L200-C
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.03
0.05
0.81
1.2
0.01
0.30
0.01
0.02
0.25
0.5
1812L260-C
0.17
0.19
4.37
4.73
0.12
0.13
3.07
3.41
0.03
0.05
0.8
1.34
0.01
0.30
0.01
0.02
0.25
0.5
Electronics Designers Guide
mm
E
mm
Specifications are subject to change without notice.
mm
D
Inches
1812L Series
Inches
Inches
mm
www.littelfuse.com
©2006 Littelfuse
POLYFUSE® Resettable PTCs
Surface Mount
Part Numbering 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)
I HOLD CURRENT CODE (SEE TABLE BELOW)
L: LITTELFUSE SURFACE MOUNT PPTC
SIZE
Packaging
I hold
(A)
I hold Code
0.10
0.14
Packaging
Option
Quantity
Quantity &
Packaging Codes
010
Tape and Reel
1500
DR
014
Tape and Reel
1500
DR
0.20
020
Tape and Reel
2000
PR
0.50
050
Tape and Reel
2000
PR
Tape and Reel
2000
PR
/24
Tape and Reel
1500
DR
/33
Tape and Reel
1500
DR
Tape and Reel
2000
PR
/16
Tape and Reel
1500
DR
/33
Tape and Reel
1000
MR
Tape and Reel
1500
DR
Tape and Reel
2000
PR
Tape and Reel
2000
ZR
/12
Tape and Reel
1500
DR
/24
Tape and Reel
1000
MR
Tape and Reel
2000
PR
Tape and Reel
1500
DR
0.75
1.10
1.25
1.50
Voltage
Option
075
110
125
150
/6
1.60
160
2.00
200
Tape and Reel
1500
DR
2.60
260
Tape and Reel
1000
ZR
1812L Series
Specifications are subject to change without notice.
/12
Electronics Designers Guide
www.littelfuse.com
©2006 Littelfuse