SMD1812 Series
Surface Mountable PTC Resettable Fuse
Features:
RoHS Compliant & Halogen Free
faster tripping, 1812 Dimension, Surface mountable, Solid state
Operation Current: 0.10A~3.50A
Maximum Voltage: 6V~60Vdc
O eratin Tem erature:-40℃ TO 85℃
Product Dimensions
Terminal pad materials :Tin-Plated Nickle-copper
Terminal pad solderability : Meets EIA specification
RS 186-9E and ANSI/J-STD-002 Category 3.
Pig.1
Unit :mm
Model
A
B
C
D
E
Min
Max
Min
Max
Min
Max
Min
Min
SMD1812P010TF
4.37
4.73
3.07
3.41
0.50
1.00
0.30
0.15
SMD1812P010TF/60
4.37
4.73
3.07
3.41
0.50
1.00
0.30
0.15
SMD1812P014TF/33
4.37
4.73
3.07
3.41
0.50
1.00
0.30
0.15
SMD1812P014TF
4.37
4.73
3.07
3.41
0.50
1.10
0.30
0.15
SMD1812P020TF
4.37
4.73
3.07
3.41
0.50
1.00
0.30
0.15
SMD1812P030TF
4.37
4.73
3.07
3.41
0.50
1.00
0.30
0.15
SMD1812P050TF
4.37
4.73
3.07
3.41
0.40
0.90
0.30
0.15
SMD1812P050TF/24
SMD1812P050TF/30
4.37
4.73
3.07
3.41
0.40
0.90
0.30
0.15
4.37
4.73
3.07
3.41
0.40
1.00
0.30
0.15
1/8
SMD1812 Series
Surface Mountable PTC Resettable Fuse
A
Model
B
C
D
E
Min
Max
Min
Max
Min
Max
Min
Min
SMD1812P075TF
4.37
4.73
3.07
3.41
0.40
0.90
0.30
0.15
SMD1812P075TF/24
4.37
4.73
3.07
3.41
0.50
1.20
0.30
0.15
SMD1812P075TF/33
4.37
4.73
3.07
3.41
0.60
1.20
0.30
0.15
SMD1812P110TF
4.37
4.73
3.07
3.41
0.40
0.90
0.30
0.15
SMD1812P110TF/16
4.37
4.73
3.07
3.41
0.40
0.90
0.30
0.15
SMD1812P110TF/24
4.37
4.73
3.07
3.41
0.60
1.30
0.30
0.15
SMD1812P110TF/33
4.37
4.73
3.07
3.41
0.70
1.70
0.30
0.15
SMD1812P125TF
4.37
4.73
3.07
3.41
0.50
1.20
0.30
0.15
SMD1812P125TF/16
4.37
4.73
3.07
3.41
0.30
0.90
0.30
0.15
SMD1812P150TF/8
4.37
4.73
3.07
3.41
0.30
0.90
0.30
0.15
SMD1812P150TF/16
4.37
4.73
3.07
3.41
0.50
1.20
0.30
0.15
SMD1812P150TF/24
4.37
4.73
3.07
3.41
0.80
1.70
0.30
0.15
SMD1812P160TF
4.37
4.73
3.07
3.41
0.30
0.80
0.30
0.15
SMD1812P200TFT
4.37
4.73
3.07
3.41
0.40
1.20
0.30
0.15
SMD1812P200TF/12
4.37
4.73
3.07
3.41
0.40
1.20
0.30
0.15
SMD1812P200TF/16
4.37
4.73
3.07
3.41
0.40
1.20
0.30
0.15
SMD1812P260TFT
4.37
4.73
3.07
3.41
0.50
1.50
0.30
0.15
SMD1812P260TF/12
4.37
4.73
3.07
3.41
0.60
1.50
0.30
0.15
SMD1812P260TF/16
4.37
4.73
3.07
3.41
0.80
1.70
0.30
0.15
SMD1812P300TFT
4.37
4.73
3.07
3.41
0.50
1.50
0.30
0.15
SMD1812P350TF
4.37
4.73
3.07
3.41
0.50
1.50
0.30
0.15
Thermal Derating Chart-IH(A)
Model
Maximum ambient operating temperatures(℃)
-40
-20
0
25
40
50
60
70
85
SMD1812P010TF
0.16
0.14
0.12
0.10
0.08
0.07
0.06
0.05
0.03
SMD1812P014TF
0.23
0.19
0.17
0.14
0.12
0.10
0.09
0.08
0.06
SMD1812P020TF
0.29
0.26
0.23
0.20
0.17
0.15
0.14
0.12
0.10
SMD1812P030TF
0.44
0.39
0.35
0.30
0.26
0.23
0.21
0.18
0.15
SMD1812P050TF
0.59
0.57
0.55
0.50
0.45
0.43
0.35
0.30
0.23
SMD1812P075TF
1.10
0.99
0.87
0.75
0.63
0.57
0.49
0.45
0.35
SMD1812P110TF
1.60
1.45
1.28
1.10
0.92
0.83
0.71
0.66
0.52
SMD1812P110TF/16
1.60
1.45
1.28
1.10
0.92
0.83
0.71
0.66
0.52
SMD1812P110TF/24
1.60
1.45
1.28
1.10
0.92
0.83
0.71
0.66
0.52
SMD1812P110TF/33
1.60
1.45
1.28
1.10
0.92
0.83
0.71
0.66
0.52
2/8
SMD1812 Series
Surface Mountable PTC Resettable Fuse
SMD1812P125TF
2.00
1.75
1.52
1.25
1.00
0.95
0.90
0.75
0.53
SMD1812P125TF/16
2.00
1.75
1.52
1.25
1.00
0.95
0.90
0.75
0.53
SMD1812P150TF/8
2.30
2.05
1.77
1.50
1.23
1.09
0.95
0.82
0.61
SMD1812P150TF/16
2.30
2.05
1.77
1.50
1.23
1.09
0.95
0.82
0.61
SMD1812P150TF/24
2.30
2.05
1.77
1.50
1.23
1.09
0.95
0.82
0.61
SMD1812P160TF
2.45
2.15
1.89
1.60
1.34
1.25
1.15
0.96
0.79
SMD1812P200TFT
2.89
2.61
2.30
2.00
1.75
1.66
1.45
1.39
1.19
SMD1812P200TF/12
2.89
2.61
2.30
2.00
1.75
1.66
1.45
1.39
1.19
SMD1812P200TF/16
2.89
2.61
2.30
2.00
1.75
1.66
1.45
1.39
1.19
SMD1812P260TFT
3.76
3.39
2.99
2.60
2.28
2.16
1.89
1.81
1.55
SMD1812P260TF/12
3.38
3.05
2.69
2.60
2.05
1.94
1.70
1.63
1.39
SMD1812P260TF/16
3.38
3.05
2.69
2.60
2.05
1.94
1.70
1.63
1.39
SMD1812P300TFT
4.34
3.92
3.45
3.00
2.63
2.49
2.18
2.09
1.79
SMD1812P350TF
5.06
4.57
4.03
3.50
3.06
2.91
2.54
2.43
2.08
Vmax
(Vdc)
Imax
(A)
Ihold
@25°C
(A)
Itrip
@25°C
(A)
Current
Time
Rimin
R1max
(A)
(Sec)
()
()
SMD1812P010TF
30.0
100
0.10
0.30
0.5
1.50
0.750
15.000
SMD1812P010TF/60
60.0
100
0.10
0.30
0.5
1.50
0.750
15.000
SMD1812P014TF/33
33.0
100
0.14
0.34
1.5
0.15
0.650
6.000
SMD1812P014TF
60.0
100
0.14
0.34
1.5
0.15
0.650
6.000
SMD1812P020TF
30.0
100
0.20
0.40
8.0
0.02
0.350
5.000
SMD1812P030TF
30.0
100
0.30
0.60
8.0
0.10
0.250
3.000
SMD1812P050TF
15.0
100
0.50
1.00
8.0
0.15
0.150
1.000
SMD1812P050TF/24
SMD1812P050TF/30
24.0
100
0.50
1.00
8.0
0.15
0.150
1.000
30.0
100
0.50
1.00
8.0
0.15
0.150
1.000
SMD1812P075TF
13.2
100
0.75
1.50
8.0
0.20
0.090
0.450
SMD1812P075TF/24
24
100
0.75
1.50
8.0
0.20
0.090
0.450
SMD1812P075TF/33
33
100
0.75
1.50
8.0
0.20
0.090
0.450
SMD1812P110TF
8.0
100
1.10
2.20
8.0
0.30
0.050
0.250
SMD1812P110TF/16
16.0
100
1.10
2.20
8.0
0.30
0.050
0.250
SMD1812P110TF/24
24.0
100
1.10
2.20
8.0
0.30
0.050
0.250
SMD1812P110TF/33
33.0
100
1.10
2.20
8.0
0.30
0.050
0.250
8.0
100
1.25
2.50
8.0
0.40
0.050
0.200
Electrical Characteristic
Model
SMD1812P125TF
3/8
Time to trip
R25
SMD1812 Series
Surface Mountable PTC Resettable Fuse
Time to trip
R25
Ihold
@25°C
(A)
Itrip
@25°C
(A)
Current
Time
Ri min
R1 max
(A)
(Sec)
( )
100
1.2 5
2.50
8.0
0.40
0.050
()
0.2 00
8.0
100
1.50
3.00
8.0
0.50
0.040
0.160
SMD1812P150TF/16
16.0
100
1.50
3.00
8.0
0.50
0.040
0.160
SMD1812P150TF/24
100
8.0
0.50
0.040
0.160
100
1.50
1.60
3.00
SMD1812P160TF
24.0
8.0
2.80
8. 0
1.00
0.030
0 .130
SMD1812P200TFT
8.0
100
2.00
4.00
8.0
2.00
0.020
0.100
SMD1812P200TF/12
12.0
100
2.00
4.00
8.0
2.00
0.020
0.100
SMD1812P200TF/16
100
2.00
2.00
0.020
0.100
100
2.60
4.00
5.00
8.0
SMD1812P260TFT
16.0
8.0
8.0
2.50
0.015
0.050
SMD1812P260TF/12
12.0
100
2.60
5.00
8.0
2.50
0.015
0.060
SMD1812P260TF/16
16.0
100
2.60
5.00
8.0
2.50
0.015
0.060
SMD1812P300TFT
6.0
100
3.00
5.00
8.0
4.00
0.012
0.040
Vmax
Imax
(Vdc)
(A)
SMD1812P125TF/16
16.0
SMD1812P150TF/8
Model
Test Procedures And Requirements
Test
Test Conditions
Accept/Reject Criteria
Resistance
In still air @ 25℃
Specified current,Vmax ,25℃
Rmin≤R≤R max
Tmaximum Time to Trip
Time to Trip
Hold Current
Trip Cycle Life
30min,at IH
No trip
Vmax,Imax,100cycles
No arcing or burning
Trip Endurance
Vmax,1 hours
No arcing or burning
4/8
SMD1812 Series
Surface Mountable PTC Resettable Fuse
Physical Characteristics and Environmental Specifications
Physical Characteristics
Terminal materials :
Tin-Plated Nickle-copper
Soldering
Meets EIA specification RS 186-9E and ANSI/J-STD-002 Category 3.
zone
Environmental Specifications
Test
Conditions
Resistance Change
Passive aging
85℃,1000hours
±10%
Humidity aging
85℃/85%RH.1000 hours
±5%
Thermal shock
MIL-STD-202,Method 107G
+85℃/-40℃,20times
-30% typical resistance change
Solvent Resistance
MIL-STD-202,Method 215
no change
Vibration
ML-STD-883C,Test Condition A
No chage
Electrical Specifications:
Ihold = Hold Current. Maximum current device will not trip in 25°C still air.
Itrip = Trip Current. Minimum current at which the device will always trip in 25°C still air.
Vmax = Maximum operating voltage device can withstand without damage at rated current (Imax).
Imax = Maximum fault current device can withstand without damage at rated voltage (Vmax).
Pd=Maximum power dissipation when device is in the tripped state in 25°C still air environment at rated voltage.
Rimin/max = Minimum/Maximum device resistance prior to tripping at 25°C.
R1max = Maximum device resistance is measured one hour post reflow.
5/8
SMD1812 Series
Surface Mountable PTC Resettable Fuse
Recommended pad layout (mm)
Solder reflow conditions
● Recommended 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 (0.010inch).
● Devices can be cleaned using standard industry methods and solvents.
● Soldering temprature profile meets RoHs leadfree process.
Notes: If reflow temperatures exceed the recommended profile, devices may not meet the performance requirements.
6/8
SMD1812 Series
Surface Mountable PTC Resettable Fuse
Tape Specification And
Reel Dimensions
Coverning Specifications
EIA 481-1(Unit:mm)
W
12.00+0.30/-0
P0
8.0 ± 0.10
P1
4.0± 0.10
P2
2.0 ± 0.10
A0
3.50 ± 0.10
B0
4.90 ± 0.10
D0
1.50+0.10/-0
F
5.50± 0.05
E1
1.75 ± 0.10
T
0.30± 0.10
Leader min.
390
Trailer min.
160
Reel Dimensions
A
178±1.0
N
59±1
W1
8.5+1.0/-0.2
W2
12.0±1
7/8
SMD1812 Series
Surface Mountable PTC Resettable Fuse
Storage
The maximum ambient temperature shall not exceed 38℃. Storage temperatures higher than 38℃ could result in the
deformation of packaging materials. The maximum relative humidity recommended for storage is 60%. High humidity with
high temperature can accelerate the oxidation of the solder plating on the termination and reduce the solderability of the
comp on ents. Sealed plastic bags with desiccant sha ll be used t o reduce th e oxidatio n of th e terminatio n an d sh all o nly be
opened prior to use. The products shall not be stored in areas where harmful gases containing sulfur or chlorine are present
WARNING
• Use PPTC beyond the maximum ratings or improper use may result in device damage and possible electrical arcing and
flame.
• PPTC are intended for protection against occasional over current or over temperature fault conditions and should not be
used when repeated fault conditions or prolonged trip events are anticipated.
• Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended
electronic, thermal, and mechanical procedures for electronic components.
• Use PPTC with a large inductance in circuit will generate a circuit voltage (L di/dt) above the rated voltage of the PPTC.
• Avoid impact PPTC device its thermal expansion like placed under pressure or installed in limited space.
• Contamination of the PPTC material with certain silicon based oils or some aggressive solvents can adversely impact the
performance of the devices.PPTC SMD can be cleaned by standard methods.
• Requests that customers comply with our recommended solder pad layouts and recommended reflow profile. Improper
board layouts or reflow profilecould negatively impact solderability performance of our devices.
8/8
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