PolySwitch® Resettable PPTCs
Surface Mount > SMD Series
SMD Series
RoHS
Description
The SMD series provides surface mount overcurrent
protection for applications where space is at a premium
and resettable protection is desired.
Features
• Broadest range of resettable devices available in industry
• Low resistance
• Small footprint - 2018, 2920 and 3425
• Fast time-to-trip
• RoHS complaint, lead-free and halogen-free
Agency Approvals
AGENCY
Applications
AGENCY FILE NUMBER
Mobile Electronics and Batteries
E74889
78165
72161778
72161795
• Computer
• Telephone and broadband
• Portable electronics
• Automotive
• Multimedia
• Industrial controls
• Game machines
• Battery
Additional Information
Datasheet
Samples
Resources
Electrical Characteristics
Part
Number
IH
IT
(A)
(A)
VMAX
IMAX
PD MAX
(VDC)
(A)
(W)
Max Time-to-trip
RMIN
R1MAX
(A)
(s)
(Ω)
(Ω)
midSMD Series — Size 5050mm/2018mils
SMD030F-2018
0.30
0.80
60
20
1.50
1.50
1.50
0.500
2.30
SMD100F-2018
1.10
2.20
15
40
1.40
8.00
0.50
0.100
0.40
SMD150F-2018
1.50
3.00
15
40
1.80
8.00
1.00
0.070
0.18
SMD200F-2018
2.00
4.20
6
40
1.50
8.00
3.00
0.048
0.10
SMD Series — Size 7555mm/2920mils
SMD030F
0.30
0.60
60
10
1.70
1.50
3.00
1.200
4.800
SMD050F
0.50
1.00
60
10
1.70
2.50
4.00
0.350
1.400
SMD075F
0.75
1.50
30
40
1.70
8.00
0.30
0.350
1.000
SMD075F/60
0.75
1.50
60
10
1.70
8.00
0.30
0.350
1.000
Notes:
IH
: Hold current: maximum current device will pass without interruption in 20°C still air.
IT
: Trip current: minimum current that will switch the device from low resistance to high resistance in 20°C still air.
VMAX : Maximum continuous voltage device can withstand without damage at rated current.
IMAX : Maximum fault current device can withstand without damage at rated voltage.
PD
: Power dissipated from device when in the tripped state in 20°C still air.
RMIN : Minimum resistance of device as supplied at 20°C unless otherwise specified.
R1MAX : Maximum resistance measured one hour post-trip or post-reflow at 20°C.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19
PolySwitch® Resettable PTCs
Surface Mount > SMD Series
Electrical Characteristics
(Cont’d)
Part
Number
IH
IT
VMAX
IMAX
PD MAX
(A)
(A)
(VDC)
(A)
(W)
Max Time-to-trip
RMIN
R1MAX
(A)
(s)
(Ω)
(Ω)
SMD100F
1.10
2.20
30
40
1.70
8.00
0.50
0.120
0.480
SMD100F/33
1.10
2.20
33
SMDH120
1.20
2.30
16
40
1.70
8.00
0.50
0.120
0.410
50
2.00
8.00
2.00
0.150
0.340
SMD Series — Size 7555mm/2920mils
SMD125F
1.25
2.50
15
40
1.70
8.00
2.00
0.070
0.250
SMD150F/33-2920
1.50
3.00
33
40
1.50
8.00
5.00
0.080
0.230
SMD200F/24-2920
2.00
4.00
24
40
1.50
8.00
5.00
0.050
0.125
SMD250F/15-2920
2.50
5.00
15
40
1.50
8.00
10.00
0.035
0.085
SMD260F
2.60
5.20
6
40
1.70
8.00
20.00
0.025
0.075
SMD300F
3.00
6.00
6
40
1.50
8.00
35.00
0.015
0.048
SMD300F/15
3.00
6.00
15
40
1.50
8.00
35.00
0.015
0.050
SMD2 Series — Size 8763mm/3425mils
SMD150F
1.50
3.00
15
40
1.90
8.00
5.00
0.060
0.250
SMD150F/33
1.50
3.00
33
40
1.90
8.00
5.00
0.080
0.230
SMDH160
1.60
3.20
16
70
2.20
8.00
15.00
0.050
0.150
SMD185F
1.85
3.60
33
40
1.50
8.00
5.00
0.065
0.165
SMD200F
2.00
4.00
15
40
1.90
8.00
12.00
0.050
0.125
SMD250F
2.50
5.00
15
40
1.90
8.00
25.00
0.035
0.085
Notes:
IH
: Hold current: maximum current device will pass without interruption in 20°C still air.
IT
: Trip current: minimum current that will switch the device from low resistance to high resistance in 20°C still air.
VMAX : Maximum continuous voltage device can withstand without damage at rated current.
IMAX : Maximum fault current device can withstand without damage at rated voltage.
PD
: Power dissipated from device when in the tripped state in 20°C still air.
RMIN : Minimum resistance of device as supplied at 20°C unless otherwise specified.
R1MAX : Maximum resistance measured one hour post-trip or post-reflow at 20°C.
Temperature Rerating Curve
A = midSMD, SMD, SMD2
B = SMDH120, SMDH160
200
% of Rated Hold and Trip Current
180
160
140
A
B
120
100
80
60
A
40
B
20
0
-40
-20
0
20
40
60
Ambient Temperature (°C)
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19
80
100
120
PolySwitch® Resettable PPTCs
Surface Mount > SMD Series
Temperature Rerating
Maximum Ambient Temperature
Part Number
-40°C
-20°C
0°C
20°C
25°C
40°C
50°C
60°C
70°C
80°C
85°C
125°C
Hold Current (A)
midSMD Series — Size 5050mm/2018mils
SMD030F-2018
0.48
0.42
0.35
0.30
0.28
0.24
0.21
0.17
0.15
0.12
0.10
—
SMD100F-2018
1.59
1.43
1.20
1.10
1.03
0.94
0.85
0.72
0.69
0.61
0.57
—
SMD150F-2018
2.21
1.97
1.70
1.50
1.43
1.26
1.15
1.00
0.91
0.79
0.73
—
SMD200F-2018
2.81
2.54
2.27
2.00
1.93
1.73
1.59
1.46
1.32
1.19
1.12
—
SMD Series — Size 7555mm/2920mils
SMD030F
0.44
0.39
0.32
0.30
0.28
0.26
0.23
0.19
0.18
0.17
0.15
—
SMD050F
0.73
0.65
0.55
0.50
0.47
0.43
0.39
0.33
0.31
0.28
0.26
—
SMD075F
1.11
0.99
0.84
0.75
0.71
0.63
0.57
0.49
0.45
0.39
0.36
—
SMD075F/60
1.11
0.99
0.84
0.75
0.71
0.63
0.57
0.49
0.45
0.39
0.36
—
SMD100F
1.59
1.43
1.20
1.10
1.03
0.94
0.85
0.72
0.69
0.61
0.57
—
SMD100F/33
1.48
1.35
1.20
1.10
1.06
0.98
0.91
0.83
0.79
0.73
0.69
—
SMDH120
2.34
1.96
1.58
1.20
1.15
1.02
0.92
0.83
0.74
0.65
0.60
0.26
SMD125F
1.89
1.68
1.50
1.25
1.21
1.04
0.93
0.85
0.71
0.61
0.55
—
SMD150F/33-2920
2.27
2.01
1.76
1.50
1.44
1.25
1.12
0.99
0.86
0.74
0.67
—
SMD200F/24-2920
2.90
2.60
2.30
2.00
1.93
1.70
1.55
1.40
1.25
1.10
1.03
—
SMD250F/15-2920
3.65
3.25
2.80
2.50
2.33
2.02
1.82
1.60
1.41
1.20
1.11
—
SMD260F
3.82
3.41
2.90
2.60
2.45
2.19
1.99
1.70
1.58
1.38
1.28
—
SMD300F
4.13
3.75
3.30
3.00
2.87
2.62
2.43
2.25
2.00
1.87
1.78
—
SMD300F/15
4.20
3.80
3.30
3.00
2.90
2.62
2.43
2.25
2.00
1.87
1.78
—
SMD2 Series — Size 8763mm/3425mils
SMD150F
2.30
2.04
1.80
1.50
1.45
1.23
1.10
0.99
0.83
0.70
0.63
—
SMD150F/33
2.30
2.04
1.80
1.50
1.45
1.23
1.10
0.99
0.83
0.70
0.63
—
SMDH160
2.14
1.96
1.78
1.60
1.56
1.42
1.33
1.24
1.15
1.06
1.02
0.44
SMD185F
2.54
2.29
2.20
1.85
1.80
1.55
1.43
1.31
1.19
1.06
1.00
—
SMD200F
3.01
2.67
2.30
2.00
1.90
1.66
1.50
1.30
1.16
0.99
0.91
—
SMD250F
3.72
3.31
2.80
2.50
2.35
2.09
1.89
1.60
1.48
1.28
1.18
—
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19
PolySwitch® Resettable PTCs
Surface Mount > SMD Series
Typical Time-to-Trip Curves at 20°C
midSMD
A = SMD030F-2018
B = SMD100F-2018
C = SMD150F-2018
D = SMD200F-2018
100
A
C
B
D
Time-to-Trip (s)
10
1
0.1
B
0.01
0.1
C
D
A 10
1
100
Fault Current (A)
100
B C
G
F
D
E
K
J
H I
A
10
Time-to-Trip (s)
SMDxxxF
A = SMD030F
B = SMD050F
C = SMD075F, SMD075F/60
D = SMD100F, SMD100F/33
E = SMDH120
F = SMD150F/33-2920
G = SMD125F
H = SMD200F/24-2920
I = SMD250F/15-2920
J = SMD260F
K = SMD300F, SMD300F/15
1
I
K
0.1
J
A
C
G
D F
E
B
0.01
0.1
1
10
H
100
Fault Current (A)
D
100
A
C
E
B
10
Time-to-Trip (s)
SMD2xxxF
A = SMD150F, SMD150F/33
B = SMDH160
C = SMD185F
D = SMD200F
E = SMD250F
1
0.1
D
B C E
0.01
A
1
10
Fault Current (A)
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19
100
PolySwitch® Resettable PPTCs
Surface Mount > SMD Series
Physical Specifications
Terminal Pad Material
Soldering Characteristics
100% Matte Tin with Nickel Underplate
ANSI/J-STD-002 Category 3 (midSMD)
ANSI/J-STD-002 Category 1 (SMD, SMD2)
Solder Heat Withstand
per IEC-STD 68-2-20, Test Tb, Section 5, Method 1a
Flammability Resistance
per IEC 695-2-2 Needle Flame Test for 20 seconds
Environmental Specifications
Test
Test Method
Storage Life
PS300, Section 5.3.2
Humidity Aging
PS300, Section 5.3.1
Thermal Shock
MIL-STD-202, Method 107G
Vibration
MIL-STD-883C
Solvent Resistance
PS300, Section 5.2.2
Conditions
Resistance Change
60°C, 1000 hrs
±3% typ
85°C, 1000 hrs
±3% typ
85°C, 85% R.H., 100 hrs
±1.2% typ
85°C, -40°C (20 Times)
-33% typ
125°C, -55°C (10 Times)
-33% typ
per MIL-STD-883C
No Change
Freon
No Change
Trichloroethane
No Change
Hydrocarbons
No Change
Moisture Resistance Level
Level 2a, J-STD-020
Storage Conditions
40°C max, 70% RH max; devices should remain in original sealed bags prior to use.
Devices may not meet specified values if these storage conditions are exceeded.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19
PolySwitch® Resettable PTCs
Surface Mount > SMD Series
Dimension Figures
B
B
A
A
C
C
C
C
FF
D
D
D
D
H
H
B
B
EE
A
A
D
D
EE
G
G
B
B
Figure 1
FF
EE
A
A
Figure 2
Dimensions
Dimensions in Millimeters (Inches)
Part Number
A
Min
B
Max
Min
C
Max
Min
D
Max
Min
E
Max
Min
F
Max
Min
G
Max
H
Min
Max
Min
Figure
midSMD Series — Size 5050mm/2018mils
SMD030F-2018
4.72
5.44
(0.186) (0.214)
—
1.78
4.22
4.93
0.25
0.36
0.25
0.36
0.30
0.46
(0.070) (0.166) (0.194) (0.010) (0.014) (0.010) (0.014) (0.012) (0.018)
—
—
—
1
SMD100F-2018
4.72
5.44
(0.186) (0.214)
—
1.52
4.22
4.93
0.25
0.36
0.25
0.36
0.30
0.46
(0.060) (0.166) (0.194) (0.010) (0.014) (0.010) (0.014) (0.012) (0.018)
—
—
—
1
SMD150F-2018
4.72
5.44
(0.186) (0.214)
—
1.52
4.22
4.93
0.25
0.36
0.25
0.36
0.30
0.46
(0.060) (0.166) (0.194) (0.010) (0.014) (0.010) (0.014) (0.012) (0.018)
—
—
—
1
SMD200F-2018
4.72
5.44
(0.186) (0.214)
—
1.52
4.22
4.93
0.25
0.36
0.25
0.36
0.30
0.46
(0.060) (0.166) (0.194) (0.010) (0.014) (0.010) (0.014) (0.012) (0.018)
—
—
—
1
SMD030F
6.73
7.98
(0.265) (0.314)
—
3.18
(0.125)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD050F
6.73
7.98
(0.265) (0.314)
—
3.18
(0.125)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD075F
6.73
7.98
(0.265) (0.314)
—
3.18
(0.125)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD075F/60
6.73
7.98
(0.265) (0.314)
—
3.18
(0.125)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD100F
6.73
7.98
(0.265) (0.314)
—
3.00
(0.118)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD100F/33
6.73
7.98
(0.265) (0.314)
—
3.00
(0.118)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMDH120
6.73
7.98
(0.265) (0.314)
—
3.00
(0.118)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD125F
6.73
7.98
(0.265) (0.314)
—
3.00
(0.118)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD Series — Size 7555mm/2920mils
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19
PolySwitch® Resettable PPTCs
Surface Mount > SMD Series
Dimension Figures
B
B
A
A
C
C
C
C
H
H
B
B
FF
D
D
EE
A
A
B
B
D
D
EE
A
A
Figure 1
G
G
FF
EE
Figure 2
Dimensions (Cont’d)
Dimensions in Millimeters (Inches)
Part Number
A
Min
B
Max
Min
C
Max
Min
D
Max
Min
E
Max
Min
F
Max
Min
G
Max
Min
H
Max
Figure
Min
SMD Series — Size 7555mm/2920mils
SMD150F/33-2920
6.73
7.98
(0.265) (0.314)
—
3.00
(0.118)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD200F/24-2920
6.73
7.98
(0.265) (0.314)
—
3.00
(0.118)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD250F/15-2920
6.73
7.98
(0.265) (0.314)
—
3.00
(0.118)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD260F
6.73
7.98
(0.265) (0.314)
—
3.00
(0.118)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD300F
6.73
7.98
(0.265) (0.314)
—
3.00
(0.118)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD300F/15
6.73
7.98
(0.265) (0.314)
—
3.00
(0.118)
4.80
(0.19)
5.44
0.56
0.71
0.56
0.71
2.16
2.41
0.66
1.37
0.43
(0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
2
SMD2 Series — Size 8763mm/3425mils
SMD150F
8.00
(0.315)
9.40
(0.370)
—
3.00
6.00
6.71
0.56
(0.118) (0.236) (0.264) (0.022)
0.71
0.56
0.71
3.68
3.94
0.66
1.37
0.43
(0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017)
SMD150F/33
8.00
(0.315)
9.40
(0.370)
—
3.00
6.00
(0.118) (0.236)
6.71
0.56
0.71
0.56
0.71
3.68
3.94
0.66
1.37
(0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054)
0.43
(0.017)
2
SMDH160
8.00
9.40
(0.315) (0.370)
—
3.00
6.00
(0.118) (0.236)
6.71
0.56
(0.264) (0.022)
0.43
(0.017)
2
SMD185F
8.00
9.40
(0.315) (0.370)
—
3.00
6.00
(0.118) (0.236)
6.71
0.56
0.71
0.56
0.71
3.68
(0.264) (0.022) (0.028) (0.022) (0.028) (0.145)
1.37
0.43
(0.054) (0.017)
2
SMD200F
8.00
9.40
(0.315) (0.370)
—
3.00
6.00
(0.118) (0.236)
6.71
0.56
(0.264) (0.022)
0.71
0.56
0.71
3.68
3.94
0.66
1.37
(0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054)
0.43
(0.017)
2
SMD250F
8.00
9.40
(0.315) (0.370)
—
3.00
6.00
(0.118) (0.236)
6.71
0.56
0.71
0.56
0.71
3.68
3.94
0.66
1.37
(0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054)
0.43
(0.017)
2
0.71
0.56
0.71
3.68
3.94
0.66
1.37
(0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054)
3.94
0.66
(0.155) (0.026)
2
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19
PolySwitch® Resettable PTCs
Surface Mount > SMD Series
Recommended Pad Layout
A
B
C
B
Packaging and Marking Information
Recommended Pad Layout Figures
[mm (in)]
Part
Number
Tape and Reel
Quantity
Standard
Package
Part
Marking
Dimension A
(Nom)
Dimension B
(Nom)
Dimension C
(Nom)
Agency
Recognition
midSMD Series — Size 5050mm/2018mils
SMD030F-2018
4,000
20,000
A03F
4.60 (0.18)
1.50 (0.059)
3.40 (0.134)
UL, CSA, TÜV
SMD100F-2018
4,000
20,000
A10F
4.60 (0.18)
1.50 (0.059)
3.40 (0.134)
UL, CSA, TÜV
SMD150F-2018
4,000
20,000
A15F
4.60 (0.18)
1.50 (0.059)
3.40 (0.134)
UL, CSA, TÜV
SMD200F-2018
4,000
20,000
A20F
4.60 (0.18)
1.50 (0.059)
3.40 (0.134)
UL, CSA, TÜV
SMD Series — Size 7555mm/2920mils
SMD030F
2,000
10,000
030F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD050F
2,000
10,000
050F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD075F
2,000
10,000
075F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD075F/60
2,000
10,000
756F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD100F
2,000
10,000
100F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD100F/33
2,000
10,000
103F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMDH120
2,000
10,000
H12
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD125F
2,000
10,000
125F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD150F/33-2920
2,000
10,000
S15F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD200F/24-2920
2,000
10,000
S20F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD250F/15-2920
2,000
10,000
S25F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD260F
2,000
10,000
260F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD300F
2,000
10,000
300F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD300F/15
2,000
10,000
315F
3.10 (0.12)
2.30 (0.09)
5.10 (0.201)
UL, CSA, TÜV
SMD2 Series — Size 8763mm/3425mils
SMD150F
1,500
7,500
150F
4.60 (0.18)
2.30 (0.09)
6.10 (0.240)
UL, CSA, TÜV
SMD150F/33
1,500
7,500
153F
4.60 (0.18)
2.30 (0.09)
6.10 (0.240)
UL, CSA, TÜV
SMDH160
1,500
7,500
160F
4.60 (0.18)
2.30 (0.09)
6.10 (0.240)
UL, CSA, TÜV
SMD185F
1,500
7,500
185F
4.60 (0.18)
2.30 (0.09)
6.10 (0.240)
UL, CSA, TÜV
SMD200F
1,500
7,500
200F
4.60 (0.18)
2.30 (0.09)
6.10 (0.240)
UL, CSA, TÜV
SMD250F
1,500
7,500
250F
4.60 (0.18)
2.30 (0.09)
6.10 (0.240)
UL, CSA, TÜV
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19
PolySwitch® Resettable PPTCs
Surface Mount > SMD Series
Solder Reflow Recommendations
Profile Feature
Pb-Free Assembly
Average ramp up rate (TsMAX to Tp)
3°C/s max
Preheat
150°C
• Temperature max (TsMAX)
200°C
• Time (tsMIN to tsMAX)
60-120 s
Time maintained above:
• Temperature (TL)
217°C
• Time (tL)
60-150 s
Peak/Classification temperature (Tp)
260°C
Temperature
TL
• Temperature min (TsMIN)
tp
Tp
Critical Zone
TL to Tp
Ramp Up
tL
TsMAX
TsMIN
ts
Preheat
25
Reflow Profile
Ramp Down
t 25˚C to Peak
Time
Time within 5°C of actual peak temperature
Time (tp)
30 s max
Ramp down rate
3°C/s max
Time 25°C to peak temperature
8 min max
Note: All temperatures refer to topside of the package, measured on the package body
surface.
Solder Reflow
• Recommended reflow method: IR, hot air, nitrogen.
• Recommended maximum paste thickness: 0.25mm (0.010in)
• Devices can be cleaned using standard methods and aqueous solvents.
• Experience has shown the optimum conditions for forming acceptable solder fillets occur when a reasonable amount of solder paste is
placed underneath each device’s termination. As such, we request that customers comply with our recommended solder pad layouts.
• Customer should validate that the solder paste amount and reflow recommendations meet its application.
• We request that customer board layouts refrain from placing raised features (e.g. vias, nomenclature, traces, etc.) underneath PolySwitch
devices. It is possible that raised features could negatively impact solderability performance of our devices.
Rework
• Standard industry practices. (Please also avoid direct contact to the device.)
Part Ordering Number System
SMD 150 F /33
-2920
-2
Packaging
2 = Tape and Reel
Footprint
Alternative Voltage Rating (If Applicable)
Lead Free
Hold Current Indicator
Product Series
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19
PolySwitch® Resettable PTCs
Surface Mount > SMD Series
Tape and Reel Specifications
midSMD
EIA 481-2
SMD
EIA 481-2
SMD030F
SMD050F
SMD075F
SMD075F/60
SMD100F
SMD100F/33
SMDH120
SMD125F
SMD150F/33-2920
SMD200F/24-2920
SMD250F/15-2920
SMD260F
SMD300F
SMD300F/15
SMD2
EIA 481-2
SMD150F
SMD150F/33
SMDH160
SMD185F
SMD200F
SMD250F
Description
SMD030F-2018
SMD100F-2018
SMD150F-2018
SMD200F-2018
W
16.0 ± 0.30
16.0 ± 0.30
16.0 ± 0.30
P0
4.0 ± 0.10
4.0 ± 0.10
4.0 ± 0.10
P1
8.0 ± 0.10
8.0 ± 0.10
12.0 ± 0.10
P2
2.0 ± 0.10
2.0 ± 0.10
2.0 ± 0.10
A0
5.11 ± 0.15
5.6 ± 0.23
6.9 ± 0.23
B0
5.6 ± 0.23
8.1 ± 0.15
9.6 ± 0.15
B1 max
6.4
12.1
12.1
D0
1.5 + 0.10/ -.00
1.5 + 0.10/ -.00
1.5 + 0.10/ -.00
F
7.50 ± 0.10
7.50 ± 0.10
7.50 ± 0.10
E1
1.75 ± 0.10
1.75 ± 0.10
1.75 ± 0.10
E2 min
14.25
14.25
14.25
T max
0.4
0.4
0.4
T1 max
0.1
0.1
0.1
K0
1.8 ± 0.15
3.2 ± 0.15
3.4 ± 0.15
A max
330
330
330
N min
50
50
50
W1
16.4 + 2.0/-.00
16.4 + 2.0/-.00
16.4 + 2.0/-.00
W2 max
22.4
22.4
22.4
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19
PolySwitch® Resettable PPTCs
Surface Mount > SMD Series
Tape and Reel Diagrams
T
P0
Cover Tape
D0
P2
E1
F
B1
K0
W
E2
B0
T1
A0
Embossment
P1
Center lines
of cavity
Figure 1
W2 (Measured at Hub)
Cover Tape
A
N (Hub Dia.)
W1 (Measured at Hub)
Carrier Tape
Embossed Cavity
Figure 2
WARNING
• Users should independently evaluate the suitability of and test each product selected for their own application.
• Operation beyond the maximum ratings or improper use may result in device damage and possible electrical arcing and flame.
• These devices are intended for protection against damage caused by occasional overcurrent or overtemperature fault conditions and should not be used when
repeated fault conditions or prolonged trip events are anticipated.
• Contamination of the PPTC material with certain silicone-based oils or some aggressive solvents can adversely impact the performance of the devices.
• Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended electronic, thermal, and mechanical
procedures for electronic components.
• PPTC devices are not recommended for installation in applications where the device is constrained such that its PTC properties are inhibited, for example in rigid
potting materials or in rigid housings, which lack adequate clearance to accommodate device expansion.
• Operation in circuits with a large inductance can generate a circuit voltage (Ldi/dt) above the rated voltage of the device.
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each
product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2019 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 07/11/19