Page 1
Terminal SMD and SMDC Series
Surface Mount
PolySwitch® Resettable PPTC Datasheet
RoHS
Description
The SMD series provides surface mount overcurrent protection for
applications where space is at a premium and resettable protection
is desired.
Features & Benefits
Web Resources
Download ECAD models, order samples, and find
technical recources at www.littelfuse.com
■ Broadest range of resettable
devices available in industry
■ Low resistance
■ Small footprint - 2018, 2920
and 3425
Applications
Mobile Electronics and Batteries
■ Computer
■ Portable electronics
■ Multimedia
■ Game machines
Agency Agency File Number
Electrical Characteristics
■ Fast time-to-trip
■ RoHS complaint, lead-free
and halogen-free
■ Telephone and broadband
■ Automotive
■ Industrial controls
■ Battery
Agency Approvals
E74889
78165
50253253
72161793
72161779
72161795
Part
Number
Ordering
Part Number
I
H
(A) (A) (VDC) (A) (W) (A) (s) (Ω) (Ω)
I
T
V
MAX
I
MAX
P
D MAX
Max Time-to-trip R
MIN
Size 2018
SMD030F-2018 RF0323-000 0.30 0.80 60 20 1.50 1.50 1.50 0.500 2.30
decaSMDC050F/60 RF1342-000 0.55 1. 10 60 10 1. 0 0 8.00 0.10 0.200 1. 10
SMD100F-2018 RF0324-000 1.10 2.20 15 40 1.40 8.00 0.50 0.100 0.40
SMD150F-2018 RF0325-000 1.50 3.00 15 40 1.80 8.00 1. 0 0 0.070 0.18
SMD200F-2018 RF0326-000 2.00 4.20 6 40 1.50 8.00 3.00 0.048 0.10
Size 2920
SMD030F RF0314-000 0.30 0.60 60 10 1.70 1.50 3.00 1.200 4.800
SMDC030F RF4438-000 0.30 0.60 60 10 1.50 1.50 3.00 0.300 3.400
SMD050F RF0315-000 0.50 1.0 0 60 10 1.70 2.50 4.00 0.350 1.400
SMDC050F RF4439-000 0.50 1. 0 0 60 10 1.50 2.50 4.00 0.150 1.200
SMD075F RF0316-000 0.75 1.50 30 40 1.70 8.00 0.30 0.350 1.000
SMDC075F RF4441-000 0.75 1.50 33 40 1.50 8.00 0.30 0.100 0.610
SMD075F/60 RF0317-000 0.75 1.50 60 10 1.70 8.00 0.30 0.350 1.000
Notes:
: Hold current: maximum current device will pass without interruption in 20°C still air.
I
H
: Trip current: minimum current that will switch the device from low resistance to high resistance in
I
T
20°C still air.
V
: Maximum continuous voltage device can withstand without damage at rated current.
MAX
I
: Maximum fault current device can withstand without damage at rated voltage.
MAX
: Power dissipated from device when in the tripped state in 20°C still air.
P
D
: Minimum resistance of device as supplied at 20°C unless otherwise specified.
R
MIN
: Maximum resistance measured one hour post-trip or post-reflow at 20°C.
R
1MAX
1
Specifications are subject to change without notice.
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24
R
1MAX
Page 2
Terminal SMD and SMDC Series
Surface Mount
Electrical Characteristics (Cont’d)
PolySwitch® Resettable PPTC Datasheet
Part
Number
Ordering
Part Number
I
H
(A) (A) (VDC) (A) (W) (A) (s) (Ω) (Ω)
I
T
V
MAX
I
MAX
P
D MAX
Max Time-to-trip R
MIN
R
1MAX
Size 2920
SMD100F RF0318-000 1. 10 2.20 30 40 1.70 8.00 0.50 0.120 0.480
SMD100F/33 RF0319-000 1. 10 2.20 33 40 1.70 8.00 0.50 0.120 0.410
SMDH120 RF1478-000 1.20 2.30 16 50 2.00 8.00 2.00 0.150 0.340
SMD125F RF0320-000 1.25 2.50 15 40 1.70 8.00 2.00 0.070 0.250
SMDC125F/33 RF4298-000 1.25 2.50 33 40 1.50 8.00 2.00 0.040 0.250
SMD150F/33-2920 RF2285-000 1.50 3.00 33 40 1.50 8.00 5.00 0.080 0.230
SMDC185F/33 RF3182-000 1.85 3.70 33 40 1.70 8.00 2.50 0.050 0,150
SMD200F/24-2920 RF2286-000 2.00 4.00 24 40 1.50 8.00 5.00 0.050 0.125
SMD250F/15-2920 RF2287-000 2.50 5.00 15 40 1.50 8.00 10.00 0.035 0.085
SMD260F RF0321-000 2.60 5.20 6 40 1.70 8.00 20.00 0.025 0.075
SMD300F RF0322-000 3.00 6.00 6 40 1.50 8.00 35.00 0.015 0.048
SMD300F/15 RF1835 - 000 3.00 6.00 15 40 1.50 8.00 35.00 0.015 0.050
SMDC300F/24 RF3102-000 3.00 6.00 24 40 1.70 8.00 5.00 0.015 0.072
SMDC310F/18 RF3763-000 3.10 6.00 18 50 1.50 8.00 25.00 0.013 0.036
Size 3425
SMD150F RF0308-000 1.50 3.00 15 40 1.90 8.00 5.00 0.060 0.250
SMD150F/33 RF0311-000 1.50 3.00 33 40 1.90 8.00 5.00 0.080 0.230
SMDH160 RF1479-000 1.60 3.20 16 70 2.20 8.00 15.00 0.050 0.150
SMD185F RF1238-000 1.85 3.60 33 40 1.50 8.00 5.00 0.065 0.165
SMD200F RF0312-000 2.00 4.00 15 40 1.90 8.00 12.00 0.050 0.125
SMD250F RF0313-000 2.50 5.00 15 40 1.90 8.00 25.00 0.035 0.085
Notes:
: Hold current: maximum current device will pass without interruption in 20°C still air.
I
H
: Trip current: minimum current that will switch the device from low resistance to high resistance in
I
T
20°C still air.
V
: Maximum continuous voltage device can withstand without damage at rated current.
MAX
Temperature Rerating Curve
% of Rated Hold and Trip Current
200
180
160
140
120
100
80
60
40
20
A
B
0
A = decaSMDC / SMDC and SMD
B = SMDH120, SMDH160
I
: Maximum fault current device can withstand without damage at rated voltage.
MAX
: Power dissipated from device when in the tripped state in 20°C still air.
P
D
: Minimum resistance of device as supplied at 20°C unless otherwise specified.
R
MIN
: Maximum resistance measured one hour post-trip or post-reflow at 20°C.
R
1MAX
A
-40 -20 0 20 40 60 80 100 120
Ambient Temperature (°C)
B
2
Specifications are subject to change without notice.
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24
Page 3
PolySwitch® Resettable PPTC Datasheet
Terminal SMD and SMDC Series
Surface Mount
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)
Size 2018
SMD030F-2018 0.48 0.42 0.35 0.30 0.28 0.24 0.21 0.17 0.15 0.12 0.10 —
decaSMDC050F/60 1. 0 0 0.85 0.70 0.55 0.53 0.45 0.40 0.35 0.30 0.25 0.23 —
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. 0 0 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. 1 9 1.12 —
Size 2920
SMD030F 0.44 0.39 0.32 0.30 0.28 0.26 0.23 0.19 0.18 0.17 0.15 —
SMDC030F 0.49 0.43 0.37 0.31 0.30 0.25 0.22 0.19 0,16 0,14 0,12 —
SMD050F 0.73 0.65 0.55 0.50 0.47 0.43 0.39 0.33 0.31 0.28 0.26 —
SMDC050F 0.86 0.75 0.65 0.54 0.50 0.43 0.37 0.32 0.26 0.22 0.28 —
SMD075F 1. 11 0.99 0.84 0.75 0.71 0.63 0.57 0.49 0.45 0.39 0.36 —
SMDC075F 1. 1 7 1.04 0.90 0.77 0.75 0.64 0.57 0.50 0.44 0.32 0.34 —
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. 1 5 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 —
SMDC125F/33 2.02 1.78 1.55 1.31 1.25 1.08 0.96 0.84 0.72 0.60 0.54 —
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 —
SMDC185F/33 2.83 2.50 2.20 1.85 1. 74 1.53 1.37 1.22 1.04 0.88 0.80 —
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 —
SMDC300F/24 4.70 4.19 3.70 3.17 3.00 2.66 2.41 2.20 1.90 1.65 1.50 —
SMDC310F/18 4.50 4.06 3.78 3.19 3.10 2.75 2.54 2.32 2.10 1.88 1. 7 6 —
Size 3425
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. 0 0 —
SMD200F 3.01 2.67 2.30 2.00 1.90 1.66 1.50 1.30 1. 1 6 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. 1 8 —
3
Specifications are subject to change without notice.
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24
Page 4
Terminal SMD and SMDC Series
Surface Mount
Typical Time-to-Trip Curves at 20°C
PolySwitch® Resettable PPTC Datasheet
Size 2018
A = SMD030F-2018
B = decaSMDC050F/60
C = SMD100F-2018
D = SMD150F-2018
E = SMD200F-2018
Size 2920
A = SMD030F
B = SMDC030F
C = SMD050F
D = SMDC050F
E = SMD075F, SMD075F/60
F = SMDC075F
G = SMD100F, SMD100F/33
H = SMDH120
I = SMD125F
J = SMDC125F/33
K = SMD150F/33-2920
L = SMDC185F/33
M = SMD200F/24-2920
N = SMD250F/15-2920
O = SMD260F
P = SMD300F,SMD300F/15
Q = SMDC300F/24
R = SMDC310F/18
AAB
10
1
0.1
0.01
0.1
100
10
1
0,1
Time-to-trip (s)
0,01
0,001
0,1110 100
AB
C
D
D
E
C
Fault Current (A)
I
N
K
M
G
H
Fault Current (A)
B
10
P
E
D
C
F
R
Q
J
Size 3425
100
10
C
A
E
B
A = SMD150F, SMD150F/33
B = SMDH160
C = SMD185F
1
D = SMD200F
E = SMD250F
Note: 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.
0.1
D
E
B
C
0.01
1 10
10
Fault Current (A)
4
A
Specifications are subject to change without notice.
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24
Page 5
Terminal SMD and SMDC Series
Surface Mount
Physical Specifications
Terminal Pad Material 100% Matte Tin with Nickel Underplate
PolySwitch® Resettable PPTC Datasheet
Soldering Characteristics
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
ANSI/J-STD-002 Category 3 (midSMD)
ANSI/J-STD-002 Category 1 (SMD, SMD2)
Environmental Specifications
Test Test Method Conditions Resistance Change
Storage Life
Humidity Aging
Thermal Shock
Vibration
Solvent Resistance
Moisture Resistance Level
PS300, Section 5.3.2
PS300, Section 5.3.1 85°C, 85% R.H., 100 hrs ±1.2% typ
MIL-STD-202, Method 107G
MIL-STD-883C per MIL-STD-883C No Change
PS300, Section 5.2.2
Level 2a, J-STD-020
60°C, 1000 hrs
85°C, 1000 hrs
85°C, -40°C (20 Times)
125°C, -40°C (10 Times)
Freon
Trichloroethane
Hydrocarbons
±3% typ
±3% typ
-33% typ
-33% typ
No Change
No Change
No Change
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.
5
Specifications are subject to change without notice.
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24
Page 6
Terminal SMD and SMDC Series
Surface Mount
Dimension Figures
PolySwitch® Resettable PPTC Datasheet
F
D
A
Part Number
SMD030F-2018
decaSMDC050F/60
SMD100F-2018
SMD150F-2018
SMD200F-2018
SMD030F
SMDC030F
SMD050F
SMDC50F
SMD075F
SMDC075F
SMD075F/60
SMD100F
SMD100F/33
SMDH120
SMD125F
SMDC125F/33
E
Figure 1
C
B
H
D
A
B
E
Figure 2
C
G
F
Figure 3
Dimensions
Dimensions in Millimeters (Inches)
A B C D E F G H
Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min
Size 2018
4.72 5.44
(0.186) (0.214) (0.070) (0.166) (0.194) (0.010) (0.014) (0.010) (0.014) (0.012) (0.018)
4.70 5.31 0.63 0.89 4.19 4.81 0.25 0.95 0.25
(0.185) (0.209) (0.025) (0.035) (0.165) (0.189) (0.010) (0.040) (0.010)
4.72 5.44
(0.186) (0.214) 0.060) (0.166) 0.194) (0.010) (0.014) (0.010) (0.014) (0.012) (0.018)
4.72 5.44
(0.186) (0.214) (0.060) (0.166) (0.194) (0.010) (0.014) (0.010) (0.014) (0.012) (0.018)
4.72 5.44
0.186) (0.214) (0.060) (0.166) (0.194) (0.010) (0.014) (0.010) (0.014) (0.012) (0.018)
6.73 7.98
(0.265) (0.314) (0.125) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
7.30 7.70 0.63 0.90 4.90 5.30 0.25 0.95 0.20
(0.287) (0.303) (0.025) (0.035) (0193) (0.209) (0.010) (0.040) (0.008)
6.73 7.98
(0.265) (0.314) (0.125) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
7.30 7.70 0.63 0.90 4.90 5.30 0.25 0.95 0.20
(0.297) (0.303) (0.025) (0.035) (0.193) (0.209) (0.101) (0.040) (0.008)
6.73 7.98
(0.265) (0.314) (0.125) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
7.30 7.70 0.63 0.90 4.90 5.30 0.25 0.95 0.20
(0.297) (0.303) (0.025) (0.035) (0.193) (0.209) (0.101) (0.040) (0.008)
6.73 7.98
(0.265) (0.314) (0.125) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
6.73 7.98
(0.265) (0.314) (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
6.73 7.98
(0.265) (0.314) (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
6.73 7.98
(0.265) (0.314) (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
6.73 7.98
(0.265) (0.314) (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
7.30 7.70 0.45 0.71 4.90 5.30 0.25 0.95 0.20
(0.287) (0.303) (0.018) (0.028) (0.193) (0.209) (0.010) (0.040) (0.008)
1.78 4.22 4.93 0.25 0.36 0.25 0.36 0.30 0.46
—
— — — 1&2
— — — — — — 3
1.52 4.22 4.93 0.25 0.36 0.25 0.36 0.30 0.46
—
1.52 4.22 4.93 0.25 0.36 0.25 0.36 0.30 0.46
—
1.52 4.22 4.93 0.25 0.36 0.25 0.36 0.30 0.46
—
— — — 1&2
— — — 1&2
— — — 1&2
Size 2920
3.18 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
— — — — — —
3.18 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
— — — — — —
3.18 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
— — — — — —
3.18 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
3.00 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
3.00 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
3.00 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
3.00 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
— — — — — —
Figure
1&2
3
1&2
3
1&2
3
1&2
1&2
1&2
1&2
1&2
3
6
Specifications are subject to change without notice.
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24
Page 7
Terminal SMD and SMDC Series
Surface Mount
Dimension Figures
PolySwitch® Resettable PPTC Datasheet
F
D
A
Part Number
SMD150F/33-2920
SMDC185F/33
SMD200F/24-2920
SMD250F/15-2920
SMD260F
SMD300F
SMD300F/15
SMDC300F/24
SMD310F/18
SMD150F
SMD150F/33
SMDH160
SMD185F
SMD200F
SMD250F
E
Figure 1
C
B
H
D
A
B
E
Figure 2
C
G
F
Figure 3
Dimensions (Cont’d)
Dimensions in Millimeters (Inches)
A B C D E F G H
Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min
Size 2920
6.73 7.98
(0.265) (0.314) (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
7.30 7.70 0.90 1.20 4.90 5.30 0.25 0.95 0.20
(0.287) (0.303) (0.035) (0.047) (0.193) (0.209) (0.010) (0.040) (0.008)
6.73 7.98
(0.265) (0.314) (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
6.73 7.98
(0.265) (0.314) (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
6.73 7.98
(0.265) (0.314) (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
6.73 7.98
(0.265) (0.314) (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
6.73 7.98
(0.265) (0.314) (0.118) (0.19) (0.214) (0.022) (0.028) (0.022) (0.028) (0.085) (0.095) (0.026) (0.054) (0.017)
7.30 7.70 0.80 1.10 4.90 5.30 0.25 0.95 0.20
(0.287) (0.303) (0.031) (0.043) (0.193) (0.209) (0.010) (0.040) (0.008)
7.30 7.70 1.10 1.70 4.90 5.30 0.95 1.45 0.35
(0.287) (0.303) (0.043) (0.067) (0.193) (0.209) (0.040) (0.057) (0.014)
8.00 9.40
(0.315) 0.370) (0.118) (0.236) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017)
8.00 9.40
(0.315) (0.370) (0.118) (0.236) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017)
8.00 9.40
(0.315) (0.370) (0.118) (0.236) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017)
8.00 9.40
(0.315) (0.370) (0.118) (0.236) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) 0.017)
8.00 9.40
(0.315) (0.370) (0.118) (0.236) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017)
8.00 9.40
(0.315) (0.370) (0.118) (0.236) (0.264) (0.022) (0.028) (0.022) (0.028) (0.145) (0.155) (0.026) (0.054) (0.017)
3.00 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
— — — — — —
3.00 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
3.00 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
3.00 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
3.00 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
3.00 4.80 5.44 0.56 0.71 0.56 0.71 2.16 2.41 0.66 1.37 0.43
—
— — — — — —
— — — — — —
Size 3425
3.00 6.00 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43
—
3.00 6.00 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43
—
3.00 6.00 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43
—
3.00 6.00 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43
—
3.00 6.00 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43
—
3.00 6.00 6.71 0.56 0.71 0.56 0.71 3.68 3.94 0.66 1.37 0.43
—
Figure
1&2
3
1&2
1&2
1&2
1&2
1&2
3
3
1&2
1&2
1&2
1&2
1&2
1&2
7
Specifications are subject to change without notice.
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24
Page 8
Terminal SMD and SMDC Series
Surface Mount
Recommended Pad Layout
A
B
Packaging and Marking Information
PolySwitch® Resettable PPTC Datasheet
Part
Number
Tape and Reel
Quantity
Standard
Package
Part
Marking
Recommended Pad Layout Figures
Dimension A
(Nom)
[mm (in)]
Dimension B
(Nom)
Dimension C
(Nom)
Agency
Recognition
Size 2018
SMD030F-2018 4,000 20,000 A03F 4.60 (0.18) 1.50 (0.059) 3.40 (0.134) UL, CSA, TÜV
decaSMDC050F/60 1,000 5,000 050F 60V 4.32 (0.17) 1.40 (0.55) 3.61 (0.142) 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
Size 2920
SMD030F 2,000 10,000 030F 3.10 (0.12) 2.30 (0.09) 5.10 (0.201) UL, CSA, TÜV
SMDC030F 4,000 20,000 030F 5.30 (0.209) 2.00 (0.079) 4.60 (0.18) UL
SMD050F 2,000 10,000 050F 3.10 (0.12) 2.30 (0.09) 5.10 (0.201) UL, CSA, TÜV
SMDC050F 4,000 20,000 050F 5.30 (0.209) 2.00 (0.079) 4.60 (0.18) UL
SMD075F 2,000 10,000 075F 3.10 (0.12) 2.30 (0.09) 5.10 (0.201) UL, CSA, TÜV
SMDC075F 4,000 20,000 075F 5.30 (0.209) 2.00 (0.079) 4.60 (0.18) UL
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
SMDC125F/33 4,000 20,000 125F 5.30 (0.209) 2.00 (0.079) 4.60 (0.18) UL, TUV
SMD150F/33-2920 2,000 10,000 S15F 3.10 (0.12) 2.30 (0.09) 5.10 (0.201) UL, CSA, TÜV
SMDC185F/33 4,000 20,000 185F 33V 5.30 (0.209) 2.00 (0.079) 4.60 (0.18) 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
SMDC300F/24 4,000 20,000 300F 24V 5.30 (0.209) 2.00 (0.079) 4.60 (0.18) UL, CSA, TÜV
SMD310F/18 3,000 15,000 310F18V 5.30 (0.209) 2.00 (0.079) 4.60 (0.18) UL, CSA, TÜV
Size 3425
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
8
Specifications are subject to change without notice.
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24
Page 9
Terminal SMD and SMDC Series
Surface Mount
Solder Reflow Recommendations
Profile Feature Pb-Free Assembly
Average ramp up rate (Ts
Preheat
• Temperature min (Ts
• Temperature max (Ts
to ts
• Time (ts
MIN
) 60-120 s
MAX
Time maintained above:
• Temperature (T
• Time (t
L
) 217°C
L
) 60-150 s
Peak/Classification temperature (Tp) 260°C
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.
to Tp) 3°C/s max
MAX
) 150°C
MIN
) 200°C
MAX
Tp
TL
Ts
MAX
Ts
MIN
25
Reflow Profile
PolySwitch® Resettable PPTC Datasheet
Critical Zone
to Tp
T
L
ts
Preheat
t 25˚C to Peak
Ramp Up
tL
Ramp Down
Time
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
Packaging
2 = Tape and Reel
Footprint
Alternative Voltage Rating (If Applicable)
Lead Free
Hold Current Indicator
SMD: Te rminal Surface Mount PPTC
SMDH: High Temperature Te rminal SMD PPTC
SMDC: Surface Mount PPTC
9
Specifications are subject to change without notice.
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24
Page 10
Terminal SMD and SMDC Series
Surface Mount
Tape and Reel Specifications
PolySwitch® Resettable PPTC Datasheet
Description
EIA 481-2(mm)
SMD030F-2018
SMD100F-2018
SMD150F-2018
SMD200F-2018
2018 Size
decaSMDC050F/60
SMD030F
SMD050F
SMD075F
SMD075F/60
SMD100F
SMD100F/33
SMDH120
SMD125F
SMD150F/33-2920
SMD200F/24-2920
SMD250F/15-2920
SMD260F
SMD300F
SMD300F/15
2920 Size
EIA 481-2(mm)
SMDC030F
SMDC050F
SMDC075F
SMDC125F/33
SMDC185F/33
SMDC300F/24
SMDC310F/18
3425 Size
EIA 481-2(mm)
SMD150F
SMD150F/33
SMDH160
SMD185F
SMD200F
SMD250F
W 16.0 ± 0.30 12.0 ± 0.30 16.0 ± 0.30 16.0 ± 0.30 16.0 ± 0.30 16.0 ± 0.30 16.0 ± 0.30
P
0
P
1
P
2
A
0
B
0
max 6.4 6,2 12.1 12,1 12,1 12,1 12.1
B
1
D
0
4.0 ± 0.10 4.0 ± 0.10 4.0 ± 0.10 4.0 ± 0.10 4.0 ± 0.10 4.0 ± 0.10 4.0 ± 0.10
8.0 ± 0.10 8.0 ± 0.10 8.0 ± 0.10 8.0 ± 0.10 8.0 ± 0.10 8.0 ± 0.10 12.0 ± 0.10
2.0 ± 0.10 2.0 ± 0.05 2.0 ± 0.10 2.0 ± 0.10 2.0 ± 0.10 2.0 ± 0.10 2.0 ± 0.10
5.11 ± 0.15 5.0 ± 0.1 5.6 ± 0.23 5.5 ± 0.1 5.35 ± 0.1 5.5 ± 0.1 6.9 ± 0.23
5.6 ± 0.23 5.4 ± 0.1 8.1 ± 0.15 7.9 ± 0.1 7.85 ± 0.1 8.0 ± 0.1 9.6 ± 0.15
1.5 + 0.10/ -.00 1.55 ± 0.05 1.5 + 0.10/ -.00
1.5 +
0.10/ -.00
1.5 +
0.10/ -.00
1.5 +
0.10/ -.00
0.10/ -.00
F 7.50 ± 0.10 5.50 ± 0.10 7.50 ± 0.10 7.50 ± 0.10 7.50 ± 0.10 7.50 ± 0.10 7.50 ± 0.10
E
min 14.25 10,25 14.25 14,25 14,25 14,25 14.25
E
2
1.75 ± 0.10 1.75 ± 0.10 1.75 ± 0.10 1.75 ± 0.10 1.75 ± 0.10 1.75 ± 0.10 1.75 ± 0.10
1
T max 0.4 0,4 0.4 0,35 0,35 0,35 0.4
1.5 +
max 0.1 0,1 0.1 0,1 0,1 0,1 0.1
T
1
K
0
1.8 ± 0.15 1.7 ± 0.1 3.2 ± 0.15 0.9 ± 0.1 1.45 ± 0.1 2.0 ± 0.1 3.4 ± 0.15
A max 330 330 330 330 330 330 330
N min 50 50 50 50 50 50 50
W
W
2
16.4 + 2.0/-.00 16.4 + 2.0/-.00 16.4 + 2.0/-.00
1
max 22.4 22.4 22.4 22.4 22.4 22.4 22.4
16.4 +
2.0/-.00
10
16.4 +
2.0/-.00
Specifications are subject to change without notice.
16.4 +
2.0/-.00
16.4 +
2.0/-.00
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24
Page 11
Terminal SMD and SMDC Series
Surface Mount
Tape and Reel Diagrams
PolySwitch® Resettable PPTC Datasheet
T
Cover Tape
B
1
K
0
T
1
B
0
Embossment
Figure 1
Cover Tape
P
0
P
2
A
0
A
P
1
D
0
Center lines
of cavity
E
1
F
E
2
W
(Measured at Hub)
2
N (Hub Dia.)
W
W
(Measured at Hub)
Carrier Tape
Embossed Cavity
1
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.
11
Specifications are subject to change without notice.
© 2024 Littelfuse, Inc.
Revised: VL 09/26/24