Radial Lead Resettable Polymer PTCs
SC250 Series
Description
SC250 Series is designed to protect against short duration
high voltage fault currents (power cross or power induction
surge) typically used in AC220V.
Features
0.02-2.0A hold current rating
250VAC operating voltage
Fast time-to- trip
RoHS compliant, Lead-Free and Halogen-Free
Applications
AC220V over-current protection
Power ports
Customer Premises Equipment(CPE)
Electrical Parameters
Part Number
I hold (A)
I trip (A)
V max
(Vac)
SC250-020
SC250-030
SC250-040
SC250-050
SC250-060
SC250-080
SC250-120C
SC250-120S
SC250-160
SC250-200C
SC250-200S
SC250-250
SC250-300
SC250-330
SC250-400
SC250-500
SC250-550
SC250-600
SC250-650
SC250-750
SC250-800
SC250-900
SC250-1000C
SC250-1000S
SC250-1100
SC250-1250C
SC250-1250S
SC250-1350
SC250-1600
SC250-1850
SC250-2000
0.02
0.03
0.04
0.05
0.06
0.08
0.12
0.12
0.16
0.20
0.20
0.25
0.30
0.33
0.40
0.50
0.55
0.60
0.65
0.75
0.80
0.90
1.00
1.00
1.10
1.25
1.25
1.35
1.60
1.85
2.00
0.04
0.06
0.08
0.10
0.12
0.16
0.24
0.24
0.32
0.40
0.40
0.50
0.60
0.66
0.80
1.0
1.1
1.2
1.3
1.5
1.6
1.8
2.0
2.0
2.2
2.5
2.5
2.7
3.2
3.7
4.0
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
I max
(A)
P dtyp.
(W)
1.0
1.0
1.0
1.0
1.2
1.2
1.2
1.2
2.0
3.0
3.0
3.5
4.5
4.5
5.5
6.5
7.0
6.0
6.5
7.5
8.0
9.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
10.0
0.6
0.6
0.7
0.7
0.8
0.8
1.0
1.0
1.4
1.5
1.5
1.5
1.7
1.7
2.0
2.5
2.5
2.5
2.6
2.6
2.7
2.8
2.9
2.9
3.1
3.3
3.3
3.5
3.9
4.3
4.5
SOCAY Electronics Corp., Ltd.
Revision November 23, 2017
Maximum Time
To Trip
Current
Time
(A)
(Sec.)
0.10
8.0
0.15
5.0
0.20
6.0
0.25
5.0
0.30
5.0
0.40
5.0
0.60
5.0
0.60
5.0
0.80
15.0
1.00
9.0
1.00
9.0
1.25
7.0
1.50
8.0
1.65
8.0
2.00
9.0
2.50
10.0
2.75
9.0
3.00
8.0
3.25
12.0
3.75
18.0
4.00
18.0
4.50
18.0
5.00
21.0
5.00
21.0
5.50
21.0
6.25
23.0
6.25
23.0
6.75
23.0
8.00
23.0
9.25
23.0
10.0
28.0
Resistance
R min
(Ω)
60.0
35.0
25.0
22.0
18.0
11.0
6.0
6.0
3.5
3.0
3.0
2.2
1.8
1.6
1.35
0.90
0.80
0.75
0.65
0.55
0.50
0.45
0.37
0.37
0.33
0.27
0.27
0.25
0.20
0.165
0.135
R max
(Ω)
150.0
90.0
65.0
55.0
45.0
22.0
12.0
12.0
7.8
6.5
6.5
5.0
4.0
3.6
3.00
2.00
1.65
1.50
1.30
1.10
1.00
0.90
0.75
0.75
0.66
0.55
0.55
0.50
0.40
0.33
0.27
R 1max
(Ω)
200.0
120.0
90.0
75.0
60.0
33.0
16.0
16.0
10.4
8.0
8.0
6.0
4.8
4.3
3.6
2.4
2.0
1.8
1.6
1.3
1.2
1.1
0.90
0.90
0.80
0.66
0.66
0.60
0.48
0.40
0.33
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Specifications are subject to change without notice.
Please refer to www.socay.com for current information.
Radial Lead Resettable Polymer PTCs
SC250 Series
I hold= Hold current: maximum current device will pass without tripping in 25°C still air.
I trip= Trip current: minimum current at which the device will trip in 25°C still air.
V max= Maximum voltage that can be safely placed across a device in its tripped state under specified fault conditions.
I max= Maximum fault current device can withstand without damage at rated voltage (Vmax)
Pdtyp.= Power dissipated from device when in the tripped state at 25°C still air.
R min= Minimum resistance of device in initial (un-soldered) state.
R max= Maximum resistance of device in initial (un-soldered) state.
R 1max= Maximum resistance of device at 25°C measured one hour after tripping.
Caution: Operation beyond the specified rating may result in damage and possible arcing and flame.
0.48
0.25
Temperature Rerating Chart – I hold (A)
Ambient Operation Temperature
Part Number
-40°C
-20°C
0°C
25°C
SC250-020
0.031
0.027
0.024
0.02
SC250-030
0.047
0.041
0.036
0.03
SC250-040
0.062
0.055
0.048
SC250-050
0.078
0.069
0.060
SC250-060
0.093
0.082
SC250-080
0.124
SC250-120C
40°C
50°C
60°C
70°C
85°C
0.016
0.015
0.025
0.022
0.013
0.011
0.008
0.019
0.017
0.012
0.04
0.033
0.05
0.041
0.029
0.026
0.022
0.016
0.037
0.032
0.028
0.070
0.06
0.021
0.049
0.044
0.038
0.033
0.110
0.095
0.025
0.08
0.066
0.058
0.051
0.044
0.186
0.164
0.033
0.143
0.12
0.098
0.088
0.077
0.066
SC250-120S
0.186
0.049
0.164
0.143
0.12
0.098
0.088
0.077
0.066
SC250-160
0.049
0.248
0.219
0.190
0.16
0.131
0.117
0.102
0.088
0.064
SC250-200C
0.310
0.274
0.238
0.20
0.164
0.146
0.128
0.110
0.082
SC250-200S
0.310
0.274
0.238
0.20
0.164
0.146
0.128
0.110
0.082
SC250-250
0.39
0.34
0.30
0.25
0.21
0.18
0.16
0.14
0.10
SC250-300
0.47
0.41
0.36
0.30
0.25
0.22
0.19
0.17
0.12
SC250-330
0.51
0.45
0.39
0.33
0.27
0.24
0.21
0.18
0.14
SC250-400
0.62
0.55
0.48
0.40
0.33
0.29
0.26
0.22
0.16
SC250-500
0.78
0.69
0.60
0.50
0.41
0.37
0.32
0.28
0.21
SC250-550
0.85
0.75
0.66
0.55
0.45
0.40
0.35
0.30
0.23
SC250-600
0.93
0.82
0.71
0.60
0.49
0.44
0.38
0.33
0.25
SC250-650
1.01
0.89
0.77
0.65
0.53
0.47
0.42
0.36
0.27
SC250-750
1.16
1.03
0.89
0.75
0.62
0.55
0.48
0.41
0.31
SC250-800
1.24
1.10
0.95
0.80
0.66
0.58
0.51
0.44
0.33
SC250-900
1.40
1.23
1.07
0.90
0.74
0.66
0.58
0.50
0.37
SC250-1000C
1.55
1.37
1.19
1.00
0.82
0.73
0.64
0.55
0.41
SC250-1000S
1.55
1.37
1.19
1.00
0.82
0.73
0.64
0.55
0.41
SC250-1100
1.71
1.51
1.31
1.10
0.90
0.80
0.70
0.61
0.45
SC250-1250C
1.94
1.71
1.49
1.25
1.03
0.91
0.80
0.69
0.51
SC250-1250S
1.94
1.71
1.49
1.25
1.03
0.91
0.80
0.69
0.51
SC250-1350
2.09
1.85
1.61
1.35
1.11
0.99
0.86
0.74
0.55
SC250-1600
2.48
2.19
1.90
1.60
1.31
1.17
1.02
0.88
0.66
SC250-1850
2.87
2.53
2.20
1.85
1.52
1.35
1.18
1.02
0.76
SC250-2000
3.10
2.74
2.38
2.00
1.64
1.46
1.28
1.10
0.82
Hold Current (A)
SOCAY Electronics Corp., Ltd.
Revision November 23, 2017
www.socay.com
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@ SOCAY Electronics Corp., Ltd. 2017
Specifications are subject to change without notice.
Please refer to www.socay.com for current information.
Radial Lead Resettable Polymer PTCs
SC250 Series
Temperature Rerating Curve
Time in Seconds
Percentage of Rated Current
Average Time Current Curves
Temperature (°C)
Current in Amperes
A0=SC250-020
A=SC250-030
B=SC250-040
C=SC250-050
D=SC250-060
E=SC250-080
F=SC250-120S/C
G=SC250-160
H=SC250-200C/S
I=SC250-250
J=SC250-300
K=SC250-330
L=SC250-400
M=SC250-500
N=SC250-550
O=SC250-600
P=SC250-650
Q=SC250-750
R=SC250-800
S=SC250-900
T=SC250-1000C/S
U=SC250-1100
V=SC250-1250C/S
W=SC250-1350
X=SC250-1600
Y=SC250-1850
Z=SC250-2000
Test Procedures and Requirement
Test
Test Conditions
Accept/Reject Criteria
Resistance
In still air @25±2°C
Rmin≤R≤Rmax
Hold Current
60 min, at Ihold, In still air @25±2°C
No trip
Time to Trip
Specified current, Vmax, @25±2°C
T≤Maximum Time To Trip
Trip Cycle Life
Vmax, Imax,100 cycles
No arcing or burning
Trip Endurance
Vmax,24hours
No arcing or burning
Soldering Parameters
Pre-Heating Zone
Refer to the condition recommended
by the manufacturer. Max. ramping
rate should not exceed 4°C/Sec
Soldering Zone
Max. solder temperature should not
exceed 260°C
Cooling Zone
Part Numbering
Part Marking
SOCAY Electronics Corp., Ltd.
Revision November 23, 2017
Cooling by natural convection in air
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@ SOCAY Electronics Corp., Ltd. 2017
Specifications are subject to change without notice.
Please refer to www.socay.com for current information.
Radial Lead Resettable Polymer PTCs
SC250 Series
Physical Specifications
0.02-0.04A Tin-plated Copper clad steel
0.05-2.00A Tin-plated Copper
Lead Material
Soldering Characteristics
Solder ability per MIL-STD-202, Method 208E
Insulating Material
Cured, flame retardant epoxy polymer meets UL 94V-0 requirements.
Device Labeling
Marked with ‘SC’, voltage, current rating
Dimensions
Figure1
Figure2
A
Part Number
Figure
Figure3
B
Figure4
C
D
Lead (dia)
Inches
mm
Inches
mm
Inches
mm
Inches
mm
Max.
Max.
Max.
Max.
Typ.
Typ.
Max.
Max.
Packaging
Inches
mm
(Bulk Pack)
SC250-020
Figure3
0.236
6.0
0.342
8.7
0.200±0.020
5.1±0.5
0.181
4.6
0.020
0.5
1000
SC250-030
Figure3
0.236
6.0
0.342
8.7
0.200±0.020
5.1±0.5
0.181
4.6
0.020
0.5
1000
SC250-040
Figure3
0.236
6.0
0.366
9.3
0.200±0.020
5.1±0.5
0.181
4.6
0.020
0.5
1000
SC250-050
Figure3
0.236
6.0
0.366
9.3
0.200±0.020
5.1±0.5
0.181
4.6
0.020
0.5
1000
SC250-060
Figure1
0.236
6.0
0.394
10.0
0.200±0.020
5.1±0.5
0.181
4.6
0.024
0.6
1000
SC250-080
Figure3
0.236
6.0
0.394
10.0
0.200±0.020
5.1±0.5
0.181
4.6
0.024
0.6
1000
SC250-120C
Figure3
0.283
7.2
0.441
11.2
0.200±0.020
5.1±0.5
0.181
4.6
0.024
0.6
1000
SC250-120S
Figure4
0.256
6.5
0.413
10.5
0.200±0.020
5.1±0.5
0.181
4.6
0.024
0.6
1000
SC250-160
Figure3
0.366
9.3
0.504
12.8
0.200±0.020
5.1±0.5
0.181
4.6
0.024
0.6
1000
SC250-200C
Figure3
0.394
10.0
0.531
13.5
0.200±0.020
5.1±0.5
0.181
4.6
0.024
0.6
1000
SC250-200S
Figure4
0.366
9.3
0.504
12.8
0.200±0.020
5.1±0.5
0.181
4.6
0.024
0.6
1000
SC250-250
Figure4
0.366
9.3
0.504
12.8
0.200±0.020
5.1±0.5
0.181
4.6
0.024
0.6
1000
SC250-300
Figure4
0.366
9.3
0.571
14.5
0.200±0.020
5.1±0.5
0.181
4.6
0.024
0.6
1000
SC250-330
Figure4
0.366
9.3
0.571
14.5
0.200±0.020
5.1±0.5
0.181
4.6
0.024
0.6
1000
SC250-400
Figure2
0.413
10.5
0.650
16.5
0.200±0.020
5.1±0.5
0.181
4.6
0.031
0.8
1000
SC250-500
Figure2
0.465
11.8
0.689
17.5
0.200±0.020
5.1±0.5
0.181
4.6
0.031
0.8
500
SC250-550
Figure2
0.465
11.8
0.689
17.5
0.200±0.020
5.1±0.5
0.181
4.6
0.031
0.8
500
SC250-600
Figure2
0.465
11.8
0.689
17.5
0.200±0.020
5.1±0.5
0.181
4.6
0.031
0.8
500
SC250-650
Figure2
0.551
14.0
0.720
18.8
0.200±0.020
5.1±0.5
0.181
4.6
0.031
0.8
500
SOCAY Electronics Corp., Ltd.
Revision November 23, 2017
www.socay.com
4/5
@ SOCAY Electronics Corp., Ltd. 2017
Specifications are subject to change without notice.
Please refer to www.socay.com for current information.
Radial Lead Resettable Polymer PTCs
SC250 Series
Dimensions (Continue)
A
Part Number
Figure
B
C
D
Lead (dia)
Inches
mm
Inches
mm
Inches
mm
Inches
mm
Max.
Max.
Max.
Typ.
Typ.
Max.
Max.
Packaging
Inches
mm
(Bulk Pack)
SC250-750
Figure2
0.570
14.5
0.854
Max
.
22.2
0.200±0.020
5.1±0.5
0.181
4.6
0.031
0.8
500
SC250-800
Figure2
0.570
14.5
0.854
22.2
0.200±0.020
5.1±0.5
0.181
4.6
0.031
0.8
500
SC250-900
Figure2
0.650
16.5
0.965
24.5
0.400±0.020
10.2±0.5
0.181
4.6
0.031
0.8
200
SC250-1000C
Figure1
0.831
21.1
0.988
25.1
0.400±0.020
10.2±0.5
0.181
4.6
0.031
0.8
200
SC250-1000S
Figure2
0.748
19.0
1.004
25.5
0.400±0.020
10.2±0.5
0.181
4.6
0.031
0.8
200
SC250-1100
Figure2
0.748
19.0
1.004
25.5
0.400±0.020
10.2±0.5
0.181
4.6
0.031
0.8
200
SC250-1250C
Figure1
0.953
24.2
1.110
28.2
0.400±0.020
10.2±0.5
0.181
4.6
0.031
0.8
200
SC250-1250S
Figure2
0.748
19.0
1.142
29.0
0.400±0.020
10.2±0.5
0.181
4.6
0.031
0.8
200
SC250-1350
Figure2
0.748
19.0
1.142
29.0
0.400±0.020
10.2±0.5
0.181
4.6
0.031
0.8
200
SC250-1600
Figure2
0.846
21.5
1.142
29.0
0.400±0.020
10.2±0.5
0.181
4.6
0.031
0.8
200
SC250-1850
Figure2
0.984
25.0
1.142
29.0
0.400±0.020
10.2±0.5
0.181
4.6
0.031
0.8
100
SC250-2000
Figure2
0.984
25.0
1.319
33.5
0.400±0.020
10.2±0.5
0.181
4.6
0.031
0.8
100
Warning
This product should not be used in an application where the maximum interrupt voltage or maximum interrupt current in a
fault condition, Operation beyond the maximum rating or improper use may result in device damage and possible electrical
arcing and flame.
A PPTC device is not a fuse, It is a nonlinear thermistor that limits current, Because under a fault condition all PPTC devices
go into a high resistance state but not open circuit hazardous voltage may be present at PPTC.
The devices 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.
In most application, power must be removed and the fault condition cleared in order to reset a PPTC device.
PPTC devices are not recommended to be installed in applications where the device is constrained such that its PPTC
properties are inhibited, for example in rigid potting materials or Add devices surface coating, Bundled devices ontology,
which lack adequate clearance to accommodate device expansion.
Contamination on of the PPTC material with certain silicone-based oils or some aggressive solvents can adversely impact the
performance of the devices. For example, Organic solvents to cleaning.
SOCAY Electronics Corp., Ltd.
Revision November 23, 2017
www.socay.com
5/5
@ SOCAY Electronics Corp., Ltd. 2017
Specifications are subject to change without notice.
Please refer to www.socay.com for current information.
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