NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 9 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Features
1. RoHS & Halogen Free (HF) compliant
2. Body size: Ф5mm ~ Ф30mm
3. Radial lead resin coated
4. High power rating
5. Wide resistance range
6. Cost effective
7. Operating temperature range:
Ф5mm: -40℃~+150℃
Ф8~ Ф10mm: -40℃~+170℃
Ф13mm~ Ф30mm: -40℃~+200℃
8. Agency recognition: UL / cUL / TUV / CSA / CQC
Recommended Applications
1. Switch mode power supply
2. Electric motor
3. Transformer
4. Adapter
5. Projector
6. Halogen lamp
7. LED driver circuit
Part Number Code
Ф5mm~ Ф15mm
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Ф20mm~ Ф30mm
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Optional Suffix
YRoHS & HF
Compliant
Product Type
SCK
THINKING
NTC Thermistor
SCK Series
Body Size
05 Ф5mm
08 Ф8mm
10 Ф10mm
13 Ф13mm
15 Ф15mm
Zero Power
Resistance
at 25℃ (
R25)
0R5 0.5Ω
2R5 2.5Ω
08 8Ω
20 20Ω
120 120Ω
Max Steady
State Current
at 25℃
X3 0.3A
2X 2.5A
88A
10 10A
Tolerance
of R25
L ±15%
M ±20%
N ±25%
Appearance
S Straight lead
F Y kink lead
T L kink lead
Optional Suffix
Y RoHS & HF Compliant
H
RoHS & HF Compliant
(For SCK25 and
SCK30 only)
Product Type
SCK
THINKING
NTC Thermistor
SCK Series
Tolerance
of R25
L ±15%
M ±20%
N ±25%
Appearance
S Straight lead
F Y kink lead
T L kink lead
Body Size
20 Ф20mm
25 Ф25mm
30 Ф30mm
Zero Power
Resistance
at 25℃ (R25)
R25＜10Ω
0R7:0.7Ω
2R5:2.5Ω
R25 10Ω≧
100:10Ω
470:47Ω
471:470Ω
Packaging
B Bulk
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 10 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Structure and Dimensions
(Unit: mm)
Series Dmax. P. d Amax. Lmin. Tmax.
SCK05 6.5 4±0.6 0.8±0.02 6.5 31 5
SCK08 9.5 5±0.8 0.8±0.02 9.5 31 5
SCK10 11.5 5±0.8 0.8±0.02 11.5 31 5
SCK13 14.5 7.5±1 0.8±0.02 14.5 30 6
SCK15 16.5 7.5±1 1.0±0.02 16.5 29 6
SCK20 21.5 7.5±1 1.0±0.02 21.5 26 6
SCK25 29 7.5±1 1.0±0.02 29.0 25 7
SCK30 36 7.5±1 1.0±0.02 36.0 23 8
F Type (Y kink lead)
(Unit: mm)
Series Dmax. P d Amax. Lmin. Tmax.
SCK05 6.5 4±0.6 0.8±0.02 11.0 29 5
SCK08 9.5 5±0.8 0.8±0.02 13.0 29 5
SCK10 11.5 5±0.8 0.8±0.02 15.0 29 5
SCK13 14.5 7.5±1 0.8±0.02 17.5 27 6
SCK15 16.5 7.5±1 1±0.02 19.0 26 6
SCK20 21.5 7.5±1 1±0.02 24.5 25 6
SCK25 29 7.5±1 1±0.02 35.0 22 7
SCK30 36 7.5±1 1±0.02 42.0 22 8
S Type (Straight lead)
(Unit: mm)
Series Dmax. P d Amax. Hmax. C. Tmax.
SCK05 6.5 4±0.6 0.8±0.02 11.0
15.5 4.0±1 5
SCK08 9.5 5±0.8 0.8±0.02 13.0
17.5 4.0±1 5
SCK10 11.5 5±0.8 0.8±0.02 15.0 19.5 4.0±1 5
SCK13 14.5 7.5±1 0.8±0.02 17.5 21.5 4.0±1 6
SCK15 16.5 7.5±1 1±0.02 19.0 23.5 4.0±1 6
SCK20 21.5 7.5±1 1±0.02 24.5 28.5 4.0±1 6
T Type (L kink lead)
D
T
A
L
d
P
T
A
L
d
P
D
T
A
H
dP
D
C
Max. 3mm
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 11 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Electrical Characteristics
Note 1: □ = Tolerance of R25
Note 2: Special specifications are available upon request.
Zero Power
Resistance
at 25°C
Max.
Current
at 25℃
Residual
Resistance
at 25 Imax℃
Recommend
Capacitance
@240Vac
Max.
Power Rating
at 25°C
Dissipation
Factor
Thermal
Time
Constant
Operating
Temperature
Range
Part No.
R25(Ω) Imax(A) RImax(Ω) Cth(F) Pmax(W) δ(mW/°C) τ(Sec.) TL~TU(°C)
SCK05052□ 5 2 0.429 100
SCK05081□ 8 1 1.089 68
SCK05101□ 10 1 1.126 100
SCK05121□ 12 1 1.184 68
SCK0520X3□ 20 0.3 5.560 100
1.8 Approx.
15
Approx.
17 -40 ~ +150
SCK08042□ 4 2 0.441 220
SCK084R72□ 4.7 2 0.445 220
SCK08053□ 5 3 0.261 220
SCK08063□ 6 3 0.283 220
SCK08073□ 7 3 0.287 220
SCK08082□ 8 2 0.520 220
SCK08102□ 10 2 0.542 220
SCK08152□ 15 2 0.548 100
SCK08201□ 20 1 1.544 100
SCK0830X□ 30 0.5 4.094 100
2.3 Approx.
16
Approx.
38 -40 ~ +170
SCK10015□ 1 5 0.091 470
SCK101R35□ 1.3 5 0.095 330
SCK101R55□ 1.5 5 0.101 330
SCK102R55A□ 2.5 5 0.120 470
SCK10035□ 3 5 0.127 560
SCK10044□ 4 4 0.161 560
SCK10054□ 5 4 0.180 470
SCK106R83□ 6.8 3 0.270 330
SCK10083□ 8 3 0.278 330
SCK10103□ 10 3 0.297 330
SCK10123□ 12 3 0.301 470
SCK10133□ 13 3 0.356 330
SCK10152X□ 15 2.5 0.442 330
SCK10162X□ 16 2.5 0.471 330
SCK10202□ 20 2 0.646 330
SCK10222□ 22 2 0.659 220
SCK10252□ 25 2 0.674 330
SCK10302□ 30 2 0.700 330
SCK10472□ 47 2 0.720 330
SCK10502□ 50 2 0.813 330
SCK10801□ 80 1 2.236 220
SCK101001□ 100 1 2.318 200
SCK101201□ 120 1 2.406 200
2.4 Approx.
17
Approx.
43 -40 ~ +170
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 12 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Electrical Characteristics
Note 1: □ = Tolerance of R25
Note 2: Special specifications are available upon request.
Zero Power
Resistance
at 25°C
Max.
Current
at 25℃
Residual
Resistance
at 25 Imax℃
Recommend
Capacitance
@240Vac
Max.
Power Rating
at 25°C
Dissipation
Factor
Thermal
Time
Constant
Operating
Temperature
Range
Part No.
R25(Ω) Imax(A) RImax(Ω) Cth(F) Pmax(W) δ(mW/°C) τ(Sec.) TL~TU(°C)
SCK13013 1 3 0.174 560
SCK131R37 1.3 7 0.070 470
SCK132R56 2.5 6 0.094 560
SCK13045 4 5 0.132 560
SCK134R74 4.7 4 0.168 560
SCK13055 5 5 0.166 560
SCK13074 7 4 0.184 470
SCK13084 8 4 0.206 470
SCK13104 10 4 0.217 470
SCK13124 12 4 0.230 560
SCK13153 15 3 0.343 560
SCK13163 16 3 0.348 560
SCK13183 18 3 0.365 560
SCK13203 20 3 0.410 470
3.1 Approx.
18
Approx.
66 -40 ~ +200
SCK150R78A 0.7 8 0.051 680
SCK15018 1 8 0.054 680
SCK151R38 1.3 8 0.064 680
SCK151R58 1.5 8 0.068 800
SCK15028 2 8 0.078 680
SCK152R58 2.5 8 0.086 680
SCK15037 3 7 0.091 820
SCK15046 4 6 0.117 800
SCK15056 5 6 0.121 820
SCK15065 6 5 0.159 680
SCK15075 7 5 0.161 820
SCK15085 8 5 0.165 680
SCK15105 10 5 0.178 820
SCK15125 12 5 0.185 680
SCK15154 15 4 0.261 820
SCK15164 16 4 0.265 820
SCK15184 18 4 0.273 680
SCK15204 20 4 0.283 820
SCK15224 22 4 0.308 560
SCK15253 25 3 0.425 680
SCK15303 30 3 0.461 680
SCK15333 33 3 0.484 560
SCK15403 40 3 0.511 680
SCK15473 47 3 0.517 680
SCK15802X 80 2.5 0.693 560
SCK151202 120 2 1.010 560
3.6 Approx.
21
Approx.
75 -40 ~ +200
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 13 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Electrical Characteristics
Note 1: □ = Tolerance of R25
Note 2: Special specifications are available upon request.
Zero Power
Resistance
at 25°C
Max.
Current
at 25℃
Residual
Resistance
at 25 Imax℃
Recommend
Capacitance
@240Vac
Max.
Power Rating
at 25°C
Dissipation
Factor
Thermal
Time
Constant
Operating
Temperature
Range
Part No.
R25(Ω) Imax(A) RImax(Ω) Cth(F) Pmax(W) δ(mW/°C) τ(Sec.) TL~TU(°C)
SCK200R7□ 0.7 15 0.035
SCK201R0□ 1 13 0.034
SCK201R5□ 1.5 10.5 0.041
SCK202R0□ 2 10 0.062
SCK202R5□ 2.5 9 0.083
SCK203R0□ 3 8.5 0.078
SCK204R0□ 4 8 0.080
SCK204R7□ 4.7 7.5 0.114
SCK205R0□ 5 7.5 0.118
SCK206R0□ 6 7 0.120
SCK206R8□ 6.8 6.5 0.130
SCK207R0□ 7 6.5 0.132
SCK208R0□ 8 6 0.161
SCK20100□ 10 5.5 0.196
SCK20120□ 12 5 0.197
SCK20130□ 13 5 0.213
SCK20150□ 15 4.5 0.258
SCK20160□ 16 4.5 0.276
SCK20180□ 18 4 0.280
SCK20200□ 20 4 0.306
1000 4.9
Approx.
28
Approx.
113 -40 ~ +200
SCK251R0□ 1 20 0.020
SCK251R5□ 1.5 18.5 0.023
SCK252R0□ 2 18 0.025
SCK252R5□ 2.5 15 0.032
SCK253R0□ 3 14.5 0.042
SCK254R0□ 4 14 0.044
SCK254R7□ 4.7 13 0.052
SCK255R0□ 5 12 0.061
SCK256R8□ 6.8 10.5 0.082
SCK257R0□ 7 10 0.092
SCK258R0□ 8 9 0.115
SCK25100□ 10 8 0.141
SCK25120□ 12 7.5 0.164
SCK25150□ 15 6.5 0.210
SCK25180□ 18 5.5 0.231
SCK25200□ 20 5 0.270
1200 7.0 Approx.
30
Approx.
130 -40 ~ +200
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 14 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Electrical Characteristics
Note 1: □ = Tolerance of R25
Note 2: Special specifications are available upon request.
Zero Power
Resistance
at 25°C
Max.
Current
at 25℃
Residual
Resistance
at 25 Imax℃
Recommend
Capacitance
@240Vac
Max.
Power Rating
at 25°C
Dissipation
Factor
Thermal
Time
Constant
Operating
Temperature
Range
Part No.
R25(Ω) Imax(A) RImax(Ω) Cth(F) Pmax(W) δ(mW/°C) τ(Sec.) TL~TU(°C)
SCK301R0□ 1 30 0.016
SCK301R5□ 1.5 25 0.020
SCK302R0□ 2 23 0.022
SCK302R5□ 2.5 18 0.030
SCK303R0□ 3 17 0.035
SCK304R0□ 4 16 0.048
SCK304R7□ 4.7 15 0.055
SCK305R0□ 5 14 0.057
SCK306R8□ 6.8 12 0.077
SCK307R0□ 7 11.5 0.084
SCK308R0□ 8 10.5 0.100
SCK30100□ 10 10 0.115
SCK30120□ 12 9 0.142
SCK30150□ 15 8 0.175
SCK30180□ 18 7 0.210
SCK30200□ 20 6 0.233
1500 8.0
Approx.
40
Approx.
190 -40 ~ +200
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 15 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Safety Approvals
UL&cUL File No: E138827
CSA File No: 97495
TUV File No: R 50050155
CQC File No:CQC05001011984,993,985,942,943,944, CQC05001011988,989,990,963,964,965
Safety Approvals Safety Approvals
Body Size Certified
Model No. UL cUL CSA TUV CQC
Body Size Certified
Model No. UL cUL CSA TUV CQC
SCK-052 SCK-013
SCK-081 SCK-1R37
SCK-101 SCK-2R56
SCK-121 SCK-045
5mm
SCK-20X3 SCK-4R74
SCK-042 SCK-055
SCK-4R72 SCK-074
SCK-053 SCK-084
SCK-063 SCK-104
SCK-073 SCK-124
SCK-082 SCK-153
SCK-102 SCK-163
SCK-152 SCK-183
SCK-201
13mm
SCK-203
8mm
SCK-30X SCK-0R78A
SCK-015 SCK-018
SCK-1R35 SCK-1R38
SCK-1R55 SCK-1R58
SCK-2R55A SCK-028
SCK-035 SCK-2R58
SCK-044 SCK-037
SCK-054 SCK-046
SCK-6R83 SCK-056
SCK-083 SCK-065
SCK-103 SCK-075
SCK-123 SCK-085
SCK-133 SCK-105
SCK-152X SCK-125
SCK-162X SCK-154
SCK-202 SCK-164
SCK-222 SCK-184
SCK-252 SCK-204
SCK-302 SCK-224
SCK-472 SCK-253
SCK-502 SCK-303
SCK-801 SCK-333
SCK-1001 SCK-403
10mm
SCK-1201
15mm
SCK-473
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 16 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Safety Approvals Safety Approvals
Body Size Certified
Model No. UL cUL TUV CQC
Body Size Certified
Model No. UL cUL TUV CQC
SCK200R7 SCK301R0
SCK201R0 SCK301R5
SCK201R5 SCK302R0
SCK202R0 SCK302R5
SCK202R5 SCK303R0
SCK203R0 SCK304R0
SCK204R0 SCK304R7
SCK204R7 SCK305R0
SCK205R0 SCK306R8
SCK206R0 SCK307R0
SCK206R8 SCK308R0
SCK207R0 SCK30100
SCK208R0 SCK30120
SCK20100 SCK30150
SCK20120 SCK30180
SCK20130
30mm
SCK30200
SCK20150
SCK20160
SCK20180
20mm
SCK20200
SCK251R0
SCK251R5
SCK252R0
SCK252R5
SCK253R0
SCK254R0
SCK254R7
SCK255R0
SCK256R8
SCK257R0
SCK258R0
SCK25100
SCK25120
SCK25150
SCK25180
25mm
SCK25200
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 17 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
0.1
1
10
100
1000
-40-30-20-100 102030405060708090100110120130140150
0.1
1
10
100
1000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170
Max. Current Derating Curve
R-T Characteristic Curves
SCK05052~SCK0520X3
Temperature ( )℃
Resistance
(
Ω
)
SCK08042~SCK0830X
SCK0830X
SCK08201
SCK08152
SCK08102
SCK08082
SCK08073
SCK08063
SCK08053
SCK084R72
SCK08042
Temperature ( )℃
TU: Maximum operating temperature (℃)
TL: Minimum operating temperature (℃)
For example:
Ambient temperature(Ta) = 60℃
Maximum operating temperature(TU) = 200℃
ITa = [1-(Ta-25)/(Tu-25)]×Imax = 80%Imax
SCK05121
SCK05101
SCK05081
SCK0520X3
SCK05052
100%
0
TL025 TU
Ambient temperature (℃)
ITa
Imax
Resistance
(
Ω
)
0 25
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 18 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
0.01
0.1
1
10
100
1000
10000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170
0.01
0.1
1
10
100
1000
10000
-40-30-20-100 102030405060708090100110120130140150160170
0.01
0.1
1
10
100
1000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
R-T Characteristic Curves
0.01
0.1
1
10
100
1000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
Temperature ( )℃
SCK10015~SCK101201 SCK101R35~SCK101001
Resistance (Ω)
Temperature ( )℃
SCK101001
SCK10502
SCK10302
SCK10222
SCK10162X
SCK10133
SCK10103
SCK106R83
SCK10044
SCK102R55A
SCK101R35
Temperature (℃)
SCK13183
SCK13153
SCK13104
SCK13074
SCK134R74
SCK132R56
SCK13013
SCK13013~SCK13183
Temperature (℃)
SCK13203
SCK13163
SCK13124
SCK13084
SCK13055
SCK13045
SCK131R37
SCK131R37~SCK13203
Resistance (Ω)
SCK101201
SCK10801
SCK10472
SCK10252
SCK10202
SCK10152X
SCK10123
SCK10083
SCK10054
SCK10035
SCK101R55
SCK10015
Resistance (Ω)
Resistance (Ω)
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 19 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
0.01
0.1
1
10
100
1000
10000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
0.01
0.1
1
10
100
1000
10000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
0.01
0.1
1
10
100
1000
10000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
0.01
0.1
1
10
100
1000
10000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
R-T Characteristic Curves
Resistance(Ω)
Temperature (℃)
SCK151202
SCK15403
SCK15224
SCK15164
SCK15105
SCK15065
SCK15037
SCK151R58
SCK150R78A
Resistance(Ω)
Temperature (℃)
SCK150R78A~SCK151202 SCK15016~SCK15473
SCK15473
SCK15253
SCK15184
SCK15125
SCK15075
SCK15046
SCK15028
SCK15016
Resistance(Ω)
Temperature (℃)
SCK200R7~SCK20180
SCK20180
SCK20150
SCK20120
SCK208R0
SCK206R8
SCK205R0
SCK204R0
SCK202R5
SCK201R5
SCK200R7
Resistance(Ω)
Temperature (℃)
SCK151R38~SCK15802X
SCK15802X
SCK15303
SCK15204
SCK15154
SCK15085
SCK15056
SCK152R58
SCK151R38
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 20 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
0.01
0.1
1
10
100
1000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
0.01
0.1
1
10
100
1000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
0.01
0.1
1
10
100
1000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
0.01
0.1
1
10
100
1000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
R-T Characteristic Curves
Resistance(Ω)
Temperature (℃)
SCK20200
SCK20160
SCK20130
SCK20100
SCK207R0
SCK206R0
SCK204R7
SCK203R0
SCK202R0
SCK201R0
SCK201R0~SCK20200
Resistance(Ω)
Temperature (℃)
SCK251R0~SCK25180
SCK25180
SCK25120
SCK258R0
SCK256R8
SCK254R7
SCK253R0
SCK252R0
SCK251R0
SCK301R0~SCK30180
SCK30180
SCK30120
SCK308R0
SCK306R8
SCK304R7
SCK303R0
SCK302R0
SCK301R0
Temperature (℃)
Resistance(Ω)
Resistance(Ω)
Temperature (℃)
SCK251R5~SCK25200
SCK25200
SCK25150
SCK25100
SCK257R0
SCK255R0
SCK254R0
SCK252R5
SCK251R5
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 21 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
0.01
0.1
1
10
100
1000
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
R-T Characteristic Curves
Resistance(Ω)
SCK30200
SCK30150
SCK30100
SCK307R0
SCK305R0
SCK304R0
SCK302R5
SCK301R5
SCK301R5~SCK30200
Temperature (℃)
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 22 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
0.1
1
10
0.01 0.1 1 10 100
2
5
0.5
0.2
0.02 0.05 0.2 0.5 2 5 20 50
0.1
1
10
0.01 0.1 1 10 100
2
5
0.5
0.2
0.02 0.05 0.2 0.5 2 5 20 50
V-I Characteristic Curves (representative)
Voltage (V)
Current (A)
SCK05052~SCK0520X3
Voltage (V)
Current (A)
SCK08042~SCK08201
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 23 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
0.1
1
10
0.01 0.1 1 10 1000.02 0.05 0.2 0.5 2 5 20 50
2
5
0.5
0.2
SCK10015
SCK10152X
SCK102R55A
SCK10054
0.1
1
10
0.01 0.1 1 10 100
2
5
0.5
0.2
0.02 0.05 0.2 0.5 2 5 20 50
SCK10015~SCK10222
Voltage (V)
Current (A)
SCK131R37~SCK13203
Voltage (V)
Current (A)
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 24 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
0.1
1
10
0.01 0.1 1 10 100
2
5
0.5
0.2
0.02 0.05 0.2 0.5 2 5 20 50
0.1
1
10
0.01 0.1 1 10 100
2
5
0.5
0.2
0.02 0.05 0.2 0.5 2 5 20 50
SCK151R38~SCK15303
Voltage (V)
Current (A)
SCK200R7~SCK20200
Voltage (V)
Current (A)
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 25 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
0.1
1
10
0.01 0.1 1 10 100
0.02 0.05 0.2 0.5 2 5 20 50
0.2
0.5
2
5
0.1
1
10
0.01 0.1 1 10 100
0.02 0.05 0.2 0.5 2 5 20 50
0.2
0.5
2
5
SCK251R0~SCK25121
Voltage (V)
Current (A)
SCK301R0~SCK30200
Voltage (V)
Current (A)
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 26 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Soldering Recommendation
Wave Soldering Profile
Recommended Reworking Conditions with Soldering Iron
Item Condition
Temperature of Soldering Iron-tip 360℃ (max.)
Soldering Time 3 sec. (max.)
Distance from Thermistor 2 mm (min.)
Tem
p
erature
130±20℃
260℃ Max
Tamb
Cooling
Time
Soldering Preheating
30~90 sec. ＜1 sec. ＜10 sec.
Note 1
Note 2 Note 3
Note 1: (1~3℃)/sec.
Note 2: Approx. 200℃/sec.
Note 3: 5℃/sec. (Max.)
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 27 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Reliability
Item Standard Test conditions / Methods Specifications
Tensile Strength
of Terminals IEC 60068-2-21
Gradually apply the specified force and keep the unit fixed for 10±1
sec.
Terminal diameter Force
(mm) (Kg)
0.5<d 0.80 ≦1.0
0.8<d 1.25 ≦2.0
No visible damage
Solderability IEC 60068-2-20 245 ±3 ,℃ 3 ± 0.3 sec.
At least 95% of terminal
electrode is covered by
new solder
Resistance to
Soldering Heat IEC 60068-2-20 260 ± 3 ,℃ 10 ± 1 sec. No visible damage
∣△R25/R25 10 %∣≦
High Temperature
Storage IEC 60068-2-2 Tu ± 5 ℃, 1000± 24 hrs No visible damage
∣△R25/R25 20 %∣≦
Damp Heat,
Steady State IEC 60068-2-78 40 ± 2 ,℃ 90~95% RH, 1000 ± 24 hrs No visible damage
∣△R25/R25 20 %∣≦
Rapid Change of
Temperature IEC 60068-2-14
The conditions shown below shall be repeated 5 cycles.
Step Temperature ( )℃ Period (minutes)
1 TL ± 5 30 ± 3
2 Room temperature 5 ± 3
3 TU ± 5 30 ± 3
4 Room temperature 5 ± 3
No visible damage
∣△R25/R25 20 %∣≦
Max. Current IEC 60539-1 25 ± 5 , Imax℃. , 1000± 24 hrs No visible damage
∣△R25/R25 20 %∣≦
Endurance Specification
Standard
25 ± 5 , Imax. , C℃th, 1min ON / 5 mins OFF x 1000 cycles
Cth= Capacitance at 240 Vac
No visible damage
∣△R25/R25 20 %∣≦
Insulation Test MIL-STD-202F
-Method 302 1000 VDC , 1 min No visible damage
500 MΩ≧
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 28 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Packaging
Taping Specification
S (Straight lead) Type
Figure A Figure B Figure C
P0 F P P1 H H1 d W0W1 W2W P△ h△ L1 D0 T
Taping
Dimension
Disc
Size ±0.3 ±1 ±1 ±0.7 +2/-0 Max. ±0.02 ±1 +0.75
/-0.5 Max. +1/
-0.5 Max. Max. Max. ±0.2 ±0.2
Figure
05 12.7 4.0 12.7 4.35 18 28 0.8 12 9 3 18 1 2 0.5 4 0.6 A
08 12.7 5.0 12.7 3.85 18 30 0.8 12 9 3 18 1 2 0.5 4 0.6 A
10 12.7 5.0 12.7 3.85 18 32 0.8 12 9 3 18 1 2 0.5 4 0.6 A
13 12.7 7.5 25.4 8.95 18 35 0.8 12 9 3 18 1 2 0.5 4 0.6 B
15 12.7 7.5 25.4 8.95 18 37 1.0 12 9 3 18 1 2 0.5 4 0.6 B
P0:12.7
20 12.7 7.5 25.4 8.95 18 42 1.0 12 9 3 18 1 2 0.5 4 0.6 B
05 15.0 4.0 15.0
5.50 18 28 0.8 12 9 3 18 1 2 0.5 4 0.6 A
08 15.0 5.0 15.0 5.00 18 30 0.8 12 9 3 18 1 2 0.5 4 0.6 A
10 15.0 5.0 15.0 5.00 18 32 0.8 12 9 3 18 1 2 0.5 4 0.6 A
13 15.0 7.5 30.0 3.75 18 35 0.8 12 9 3 18 1 2 0.5 4 0.6 C
15 15.0 7.5 30.0 3.75 18 37 1.0 12 9 3 18 1 2 0.5 4 0.6 C
P0:15.0
20 15.0 7.5 30.0 3.75 18 42 1.0 12 9 3 18 1 2 0.5 4 0.6 C
P
H1 d
L1 D0
P0
H
F
W2
W1
W
W0
P1
P
P1
(Unit: mm)
P
P1
hh
T
pp
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 29 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
F Kink Type
Figure A Figure B Figure C
P0 F P P1 H0 H1 d W0W1W2W P△ h△ L1 D0 T
Taping
Dimension
Disc
Size ±0.3 ±1 ±1 ±0.7 ±0.5 Max. ±0.02 ±1 +0.75
/-0.5 Max. +1/
-0.5 Max. Max. Max. ±0.2 ±0.2
Figure
05 12.7 4.0 12.7 4.35 16 28 0.8 12 9 3 18 1 2 0.5 4 0.6 A
08 12.7 5.0 12.7 3.85 16 30 0.8 12 9 3 18 1 2 0.5 4 0.6 A
10 12.7 5.0 12.7 3.85 16 32 0.8 12 9 3 18 1 2 0.5 4 0.6 A
13 12.7 7.5 25.4 8.95 16 35 0.8 12 9 3 18 1 2 0.5 4 0.6 B
15 12.7 7.5 25.4 8.95 16 37 1.0 12 9 3 18 1 2 0.5 4 0.6 B
P0:12.7
20 12.7 7.5 25.4 8.95 16 42 1.0 12 9 3 18 1 2 0.5 4 0.6 B
05 15.0 4.0 15.0 5.50 16 28 0.8 12 9 3 18 1 2 0.5 4 0.6 A
08 15.0 5.0 15.0 5.00 16 30 0.8 12 9 3 18 1 2 0.5 4 0.6 A
10 15.0 5.0 15.0 5.00 16 32 0.8 12 9 3 18 1 2 0.5 4 0.6 A
13 15.0 7.5 30.0 3.75 16 35 0.8 12 9 3 18 1 2 0.5 4 0.6 C
15 15.0 7.5 30.0 3.75 16 37 1.0 12 9 3 18 1 2 0.5 4 0.6 C
P0:15.0
20 15.0 7.5 30.0 3.75 16 42 1.0 12 9 3 18 1 2 0.5 4 0.6 C
P
P1
(Unit: mm)
P
H1 d
L1 D0
P0
H0
F
W2
W1
W
W0
P1
P
P1
T
pp
NTC Thermistor：SCK Series
Power Thermistor for Limiting Inrush Current
THINKING ELECTRONIC INDUSTRIAL CO., LTD. 30 www.thinking.com.tw 2012.08
All specifications are subject to change without notice.
Quantity
Bulk Packing
Reel Packing
Ammo Packing
Warehouse Storage Conditions of Products
Storage Conditions:
1. Storage Temperature: -10℃~+40℃
2. Relative Humidity: ≦75%RH
3. Keep away from corrosive atmosphere and sunlight.
Period of Storage: 1 year
Series Standard Lead Type
Quantity (pcs/bag)
Cut Lead Type
Quantity (pcs/bag)
L kink Type
Quantity (pcs/bag)
SCK05 250 500 ---
SCK08 250 250 200
SCK10 200 250 200
SCK13 100 200 100
SCK15 100 100 100
SCK20 500 (pcs/box) 50 50
SCK25 168 (pcs/box) 168 (pcs/box) ---
SCK30 168 (pcs/box) 168 (pcs/box) ---
Series D
(mm)
D1
(mm)
W
(mm)
Quantity
(pcs/reel)
SCK05 2,500
SCK08 1,500
SCK10 1,500
SCK13 750
SCK15 750
SCK20
340±10 31±1 55±1
500
Series Quantity (pcs/box)
SCK05 1,000
SCK08 1,000
SCK10 1,000
SCK13 500
SCK15 500
SCK20 500
Body Size L W H
Φ5~Φ20 348 275 60
(Unit: mm)
D1
D
W
W
H
L
