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NTC

SCK15-048 Datasheet Preview

SCK15-048 Datasheet

NTC Power Thermistor

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NTC POWER THERMISTOR, SCK SERIES
Meritek
Thermal dissipation coefficient( δ )
The thermal dissipation coefficient is the ratio, normally
expressed in milliwatts per degree C (mW/oC), at a specified
ambient temperature, of a change in power dissipation in a
thermistor to the resultant body temperature change.
(δ =VXI/T)
Thermal time constant( t )
The thermal time constant is the time required for a
thermistor to change 63.2 percent of total difference between
its initial and final body temperature when subjected to a
step function change in ambient temperature under zero-
power condition and is normally expressed in seconds.
Material constant(B)
The material constant of a NTC thermistor is a measure of
its resistance at one temperature compared to its resistance
at a different temperature. Its value may be calculated by the
formula shown below and is expressed in degrees kelvin
(oK ). The reference temperature used in this formula for
determining material constant rating of Meritek’s thermistor
is 298.15'oK and 323.15 oK B=Ln(R1/R2)/( 1/T1-1/T2 )
Temperature coefficient of resistance (α)
The temperature coefficient of resistance is the ratio at a
specified temperature, T, of the rate of change of zero-power
resistance with temperature to the zeropower resistance of
the thermistor. The temperature coefficient is commonly
expressed in percent per degree C(%/oC). α =I /R dR/dT
Surge energy
Surge energy is the maximum energy of pulses.
The thermistor is capable of tolerating surge energy more
than 1000 times with the resistance changing rates within
± 10%. This energy varies with voltage and capacitance.
Storage temperature range:- 40 to +125 oC
Operating temperature range:- 30 to +125 oC
DERATING CURVE OF SURGE CURRENT
LIMITING THERMISTOR
The maximum power of a thermistor will decrease with the
change of ambient temperature.(See Fig.G)
O.03
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NTC

SCK15-048 Datasheet Preview

SCK15-048 Datasheet

NTC Power Thermistor

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www.DataSheet.co.kr
NTC POWER THERMISTOR, SCK SERIES
Meritek
Part No
Zero Power
Resistance
at 25oC
(Ù)
SCK05-052
SCK05-101
SCK05-20X3
SCK08-042
SCK08-053
SCK08-063
SCK08-082
SCK08-102
SCK08-152
SCK08-201
SCK08-30X
SCK10-2R55A
SCK10-034
SCK10-035
SCK10-044
SCK10-054
SCK10-083
SCK10-103
SCK10-122
SCK10-123
SCK10-133
SCK10-152X
SCK10-162
SCK10-162X
SCK10-202
SCK10-252
SCK10-302
SCK10-472
SCK10-501X
SCK10-502
SCK10-801
SCK10-1001
SCK10-1201
5
10
20
4
5
6
8
10
15
20
30
2.5
3
3
4
5
8
10
12
12
13
15
16
16
20
25
30
47
50
50
80
100
120
O.4
Max.
Steady State
Current
at 25 oC ( A )
Approx.
Resistance
at Max.Current
at 25 oC ( mÙ )
Thermal
Dissipation
Constant
( mW/ oC )
2 429 14
1
1126
15
0.3
5560
14
2 441 17
3 261 17
3 283 17
2 520 16
2 542 17
2 548 15
1
1544
17
0.5
4094
16
5 120 18
4 156 18
5 119 18
4 161 16
4 180 17
3 278 17
3 297 17
2 512 18
3 301 18
3 356 18
2.5 442 17
2 604 18
2.5 442 16
2 646 17
2 674 17
2 700 17
2 720 18
1.5
1170
18
2 813 18
1
2236
17
1
2318
17
1
2406
19
Thermal
Time
Constant
( Sec. )
17
17
22
31
36
38
36
38
38
41
33
46
45
45
40
33
43
46
50
50
49
51
55
45
54
52
50
49
48
48
53
45
54
Operating
Temperature
(oC )
-40~+150
-40~+150
-40~+150
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
-40~+170
Datasheet pdf - http://www.DataSheet4U.net/


Part Number SCK15-048
Description NTC Power Thermistor
Maker NTC
Total Page 9 Pages
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