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SCK13-104 Dataheets PDF



Part Number SCK13-104
Manufacturers NTC
Logo NTC
Description NTC Power Thermistor
Datasheet SCK13-104 DatasheetSCK13-104 Datasheet (PDF)

w w w D .a S th c k e o r . e t 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) Surge energy Surge energy is the maximum energy of pulses. The thermistor is capable of tolerating surge energy more than 1000 times with the r.

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w w w D .a S th c k e o r . e t 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) 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. 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 zeropower condition and is normally expressed in seconds. Storage temperature range:- 40 to +125 o C o Operating temperature range:- 30 to +125 C DERATING CURVE OF SURGE CURRENT LIMITING THERMISTOR The maximum power of a thermistor will decrease with the change of ambient temperature.(See Fig.G) 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/R 2)/( 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 O.03 w /D w / p : t h a w t s D h p e . d e a f t S h e 4 e U tn / e .t www.DataSheet.co.kr NTC POWER THERMISTOR, SCK SERIES Meritek Zero Power Resistance o at 25 C (Ù) 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 Max. Steady State Current o at 25 C ( A ) 2 1 0.3 2 3 3 2 2 2 1 0.5 5 4 5 4 4 3 3 2 3 3 2.5 2 2.5 2 2 2 2 1.5 2 1 1 1 Approx. Resistance at Max.Current o at 25 C ( mÙ ) 429 1126 5560 441 261 283 520 542 548 1544 4094 120 156 119 161 180 278 297 512 301 356 442 604 442 646 674 700 720 1170 813 2236 2318 2406 Thermal Dissipation Constant o ( mW/ C ) 14 15 14 17 17 17 16 17 15 17 16 18 18 18 16 17 17 17 18 18 18 17 18 16 17 17 17 18 18 18 17 17 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 o (C ) Part No 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 SCK10-1.


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