KT Thermistor (high accuracy, SMD chip type)

The KT series thermistor features high accuracy with tight resistance and B-value tolerances of (±1%). The KT thermistor is a high performance, high reliability chip thermistor which complies with EIAJ standards (dimensions: 1005, 1608). SEMITEC’S KT thermistors are fully compliant with RoHS DIRECTIVE2011/65/EU.


Office automation equipment, communicationequipment, IT equipment, mobile devices, battery packs, LCDs, hybrid ICs, AV equipment

Part Number



Part No. R251 R25Tolerance B-value2 Dissipation factor
Thermal time constant s3 Rated power
mW at 25℃
Operating Temperature range
103KT1608T 10kΩ ±1% 3435k±1% approx. 0.9 approx. 5 4.5 −40〜+125
503KT1608T 50kΩ 4055k±1%
104KT1608T 100kΩ 4390k±1%
103KT1005T 10kΩ 3435k±1% approx. 0.7 approx. 2.2 3.5

1. Rated zero-power resistance at 25℃

2. B-value determined by rated zero-power resistance at 25℃ and 85℃

3. Time required to reach 63.2% of temperature difference. Measured in still air.