PRF series / PTC thermistors
SMD type / for overheat sensing

PRF Series
Exploiting the PTC characteristic (a sharp increase in resistance above a certain temperature), the PRF series chip PTC thermistors are used for overheat sensing in FETs, power ICs, and other heat generating areas. Use of the sharp change in electrical resistance translates into outstanding noise resistance. Sharp changes in resistance make it possible to accurately detect overheating in multiple areas using a very simple circuit connecting PTC thermistors in series. 
This allows the customer to reduce the number of IC ports, thereby downsizing equipment.

     Application Note

Recommended sensors >

  Basic Knowledge    How to Select   
Part Numbering   
  PRF15-1kΩ Series  :1.0x0.5mm/0.4x0.2inch,Resistance 1kΩ(25℃)
  PRF15-10kΩ Series  :1.0x0.5mm/0.4x0.2inch,Resistance 10kΩ(25℃)
  PRF18-470Ω Series  :1.6x0.8mm/0.6x0.3inch,Resistance 470Ω(25℃)
  PRF18-470Ω Series
 (Tight Tolerance Type)
:1.6x0.8mm/0.6x0.3inch,Resistance 470Ω(25℃)
   Tight Tolerance Type
  PRF21-470Ω Series  :2.0x1.25mm/0.8x0.5inch,Resistance 470Ω(25℃)

SubTitleIconNo01 PRF15-1kΩ Series

SubTitleIconNo02 PRF15-10kΩ Series

SubTitleIconNo03 PRF18-470Ω Series

SubTitleIconNo04 PRF18-470Ω Series (Tight Tolerance Type)

SubTitleIconNo05 PRF21-470Ω Series