Series RD

Copyright ©, Portage Electric Products, Incorporated
All rights reserved.

These one-shot mounted thermal fuses operate when the operating or ambient temperature rises above a pre-set level. At that point the organic pellet melts causing the barrel spring to expand from the contacts and opening the circuit.


  • Series D thermal fuse custom mounted into ceramic base.
  • Single operation device. Once activated the electrical circuit remains permanently open until fuse is replaced.
  • Quick Break: When operating or ambient temperature rises above calibration point, organic pellet quickly melts breaking circuit.
  • Cost-Effective: Thermal fuses are among the least expensive circuit protection devices available.
  • Custom Configurations: Please contact us regarding termination options.

Contact Ratings

  • For a complete listing of all contract ratings, please refer to the PDF data sheet.

Calibration Range

  • Calibration Temperature Range: Pellet can be set to melt at temperatures ranging from 72°C to 240°C.

Standard Marking System

 Click Here