Distributors Stock

Need more information?

Contact us to request pricing, availability and customization options

Contact Us


  • Plug-on thermal motor protector for compressors
  • Protects compressors for refrigerators, freezers, dehumidifiers, water coolers, vending machines, and similar refrigeration applications
  • Compatible with PTCR starters and electromechanical relays
  • Product designed and manufactured in an environment of Total Quality Control
  • Applicable to compressors manufactured around the world
  • Conforms with worldwide certification agency standards

When the disc snaps, it actuates the spring arm located above the disc, opening the contact circuit which shuts off the compressor motor. The operating parameters of the 4TM are not affected by contact wear because the contacts are not part of the resistance circuit and are not part of the temperature calibration mechanism. The design features of the 4TM performance and reliability are the following:

  • The variability to increase offtimes allows for matching and compatibility with PTCR starters
  • Reduced temperature drift over life cycles
  • Repeatability of trip time and ultimate trip
  • Resistance to physical and thermal shock