Mitsubishi TH Series Thermal Overload Relay

Overload and phase failure protection, 0.12 to 400A current range. Direct mounting with contactors or standalone configuration.

This model has 166 variants.
Effective Sept 11th, 2025 Mitsubishi has added a 9.75% surcharge to this product. The surcharge will appear as a separate line item on each sales order.
Highlights...

Features

  • Current Range: 0.12A to 400A (depending on model size)
  • Voltage Ratings: Compatible with 220-690V AC systems
  • Auxiliary Contacts: 1NO + 1NC
  • Screw-clamp connections with finger protection
  • Operating Temperature: -10 to 40°C
    • Standard rated at 20°C
  • IP20 rated enclosure
  • Certifications: UL available with select models

The Mitsubishi TH Series Thermal Overload Relay provide highly customizable protection solutions for different motor types and operating conditions, from basic overload protection to specialized applications requiring phase monitoring or quick-trip functionality.

Standard TH variants are designed for general overload and constraint protection of motors in standard applications. TH-__KP variants handle overload, constraint, and open-phase protection for motors requiring phase failure detection. TH-SR variants protect motors with long startup times and applications involving frequent inching and intermittent running operations. TH-T_FSKP variants provides protection of submersible motors and explosion-proof motors where fast response is critical. TH-FS variants offer specialized protection for compressor motors used in refrigerators and refrigeration systems.