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SEKI ST-22 Bimetal Thermal Switch

SEKIs ST-22 has a larger contact rating compared to the ST-30, which is accompanied by a slightly larger size. It uses a snap action bimetal strip to allow temperature control of your device over an array of voltage as currents, preventing over heating and thermal damage by stopping current flow.


  • Electric Motors
  • Battery Chargers
  • Transformers
  • Power Supplies
  • Heating Pads
  • Fluorescent Ballasts
  • OA-Machines
  • Solenoids
  • LED Lighting


  • Snap Action with Automatic Reset
  • Superior Heat Response
  • Contact Rating: 7A/250V AC (10,000 cycles)
  • Temperature Setting Range: 50℃ to 150℃
  • UL/cUL, VDE, CQC, KC
  • PBT Resin Case with Epoxy Sealing
  • IP45 rating
ST-22 Drawing 1