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SEKI Thermal Cut-Outs

SEKI Controls have 40 years experience specialising in the manufacture of bimetallic thermal protectors and thermostats.  They are ideal for limiting excessively high temperatures and thus protecting home and industrial appliances from internal and external damage.

The range of SEKI thermal cut-outs provides thermal protection and temperature control from -20°C to 180°C, with all protectors available in calibration steps of 5K and a set-point tolerance of ±5K.

The ST range of thermal cut-outs and temperature limiters have a range of features such as moisture resistance and customisable lead-wires.  Unlike thermal fuses, ST series cut-outs reset automatically, allowing them to be used as a permanent safety component.

As well as the plastic case ST series limiters, the metal case CK series cut-outs feature a patented double-coating technology to prevent varnish penetration, helping to maintain component quality.

Available with a wide temperature differential, these thermal cut-out sensors are ideal for solving a range of over-temperature problems, combined with small, compact designs allowing for simple and cost-effective integration into your product or appliance.

Call us today on 01606 871680 to discuss your application’s thermal protector requirements.  Using our extensive technical knowledge and innovative supplier base, we will work with you to provide the optimum solution for your product.

  • SEKI ST-12 Bimetal Thermal Switch

    The ST-12 is a typical bimetal thermal cut-out by SEKI, which allows accurate temperature control of your device.

    • Snap Action with Automatic Reset
    • Superior Heat Response
    • Temperature Setting Range: 60℃ to 150℃
  • Seki ST-22 Bimetal thermal cut-out - Overheat thermal protector
    SEKI ST-22 Bimetal Thermal Switch

    The SEKI ST-22 series thermal cut-out is their most popular device.  Manufactured in high volume, this highly reliable overheat thermal protector has become an industry standard for motors & transformers.

    • Snap-Action Bimetal, Automatic Reset
    • Temperature Setting Range: 50℃ to 150℃
    • PBT Resin Case – Epoxy Sealed
  • SEKI ST-30 Series Thermal Cut-outs
    SEKI ST-30 Bimetal Thermal Switch

    SEKI’s ST-30 thermal cut-out is the smallest in the series.  Available with calibrations from 50℃ to 130℃, the 5A/250VAC contact rating and compact size makes it ideal for integration into various products.

    • Snap-action, automatic reset control
    • Calibrations from 50℃ to 130℃
    • Insulated case with epoxy sealing
  • SEKI CK Series Thermal Protection Switches

    SEKI CK series bimetal cut-outs are used for over-temperature and over-current protection of electric motors, transformers and lighting ballasts.  Calibrations from 60℃ to 160℃.

    • Snap Action Contacts
    • Contact Rating: 8A/250V AC (6,000 cycles)
    • Temperature Setting Range: 60℃ to 160℃
  • SEKI HB Series Thermal Switch

    Snap action disc thermostat with a range of available brackets and terminals. They are designed to maintain a certain temperature range during operation.

    • Available with Both of Normally Closed Type and Normally Open Type Contacts
    • Single Operation Disc (SOD): Open on temperature rise, no closure unless the temperature 0℃ or below -35℃
    • Temperature Setting Range: -20℃ to 180℃