Disc Thermal Cut-Outs

ATC Semitec stock a range of snap-action 1/2″ disc-style thermostats from ASAHI which provide very reliable, thermal protection for domestic appliances and electronic circuits.

The typical application of a thermal cut-out is to keep a safe temperature below a particular threshold during abnormal operating conditions.  Also known as a thermal limiter or thermal switch, they normally open at high temperatures during a fault condition and then reset when the product temperature falls to a safe, predefined level.

These thermal switches can be configured with wide differentials to provide over-temperature protection as thermal cut-outs or thermal limiters.

Automatic reset, manual reset and electrical self-hold options make this a very flexible range of disc thermostats. One-shot, single operation bimetal thermal fuses and S.P.D.T. versions with “change-over” contacts are also now available.

From EAW there are also automatic reset, manual reset and electrical self-hold options which help to make this a very flexible range of disc thermostats.

For further technical information, see our Frequently Asked Questions section

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

  • Products
  • FAQs
  • Compact, cost- effective 1/2
    ASAHI US-622 1/2" Disc Thermostats/Thermal Cut-Outs

    The Asahi US-622 disc thermostat is the workhorse control in the range.  Compact, high quality and competitively priced thermostats which can also be configured to operate as thermal cut-outs.

    • Calibration range: +10°C to +185°C (T200 housing)
    • Loads up to 16A/250VAC
    • Control, cut-out and one-shot options
  • ASAHI US-603 1/2"Disc Manual Reset Cut-outs

    Asahi’s US-603 manual reset thermal cut-out provides superior non-cycling thermal protection.  Various fixings and terminal types means the US-603 is a versatile thermal protector.

    • Temperature range: 50°C to 160°C
    • Non-cycling thermal protection
    • Switches loads up to 10A/250VAC
  • EAW SO Self-Hold Thermal Cut-Out

    The SO series self-hold thermal cut-outs have an internal heater to stop them from auto-resetting.  This means they can be located remotely and reset by switching off the applied voltage.

    • Internal heater stops auto-resetting
    • Range -5°C/+200°C (T200 Rated)
    • Multi-voltage options (12V~240V)
  • KB Manual Reset Thermal Cut-outs

    KB series 1/2″disc manual-reset thermal cutouts offer extra thermal protection where auto-resetting devices are not desirable.  Wide range of mounting options and terminal types.

    • Range 30°C to 190°C (T200 Rating)
    • Manual-reset function
    • Loads up to 16A/250VAC
  • High quality snap action bimetal disc thermostat. tight differential control. IP67 rating | ATC Semitec for advice and samples
    ASAHI US-628 Waterproof Thermostats

    ASAHI US-628 disc thermostats are encapsulated, waterproof versions with integral lead-wires.  They have an automatic reset function and are available with normally-open or normally-closed contacts.

    • IP67 rated drip-proof housing
    • Max operating temperature 130˚C
    • Loads up to 5A/250VAC
  • Slim space-saving snap-action thermostat. TO-220 case. UK stock from ATC Semitec
    Asahi US-802 TO-220 Miniature Thermal Switches

    The Asahi US-802 miniature thermal switch offers a neat solution for heat-sink and power component monitoring applications. Both normally-closed and normally-open contact types are readily available.

    • TO-220 case, M3 mounting hole
    • N/C and N/O contact options
    • Range 40°C to 120°C in 5K steps