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1/2" Disc Thermostats

ATC Semitec stocks a comprehensive disc thermostat range from leading manufacturers Asahi Keiki and PEPI EAW.

Snap-action 1/2″disc bi-metal thermostats (or button thermostats) provide very reliable, cost-effective temperature control and thermal protection for domestic appliances and electronic circuits with a choice of manual or automatic reset available. These thermal switches can be supplied with tight tolerances and narrow differentials to make very effective thermostats; or they can be calibrated with wide differentials to provide over-temperature protection as either a thermal cut-out or a thermal limiter.

Snap Disc Thermostat: Manual or Automatic Reset

We can offer accurate temperature control from -20°C to +250°C, high switching capacities up to 16A/250VAC and numerous fixing and termination options.  Automatic reset, manual reset and electrical self-hold options make this a very flexible range of disc thermostats.  One-shot, single operation bi-metal thermal fuses and S.P.D.T. versions with “change-over” contacts are also now available.  Our disc stats carry both VDE and UL approvals.

Amongst other applications, snap-action disc thermostats can be used for surface and air-sensing thermal switch applications typically within:

  • Office automation products
  • Small domestic appliances
  • Large domestic appliances
  • Electric heating appliances

For further technical information on Thermostats, 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.

  • 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-625 Ceramic 1/2"Disc Thermostats

    Asahi US-625 ceramic 1/2″disc thermostats offer high temperature control upto 250°C range.  By choosing a narrow or wide differential, the US-625 can either be a thermostat or a thermal cut-out.

    • Calibration range +10°C to +250°C (T260 housing)
    • Automatic reset (N/O, N/C contact options)
    • Loads up to 10A/250VAC
  • PEPI EAW KO/KS Automatic Reset 1/2"Disc Thermostat

    Our PEPI EAW KO & KS series 1/2″ disc thermostats have the widest range of calibrations, fixings and termination options.  Both break-on-rise and make-on-rise contacts are equally available.

    • Range -20°C/+190°C (T200 Rating)
    • N/C and N/O Contact Operation
    • Loads up to 16A/250VAC
  • PEPI EAW CO/CS High Temperature 1/2" Disc Thermostats

    PEPI EAW CO & CS ceramic 1/2″disc thermostats offer high-temperature control or sensing upto 350°C.  Various flange types and numerous terminations makes this a flexible range to suit your application.

    • Range; -20°C/+350°C (T350 rating)
    • Normally-open or normally-closed contacts
    • Switch capacity up to 16A/400VAC
  • Asahi US 118 Hermetic 1/2
    Asahi US-118 Hermetic Thermostats

    Asahi US-118 hermetically-sealed thermostats are ideal for high-specification applications and are totally moisture resistant.  Available with calibrations from 0°C to 250°C and various mounting flanges.

    • Hermetically sealed disc thermostats
    • Temperature set-points; From 0°C to 250°C
    • Contact ratings; 3A/125VAC (1A/24VDC)
  • 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