Low-Profile Thermostats

ATC Semitec’s range of low-profile thermostats offers users a unique combination of load and switching life-cycles in a conveniently thin package.  These thermostats have been expertly engineered to offer a minimum 100,000 contact operations at loads of up to 4A/250VAC.  The main four product types in this low-profile category are as follows;

PEPI J(A) Thermostats  –  This is the lowest profile thermostat in this category and has a live metal-case design.  The PEPI J(A) can be supplied with calibrations from 50°C to 160°C (in one degree steps) with a set-point tolerance of ±5K.  The temperature differential (or hysteresis) can be either 2K-10K or 5K-15K depending on the calibration setting.  Other temperature differentials also available according to the limits of the bimetal technology and temperature set-point.

Asahi US-630 Thermostats  –  Asahi’s US-630 plastic case thermostats use tried and tested 1/2″disc bimetal technology in their design.  The housing is only 6.1mm thick and a single thermostat or thermostat/thermal fuse combination can be supplied in this design.  Multiple thermostats can be supplied wired in series to give differing control levels with calibrations ranging from 0°C to 120°C.  Thermal differentials are typically 10±5K depending on the ultimate calibration setting.

Asahi US-638 Thermostats  –  Asahi’s US-638 thermostats are even thinner than the US-630 type at only 5.1mm thick.  They also use the same ultra-reliable 1/2″disc bimetal technology and can switch up to 100,000 cycles at 4A/250VAC.   Calibrations from 30°C to 100°C with tolerances of ±5K and thermal differentials of 10±5K are readily available.  The US-638 thermal control can also be supplied with fixing holes to help secure the thermostat in a precise location.

Matsuo MQT8K Thermostats  –  The MQT8K thermostat is the thinnest in the Matsuo range and is a superior twin-bimetal temperature switch offering unparalleled thermal control.  These precision bimetal thermostats have an internal structure that offers a unique combination of tolerance, differential and repeatability.  The twin bimetal system minimises calibration drift and ensures a long contact life from 100,000 cycles to 1 million cycles depending on the applied load.  Calibrations from -10°C up to 110°C with tolerances as small as ±1.5K.

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.

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  • Snap-action, tight differential bimetal thermostat that gives excellent temperature control | ATC Semitec for samples and pricing
    PEPI J(A) Snap-Action Thermostats

    PEPI J(A)s are unique, snap-action control thermostats with a very narrow differential giving excellent temperature control.  They are rated for 100k cycles and are suitable for both 240VAC and 120VAC loads.

    • Only 4.1mm thick, live case design
    • Snap-action contacts, narrow differential
    • Calibrations from 55°C to 160°C
  • Matsuo MQT8K Compact, Low-profile Thermostats. Minimal long-term drift.
    Matsuo MQT8 Precision Thermostats

    Matsuo MQT8K or MQT8H thermostats are the smallest available in the range.  Very tight differentials and narrow tolerances make them ideal long-term temperature control solutions.

    • Small size: 6.4 x 12.5 x 34mm
    • Temperature set-points from -10°C to 110°C
    • Switching capacity of 1.3A/250VAC or 2A/125VAC
  • Low profile thermostat
    Asahi US-638 Thermostats

    Asahi US-638 thermostats are thinner versions of the US-630 at only 5.1mm thick.  The US-638 is designed for high-volume applications where cost and reliability are the main design criteria.

    • Only 5.1mm thick, insulated case
    • Snap-action contacts
    • Calibrations from 30°C to 100°C
  • Low-profile bimetal thermostats for controlling electric heating elements
    Asahi US-630 Thermostats

    Asahi US-630 thermostats are low-profile snap-action controls which are only 6.1mm thick.  They can be supplied fitted with an integral thermal fuse to offer ultimate in combined control and protection.

    • 6.1mm thick plastic case
    • Snap-action contact operation
    • Calibrations from 0°C to 120°C