Product Specifications

Automotive Bimetal Disc Switches

The Therm-O-Disc line of bimetal disc temperature switches is widely used in automotive temperature control applications. These controls provide high-speed contact separation, resulting in exceptional life characteristics. Automotive Temperature Switches are provided in a variety of configurations and calibrations to meet your specific requirements in a wide range of applications.

Features and Benefits:

• Rugged construction ensures reliable operation in automotive applications.

• High-speed contact separation and contact force ensure long contact life and reliable operation.

• Epoxy sealed controls protect against environmental extremes.

• Vibration resistant construction provides for high reliability.

• A wide variety of custom configurations and mountings provide unsurpassed design flexibility.

• 100% tested for calibration and electrical operation.

Applications

Therm-O-Disc temperature switches can be used in a variety of automotive temperature sensing applications. Each control incorporates high contact force, epoxy sealant and vibration resistant construction which meets ASTM salt spray and other environmental test requirements.

Typical applications include:

• Control of electrically driven coolant fan motors found in most smaller cars which utilize front wheel drive, transverse mounted engines. The switch can carry the electrical load of the coolant fan directly, thus eliminating the need for a fan relay.

• Control of early fuel evaporation heater relay and turn-off of the early fuel evaporation heater on coolant temperature rise. These switches are designed to provide maximum sensitivity and quick thermal response to changes in temperature.

• Ambient air sensing for air conditioning systems, sensors for engine coolant and emission, and driveability systems. Customized mounting capabilities can satisfy airstream, surface, air cleaner or stud mount requirements.

• Control of such applications as cold engine lockout and engine coolant fans which demand heavier electrical loads up to 14VDC at 10 amps.

Switch Actions:

Automotive Temperature Switches are manufactured with a single pole, single throw (SPST) switch action. Switches can be provided normally open or normally closed based upon the application requirements. The calibrated discs used in the switches are recognized for their inherent reliability and calibration stability.