Bimetallic temperature sensitive switch with automatic reset control - Thermorex TK77DC

This is a cyclic operating temperature sensitive device, which is intended to control the temperature between two particular values under normal operating conditions, automatically switching off or on the electrical circuit. It is designed to operate in AC and DC circuit applications and has high DC switching capacity.

This thermostat can be built to either open or close its electrical contacts as the temperature increases. Once the temperature of the bimetal disc has returned to the specified reset temperature, the contacts will automatically return to their original state.

Besides its variety of standard configurations the thermostat can also be customized to the specific technical needs of the customer, assuring maximum design flexibility and usage in broad range of temperature control applications.

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Parameter Value
Rated voltage, VDC, not more 12-60; 120; 150
Rated DC current, A, resistive not more 5; 1.5; 1
Rated voltage, VAC, not more 250; 440
Rated AC current, A, resistive not more 5; 2.5
Number of automatic cycles, for DC not less than 30000
Number of automatic cycles, for AC not less than 100000
Operating temperature, °C -40°C — 170°C
Tolerance of operating temperature, °C ±3
Reset temperature, lower than operating temperature, °C, by 10±3; 15±5; 20±5
Transient resistance, Ω, not more 0.05
Electric strength of insulation, V, not less than 1500
Insulation resistance, MΩ, not less than 50
Heating speed, K/min minimum-0.1; maximum-1.0
Degrees of protection provided by enclosure IP4X; IP65