This device operates with the automatic reset option. Further variations of this device are the TK34M with the manual reset option, and the TK34R with the resistance based internal heater. This thermostat can be used in high current applications (up to 45A).

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 Your specific technical needs, assuring maximum design flexibility and usage in broad range of temperature control applications for consumer, industrial and commercial products.

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Parameter	Value
Rated voltage, V, not more	~250
Rated current, A, at power coeff. 0.95, not more	25
Maximum current, A, at power coeff. 0,95, not more	45
Number of automatic cycles, at rated current 25 А and power coeff. 0,95, not less than	100000
Number of automatic cycles, at rated current 45 А and power coeff. 0,95, not less than	6000
Operating temperature, °C	-25°C — 120°C
Tolerance of operating temperature, %, but not less than °C	±3; ±5
Reset temperature, lower than operating temperature on, °C not less than	10
Transient resistance, Ω, not more	0.05
Contact operating time, ms, not more	3
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