This device is operating with a resistance based internal heater. Further variations of this device are the TK34A with the automatic reset option, and TK34M with the manual reset option.

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	16
Maximum current, A, at power coeff. 0,95, not more	25
Number of automatic cycles, at rated current 25 А and power coeff. 0,95, not less than	100000
Operating temperature, °C	-25°C — 120°C
Tolerance of operating temperature, %, but not less than °C	±3; ±5
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