Seki ST-22 thermal protector for motors

South Korea SEKI ST-22 miniature thermal protector/temperature control switch 40-130 degrees normally open/normally closed
SEKI ST-22 temperature protection is composed of dish-shaped highly sensitive bimetallic components, moving contacts, static contacts, fixed bottom plate, shell and temperature-resistant wires. During operation, the bimetallic element is in a free state, the moving contact and the static piece are closed, and the circuit is conducted.

Electronic equipment and industry;
Provides reliable overheating protection in household appliances and similar applications
Technical parameters of SEKI ST-22 temperature switch (thermostat)
Rated voltage and current: 8A250V ~; 13A125V ~;
Rated cut-off temperature range: motor protector and temperature controller 45 ℃ ~ 150 ℃, every 5 ℃ is a grade
Breaking device with accuracy of ± 5 ℃.
Maximum temperature: 155 ° C
Contact life: Under the rated voltage and current load, the cycle action is more than 10,000 times.

Features:
No current effect design, the operating temperature of the product determines the sensitivity of the cut-off circuit. The user can choose the protector matching the motor according to the curve of the tripping current-time characteristic; Stable and reliable life; Fast action temperature; Power off quickly. The protector has two installation methods, which are directly bound to the coil winding and inserted into the preset slot of the plastic-sealed motor. The insulated plastic case can directly contact the metal part of the motor, and the thermal protector directly cuts off the power when the protected appliance is overheated.

● ST-22 Series Temperature Switch Description:
⑴ moment closing action
⑵ automatic recovery
⑶ completely waterproof hermetic
⑷ rapid thermal reaction
⑸ use of heat-resistant resin, no other insulation measures
5.1 Electric strength
a. thermal protector between the contacts of the cut should be able to withstand power frequency 50Hz, 600V voltage, which lasted 1min without breakdown flashover (leakage current setting 1mA).
b. between thermal protection lead or terminal and housing insulation can withstand the power frequency 50Hz, 1500V voltage, which lasted 1min without breakdown flashover (leakage current setting 1mA).
5.2 insulation
Under normal conditions, between the lead (terminal) and the insulating sleeve insulation resistance greater than 100MΩ (DC500V megger).
5.3 electrical life
Thermal protection at AC 50Hz, voltage 220V, power factor COS∮ = 0.75-0.8 conditions, with the rated current, test 2000 times, operating temperature should be ± 5 ℃ or ± 5% of the initial value (whichever the larger value) range, the contact welding does not occur, continue after the heat test 4000 times
Protection should still work reliably.