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Working Principle:
Normally closed contact system, which is operated by a snap action of bimetal disc according to calibrated, and is operated by the wire according to checked, so it is sensitive to temperature and the current. When properly applied, protector shuts off the motor when temperature exceeds maximum safe level due to an overheating condition. It has the steel case and is easy-to-install, but can bear big current.
Using Range:
This type thermal protector motor protector is widely applied to overheating protection in Split-phase motors, Capacitor start motors, Ballast protection, Transformer, Automotive motors, Solenoids and Appliances etc.

Specification:
Electrical Ratings: AC 250V/50A,
Circuit Control Mode: NC
Rated Action Temperature: 60---170º C (Designed by user's requirements)
Open/close Tolerance: ± 5
Action Cycle: No less than 10, 000 times
Dielectric resistance: Not Broken within 2000V / 1 minute, No flash.
Normal Isolated Resistance: >100M Ω