- Thermal Protector
- Industrial Electrical
- DC Circuits – Miniature Circuit-Breakers For DC And Solar Generation
Thermal Protection
Heat is the silent killer of electronics. Langir snap-action thermostats cut power at preset temperature limits, protecting circuits before overheating becomes failure.
Thermal Protection Products
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Snap Action Thermostat
KSD301 snap action thermostat series is a small-size bimetal thermostat series with a metal cap,which belongs to thermal relays family. The main principle is that one function of bimetal discs is snap action under the change of sensing temperature. The snap action of disc can push the action of the contacts through the inside structure, then caused on or off of the circuits finally. The main characteristics are the fixation of working temperature, the reliable snap action, less flashover, longer working life and less radio interference. CQC, TUV Applicable
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Why Choose Langir Thermal Protection?
Overcurrent protection cannot see a blocked fan or a heat-soaked enclosure — only thermal protection can. The Langir Snap Action Thermostat uses a bimetallic disc that snaps decisively at its calibrated temperature, disconnecting power without chatter or drift, then automatically restoring it once conditions normalize. This crisp mechanical action needs no external power or control logic, making it the simplest reliable guard for motors, transformers, heaters, battery packs, and enclosed electronics. One small component stands between normal warmth and the temperature that ends your product's life.
Frequently Asked Questions About Thermal Protection
How snap-action thermostats work and where to apply them.
A bimetallic disc deforms with temperature and snaps over-center at the calibrated point, opening the contacts instantly — no gradual arcing, no electronics, no external supply.
Automatic-reset versions restore the circuit when temperature falls to the reset point; this suits equipment that should resume operation after cooling.
Motors, transformers, power supplies, heating appliances, battery systems, and sealed enclosures where fan failure or vent blockage can silently raise temperatures.
A breaker trips on current, a thermostat on temperature. Overheating often occurs at completely normal current levels, so the two protections cover different failure paths.
Choose a trip point above peak normal operating temperature but safely below component damage thresholds; Langir offers multiple calibrations and can advise on placement.
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