The 01002900 analog temperature limiter operates on the Curie temperature principle of soft magnetic ferrite. When the sensed temperature reaches the ferrite's Curie point, the material instantly loses magnetic permeability. Under internal spring force, the soft magnet separates from the hard magnet, and a push rod actuates a mechanical switch to cut the heating circuit — providing self-resetting thermal protection with zero electronic components.

How does the Curie-point mechanism ensure reliability?

The soft ferrite is formulated with a precise Curie temperature matched to the application's protection threshold. Below that temperature, magnetic attraction holds the switch closed. At the Curie point, permeability collapses — spring force overcomes the weakened magnetic hold and the switch opens. As the system cools, magnetism returns and the mechanism resets automatically. This purely physical process is immune to electrical noise, drift, and component aging.

Where is this limiter typically installed?

Primary applications are mechanical rice cookers, electric woks, gas rice cookers, and household appliances needing reliable over-temperature protection. Its simple construction, low maintenance cost, and wide 50–280°C coverage suit high-volume appliance manufacturing where reliability and unit cost are decisive.