Operating principleThe very compact snap-action disk
thermostats are designed for current loads of up to 16A and have a wide range of
applications. These thermostats can be used in regulator applications to maintain a
constant temperature (normally closed or normally open); they can be used as thermal
switches in monitoring applications (normally closed or normally open); or they can be
used as limiters (normally closed) with mechanical resetting.
Mode of action
The termostats respond to a fixed temperature that is determined by a snap-action
bimetallic disk. The action of the bimetallic disk is mechanically transmitted to a bridge
contact via a transfer pin, so that the electrical circuit is either open or closed,
depending on the state of the bimetallic disk.
