Main parts

1) Shell  2) Base  3) Bimetal disc  4) Movable contact

5) Temperature calibration plate  6) Static contacts

Construction

The movable contact are welded to the bimetal sheet and then wel-ded to the iron bracket. The stationary silver contact and base are molded into a whole, after the current passes through the temper-ature calibration plate and the bimetal disc, it forms a loop from the moving contact to the static contact.