(Single Pole, Single Throw). One pole per direction. Can be normally closed or normally open.

(Single Pole, Double Throw). One pole, two directions. There is one common contact that can switch with two directions.

(Double Pole, Double Throw). Two poles for two directions, i.e. 2 groups of switches. In fact, these are two SPDT relays in one, but having a common coil.

Dual Pole, Single Throw relay. Section under development.

Latching relays maintain their state after power is removed. High reliability for critical applications.

Trimmer and fixed vacuum ceramic condensers with optional air and water cooling.