Noun
SPST (plural SPSTs)
Initialism of single pole, single throw: a type of electrical switch.
Equivalent to two SPST switches or relays actuated by a single coil. Source: Internet
The following designations are commonly encountered: * SPST – Single Pole Single Throw. Source: Internet
It is a SPST N.O. with the th… Source: Internet
This is a heavy duty SPST toggle switch - your basic on/off toggle. Source: Internet