Archives: Tooltips

Independent + Dependent Illumination Independent illumination means that a separate electrical signal or switch powers the lamp, regardless of what function the switch is performing at any one time. For example, the independent lamp might be wired to the dash lights of a vehicle to make the switch visible in the dark. Or it could be used as a driving … Read more

Dependent Illumination Dependent illumination means the lamp in the switch is powered by the load. Therefore, when the switch is off, the lamp is off. When the switch is on, the lamp is illuminated. This makes it easy to see when the load is active. These switches are also available as ON/ON and ON/OFF/ON with dual dependent illumination.

Double Pole, Single Throw (DPST) Switch controls two circuits simultaneously. Circuits are ON at the same time, OFF at the same time, and may be of different voltages from different sources.

Single Pole, Double Throw (SPDT) Switch controls two single wire circuits, permitting only one circuit to be energised at a time.

Single Pole, Single Throw (SPST) Switch controls a single wire circuit.