DPSTDPDT

DPSTDPDT is not a standard term in electronics, and its meaning can be ambiguous. In many contexts it may refer to a device that combines DPST and DPDT contact configurations in a single actuator or to a ganged arrangement of two switches controlled together. Some datasheets use DPST/DPDT or DPST–DPDT to indicate that a component provides both double-pole single-throw and double-pole double-throw functionality in a single package or in related sections.

DPST stands for double-pole single-throw. It switches two independent circuits with one actuator, and each circuit has a single output position. A typical DPST device has four terminals (two inputs and two outputs) and provides simultaneous on/off control for both poles.

DPDT stands for double-pole double-throw. It also switches two independent circuits, but each pole can connect to one of two outputs, giving six terminals (two commons and four throws). DPDT switches can be used to reverse polarity, change signal paths, or implement other two-path routing.

If a device is described as DPSTDPDT, it may include a DPST section and a DPDT section sharing the same actuator, or a dual-switch assembly with both types in one package. Such configurations enable different switching schemes in a single actuator—for example, powering two circuits while also directing a signal along one of two paths.

Common considerations include voltage and current ratings, insulation between sections, mechanical life, mounting method, and whether the sections are mechanically linked. When encountered in specifications, the exact behavior should be verified in the manufacturer’s datasheet to determine how the DPST and DPDT aspects are implemented.