Click to expand full text
QB210T
INC.
QBAR ® NORMALLY-CLOSED SWITCH
DESCRIPTION
QBAR® ICs provide a 3-terminal semiconductor switch that functions as: • a solid-state normally-closed switch • a non-inverting digital transistor • a solid-state replacement for a normally-closed, non-isolating relay. QBAR® ICs do not require a separate power supply lead. This makes possible: • simplified control wiring • replacement of normally-closed D.C. relays with highly reliable solid-state devices • improved fail-safe performance in the event of lost control power, severed or shorted control wires.