The G4OAC5A is a Digital AC Output Module used to control or switch AC loads. It provides up to 4000V of optical isolation (transient) between field outputs and the control side of the circuit and features zero voltage turn-on and zero current turn-off. It is equivalent to single-pole, single-throw, normally open contacts (Form A, SPST-NO). It is equipped with a 4A fast-blow fuse. The fuse breaking capacity is 40A at 250VAC. Current should be limited to prevent the short-circuit current from exceeding the rated breaking capacity of the fuse. The typical applications for this AC output module includes switching loads such as AC relays, solenoids and indicators.