Schneider Electric SE XD040-9608 Latching Relay

Schneider Electric’s Square D Class 8501 latching relay, model XD040-9608, is a NEMA-style DC control relay with a mechanical latch that holds its contact state after coil power is removed. It uses a 115/125 VDC coil and is part of the XD040 family, Form 9608, within the 8501-Series latching relays. The latch mechanism is coupled to a separate unlatch coil; the unlatch coil is rated for intermittent duty and should be wired through a normally open contact if the input signal is maintained. This arrangement provides memory functionality in industrial control panels, allowing the relay to switch and then retain that state without continuous energization. Typical applications include panel-mounted control circuits, interlocks, sequencing, and safety interlocks in machinery, conveyors, and automated equipment that requires a latched input or state retention with a DC control signal.