Struthers-Dunn A42-010A Time Delay Relay Solid State Timer

The Struthers-Dunn A42-010A Time Delay Relay is a solid-state timing module that delivers a defined ON-delay after 120 VAC is applied, enabling precise sequencing in control circuits. The unit is described as a plug-in device in an 11-pin format and is designed to operate from a 120 VAC input, aligning with Struthers-Dunn's legacy of timer-relay products. Timing is specified as 0–10 seconds in some listings, while others cite a fixed 10-second interval, and potential buyers should verify the exact timing behavior when sourcing replacements. The A42-010A is listed as discontinued by the manufacturer, which can affect availability and compatibility planning in ongoing installations. As a dedicated timing element within a control loop, it enables a timed response in circuits that require a timed energization sequence, without relying on mechanical timers. When integrated into a panel, verify the pinout and mounting compatibility to ensure a secure fit and correct timing operation, and consider stock considerations given its discontinued status.