Airtronics TDQ100125C4A Solid State Timer Relay

The AIRTRONICS TDQ100125C4A is a solid-state timer relay designed for precise, maintenance-free time-delay switching in industrial control systems, delivering repeatable delays without moving components. Operating from 120 VAC with a 50/60 Hz supply, it features a 10 A relay output suitable for 1/3 HP motors at 120 VAC, and its timing functions can be configured as on-delay, off-delay, or interval via a solid-state timing circuit that emphasizes high repeatability and long service life. Mounting options include panel or socket mounting depending on configuration, and the device is engineered for continuous-duty operation in HVAC equipment, pumps, compressors, conveyors, and process machinery within industrial control panels. As a legacy model available through surplus channels, the TDQ100125C4A is commonly referenced alongside replacements such as Macro-matic TR Series Timer Relay, Allen-Bradley 700-RTC Solid State Timer Relay, and Eaton TR Series Timing Relay.