Allen-Bradley 849A-ZAD25 Pneumatic Timing Relay

The Allen-Bradley 849A-ZAD25 Pneumatic Timing Relay is a Bulletin 849A-series timer with an integral enclosure that provides a controlled pneumatic time delay for industrial control circuits. Designed for AC operation, it is commonly listed with a 600 VAC maximum rating and is housed in a NEMA 1 enclosure for indoor dry locations. The “-ZAD25” suffix identifies this specific model within the 849A family, and the enclosure configuration supports installation in standard control panels where a mechanical, air-driven delay is preferred for sequencing or interlock tasks. As part of the 849A line, it functions as an on-delay timing relay driven by a pneumatic timing mechanism, making it a durable option for applications requiring a defined delay between input and output actions in automation systems.