SDC 423PU Push to Exit Switch, 1-3/4" x 1" Button-Integrated Pneumatic, 1-180 Seconds, 3 Amp, Stainless Steel

The SDC 423PU is a durable stainless steel push‑to‑exit switch designed for secure egress control in access control and security systems. It features an integrated pneumatic timer adjustable over a range of 1 to 180 seconds, allowing the exit circuit to remain active for the set interval after actuation. The 1‑3/4" × 1" rectangular button is engineered for positive tactile feedback and user accessibility. Rated for up to 3 A at typical voltages (e.g. 12V/24V DC), the unit uses DPST contacts to control exit relays or locks. Its housing and faceplate resist tampering and vandalism, making it suitable for high‑traffic or critical installations. Wiring is via leads behind the plate, and installation aligns with standard single‑gang mounting. Because it is pneumatic rather than electronic, its timekeeping is stable and unaffected by power fluctuations. Overall, the 423PU is chosen where robustness, adjustability, and longevity in security environments are required.