Siemens 3SB3645-0AA31 Push Button With Contact Block

Siemens 3SB3645-0AA31 is a 22 mm metal-round complete unit pushbutton with a flat yellow actuator, designed for panel mounting in control cabinets. The assembly features a silver metal front ring and a metal holder, delivering a ready‑to‑wire pushbutton unit.

It provides a momentary operation with a single normally open (NO) contact in the contact block and includes a lampholder with an integrated LED for visual indication. The device is powered from 24 V AC/DC and uses screw-type terminals for its electrical connections. The actuator is plastic, while the front ring and holder are metal, making this 22 mm pushbutton suitable for standard 22 mm cutouts and mounted in compatible Siemens enclosures.