Allen-Bradley 800MR-B4 Push Button is a grey, 22 mm round operator from Rockwell Automation’s 800MR push-button family. It provides momentary push action, making a circuit only while the button is pressed and returning to the resting position when released. As part of the 800MR family, it is designed for use with compatible 800MR contact blocks to realize the desired electrical function in modular push-button configurations, with the B4A variant identifying a specific option within that family. The round operator with a grey bezel helps visually distinguish the control in assemblies, and the 22 mm format aligns with the standard size used for compact, reliable actuation in industrial control applications.
