Siemens 3SU1050-4BF21-0AA0

The Siemens 3SU1050-4BF21-0AA0 is a metal key-operated switch designed with a 22 mm round bezel and a polished finish. This durable switch features two positions—on and off—with a 90-degree actuation angle and latching mechanism for secure operation. It comes with two keys and offers key removal in the “on” position. Additional locking options, such as SB31, 421, and 455, are also available. This reliable key switch is distributed by BSP Automation, providing a trusted solution for controlling equipment in industrial settings.