Siemens 3SB3500-4FD51-ZB01

The Siemens 3SB3500-4FD51-ZB01 is a key-operated switch designed for control applications requiring secure and precise operation. This model features a three-position mechanism where the key can only be removed in the first position, ensuring controlled access. It operates with a 50-degree angle in both directions—left for a maintained position and right for a momentary action. The switch comes without a holder and has a compact 22mm mounting diameter. Distributed by BSP Automation, this switch offers reliable performance for various industrial automation setups.