Siemens 3SU1000-4BC01-0AA0 Key-Operated Switch

Siemens 3SU1000-4BC01-0AA0 is a SIRIUS ACT RONIS key-operated switch designed for 22 mm round control panel mounting. It comes with lock number SB30 and two keys, offering two switching positions (O and I) in a momentary-contact configuration, with a 45° actuating angle and a key-removal option (O) for secure operation; optional locks SB31, 421, and 455 are available. The front ring is included as standard, the body is black plastic, and the actuator assembly is designed for rugged environments with IP66, IP67, and IP69K protection (terminal protection IP20). Typical operating frequency is up to 1,800 cycles per hour, and the mechanical life is rated around 1,000,000 operating cycles, indicating high durability for repeated cycling in control applications. The unit weighs about 0.055 kg, and it is cataloged as 3SU1000-4BC01-0AA0 within Siemens’ Industry Mall lineup for Ronis key-operated switches.