The Siemens 3SU1000-5BM01-0AA0 is a versatile key-operated switch designed for robust performance in various industrial applications. This switch features a 22 mm mounting diameter, making it suitable for standard panel cutouts, and is crafted from durable plastic. It includes a lock number SSG10 and comes with two keys. The switch offers three distinct positions (I>O<II) for comprehensive control and is equipped with an IP66, IP67, and IP69K rating, ensuring protection against dust, water, and other environmental factors. Its mechanical service life is impressive, with up to 1,000,000 switching cycles, highlighting its reliability and longevity in demanding settings. This key-operated switch is an excellent choice for those seeking precise control with a high degree of protection and durability.