Siemens SIRIUS ACT 3-position Key Switch Head, Latching, 22mm Cutout, 3 Positions, SSG10 Key Type, 3SU1050-5BL01-0AA0

The Siemens 3SU1050-5BL01-0AA0 is a premium key switch head from the SIRIUS ACT series, engineered to deliver robust and reliable control within electrical panels and industrial automation systems. This three-position key switch head features a latching mechanism, ensuring that selected positions are maintained securely until intentionally changed by the user with the supplied keys.

Designed for compatibility with a 22mm panel cutout, this unit is well-suited for modern control cabinets and switchgear. The SSG10 key type interface provides access security and control, and the product is supplied with two Ronis keys for convenience and redundancy. Its high-gloss metal front ring and elegant black actuator ensure a professional and durable finish suitable for demanding environments.

Offering three clearly defined switch positions, the 3SU1050-5BL01-0AA0 supports flexible switching of circuits or operational modes, such as Off/On/Reset or Auto/Manual/Override, according to control system requirements. The latching action maintains the chosen setting until unlocked by key rotation, minimizing the risk of accidental operation.

Mechanical durability is a key benefit, with a tested lifespan of 300,000 cycles, attesting to its suitability for frequent actuation. The switch is compliant with industry standards including CE, UL, and CSA, and it meets rigorous environmental protection ratings of IP66, IP67, IP69, IP69K, and IP20. This makes it ideal for applications requiring resistance to dust, water jets, and wash-down, such as in electrical panels, isolator circuits, fire alarm control boards, and power distribution systems.

The product supports a 45° angle of throw for each position, providing tactile feedback and precise switching. Its lightweight yet durable construction ensures ease of installation and long-term reliability. With its extended mechanical life and low carbon manufacturing profile, this switch contributes positively to sustainable automation projects.

Typical application environments include industrial manufacturing plants, process automation, utility switch rooms, commercial electrical distribution, and anywhere control panel switching with key access is required. The Siemens SIRIUS ACT key switch integrates seamlessly into both new and retrofit panels.

Explore the full Siemens Key Switch Head range for enhanced safety, access control, and operational flexibility within the Electronics & Electricals - Switches & Sockets category on EnvMart.