The M3SSK1-301 selector switch is a 3-position, maintained, key-operated switch in black with a non-illuminated chrome metal finish and no contact block. This selector switch is part of ABB's modular plastic range, known for its versatility, high flexibility, and market-leading electrical ratings. Engineered for total reliability, it offers a longer lifetime and high mechanical durability. Self-cleaning contacts ensure reliable operation without the need for maintenance, increasing uptime. A high degree of protection guarantees reliability in extreme environments. The innovative design simplifies the entire process, from selection to easy and quick, tool-free installation, making it the perfect solution for every application.