The ABB M3SSK1-301 Selector Switch is a 3-position, maintained, key-operated, non-illuminated switch with a chrome metal bezel. Part of ABB's versatile modular plastic range, it offers high flexibility and market-leading electrical ratings. Engineered for reliability, longevity, and mechanical durability, its self-cleaning contacts ensure maintenance-free operation and increased uptime. The high degree of protection guarantees performance in extreme environments. Its innovative design simplifies selection and enables quick, tool-free installation, making it an ideal solution for any application..This is a 3-position, maintained, key-operated, non-illuminated selector switch with a chrome metal bezel and no contact blocks. It features a 22.5 mm switch size and quick-release contact blocks. The switch has a rated insulation voltage of 600V and a mechanical life of 10 million operations for the contact block. Terminals accommodate #14-20 AWG wire. The mounting hole size is 0.874 (2.25 cm). Operating temperature ranges from -13° to 122°F (-25° to 50°C). Panel thickness compatibility is from 0.059 to 0.236 (0.15 to 0.6 cm). It has a protection rating of NEMA type 1, 3R, 4, 4X, 12, 13 and approvals from UL File #E76003 and CSA File #LR19700. The warranty is 1 year.Mounting Hole Size: 0.874 (2.25 cm) | Panel Thickness: 0.059 to 0.236 (0.15 to 0.6 cm) | Switch Size: 22.5 mm