The M30C-FWRS-MS3-A1 is a key-operated selector switch designed for industrial control applications, featuring a smooth front face with a 30.5 mm mounting hole and a metal collar for enhanced durability. This device operates in 2 positions with a 60° rotation angle and includes an MS3 lock mechanism with key withdrawal capability set to position 0. The switch offers IP66 protection rating, operates across a temperature range of -25°C to +70°C, and demonstrates mechanical longevity exceeding 0.1 × 106 cycles with a maximum command frequency of 100 operations per hour and command torque of 0.5 Nm. It complies with IEC/EN 60947 and IEC/EN 60947-5 standards, includes SmartWire-DT connectivity with SWD-RMQ connectors, and is suitable for marine applications with DNV and GL certifications. The switch is ideal for secure access control and critical switching applications where key-operated functionality and environmental protection are essential.