Parameter Specification Product Series M3S Series (Modular Control & Signalling Devices) Device Type Maintained-Contact Pushbutton Selector Switch (Momentary action with mechanical latching) Contact Configuration 1 Changeover Contact (SPDT / Form C) - 1 NO + 1 NC Contact Rating (Resistive Load) Typically: 4 A @ 250 V AC / 2 A @ 250 V DC Minimum Load: 10 mA / 5 V DC Electrical Life ≥ 1 x 10⁶ operations (at rated load) Mechanical Life ≥ 5 x 10⁶ operations Rated Insulation Voltage (Ui) 250 V Degree of Protection Front: IP40 (when mounted) Terminals: IP20 Mounting Snap-on mounting into a standard 22.5mm x 22.5mm mounting hole on a panel (typically 1.5mm thick). Requires a separate mounting frame/surround (e.g., ABB M3S frame). Actuator Type Square, flush or slightly raised pushbutton. The "10B" code often specifies the exact style and color (e.g., black, red, blue, etc.). "B" commonly denotes a specific actuator variant. Terminal Connection Screw clamp terminals Connection Capacity Up to 1.5 mm² (stranded wire with ferrule recommended) Ambient Temperature Operation: -25°C to +70°C Storage: -40°C to +85°C Standards Compliance IEC/EN 60947-5-1, UL 508, CSA C22.2 No. 14