L21KE03 is a non-illuminated selector switch featuring a 22 mm diameter housing with a black handle, designed for 2-position maintained operation at 90° rotation. The switch provides normally open (NO) contact configuration with positive opening capability, meeting IEC/EN 60947-5-1 standards. It supports rated insulation voltage of 690 V AC (IEC/EN 60947-1) and 600 V AC (UL 508), with conventional thermal current ratings of 10 A AC15 and 2.5 A DC13. The switch is rated for 1 million electrical operating cycles and operates reliably across a temperature range of -25°C to +70°C, with storage capability from -40°C to +70°C. This selector switch is commonly used in industrial control panels, machinery automation, and process control applications where reliable manual position selection is required.