C4D0212S-A is a two-pole rotary selector switch from the C4 Series designed for reliable switching applications in industrial and electronic equipment. The switch features 2 decks with 1 pole per deck, supporting 2 to 12 active positions at 30° indexing with fixed stops set at 2 positions. It is rated for 0.5 amp @ 28 VDC make-and-break resistive load, with a current carrying capacity of 15 amps and dielectric strength of 1,000 VAC. The switch employs a fully enclosed design with dual-ball, hill and valley indexing mechanism, achieving a minimum index life of 25,000 cycles and stop strength of 15 in. lbs. Contact resistance averages 3 milliohms initially, and insulation resistance exceeds 10,000 megohms. Terminals and contacts are brass with silver plate, and the insulation is diallyl phthalate. This switch is ideal for applications requiring precise position selection, such as control panels, test equipment, and instrumentation systems where durability and reliable detenting are essential.