C7D0212N-30C is a fully enclosed, modular rotary selector switch from the C7 Series designed for reliable multi-position switching applications. This non-shorting variant features 30° indexing with 2 poles and 12 active positions per deck, utilizing a single-ball hill and valley indexing mechanism with fixed stops. The switch is rated for 1.0 amp at 28 VDC and 0.5 amp at 125 VAC, with a current carrying capacity of 25 amps and dielectric strength of 1,000 VAC. Key mechanical specifications include an index life of 25,000 cycles minimum, stop strength of 2.82 Nm minimum, contact resistance of 3 milliohms average initial, and insulation resistance exceeding 10,000 megohms. The switch features brass terminals with silver plate, diallyl phthalate insulation, and a 51.6 mm diameter body with solder lug terminals, making it suitable for industrial control panels, telecommunications equipment, and precision instrumentation requiring reliable position selection.