C4D0904N-A is a non-shorting rotary selector switch from the C4 Series, featuring 9 poles organized as 3 poles per deck across 3 decks, with 2-4 active positions per deck. The switch is rated for 0.5 amp at 28 VDC and 0.3 amp at 125 VAC, with a current carrying capacity of 15 amps and dielectric strength of 1,000 VAC. It incorporates a dual-ball, hill and valley indexing mechanism with a minimum index life of 25,000 cycles, brass terminals with silver plate, and diallyl phthalate insulation for reliable operation in harsh environments. The fully enclosed design with IP67 rating available keeps dirt and moisture out while maintaining lifetime lubricants, making it suitable for industrial control panels, telecommunications equipment, and test instrumentation where multiple circuit switching is required.