The 09MS30-04-4-03N is a Series 09 multi-deck rotary switch featuring a 30° angle of throw with military-style construction and PC mount termination. This switch is configured with 4 poles per deck, 4 positions per pole, and 3 decks in a non-shorting contact arrangement, providing reliable switching for complex circuit applications. The switch incorporates a gold-plated contact system and features a 0.5" diameter with a 1/4 amp rating, meeting MIL-S-3786/13 military qualification standards. The device includes an integral assembly nut with 1/4-32 UNEF-2A thread and is designed for applications requiring multi-position, multi-deck switching with precise electrical isolation between positions. Its compact PC mount design and proven quality make it suitable for military, aerospace, and industrial control systems where reliability and performance are critical.