The 50SP90-01-1-04N is a single-deck rotary switch manufactured by Grayhill, designed for applications requiring reliable contact switching with a compact form factor. This switch features a 0.5" diameter with a 90° angle of throw, 1 pole, 4 positions per pole, and non-shorting contacts, rated for 200 mA operation. The switch is mounted 0.698" behind the panel and offers PC or solder lug termination options with positive shaft grounding for EMI/RFI shielding. Optional complete seal is available for PC board assembly and cleaning, making it suitable for industrial control panels, instrumentation, and applications requiring durable, compact switching solutions.