The 77SP36-01-2-03N is a single-deck rotary switch manufactured by Grayhill, designed for compact, behind-panel mounting in space-constrained applications. This switch features a 0.5" diameter with a 36° angle of throw, 200 mA rated current capacity, and 0.18" behind-panel depth, utilizing non-shorting wiping contacts for reliable operation. It operates across a temperature range of -40°C to +85°C with a rotational torque of 3 to 7 in-oz and includes shaft and panel sealing for environmental protection, including water immersion capability up to 33 feet for 30 minutes with shaft operation. The switch is commonly used in handheld radios, medical devices, night vision products, and laser aiming devices where reliability, compact size, and sealed operation are essential.