The 51DP30-01-2-AJN is a Series 51 single-deck rotary switch manufactured by Grayhill, designed for applications requiring reliable position selection and switching. This switch features a compact 0.5" diameter with a 30° angle of throw, 2 poles per deck, and PC mount termination, rated for 200mA continuous current. The switch incorporates positive shaft grounding for EMI/RFI shielding and offers optional complete seal for PC board assembly and cleaning. With its small form factor, .698" behind-panel depth, and choice of non-shorting or shorting contacts, the 51DP30-01-2-AJN is well-suited for instrumentation, control panels, and industrial equipment where space is limited and reliable multi-position switching is required.