The 30-15203B is a non-shorting rotary switch featuring an enclosed contact design. It is configured with 2 poles and 3 positions and has a current rating of 0.3A at 125V AC. Key electrical characteristics include a maximum initial contact resistance of 20 MΩ, a minimum insulation resistance of 100 MΩ at 500V DC, and a withstand voltage of 500V AC for one minute. The switch is built with a 38mm long shaft, solder-type terminals, and is designed for a 0.375-inch mounting hole. Its specifications make it a reliable choice for signal routing and circuit selection in various electronic applications.