221 Rotary DIP Switches Tusonix/CTS Electronic Components 221 Rotary DIP Switches feature a compact size of 10mm x 10mm. These switches are available in surface-mount or through-hole style, in 10-position or 16-position models, and with three rotor or shaft options. The 221 Series offers precise detents and clockwise/counterclockwise rotation. With high-temperature resistance and either binary coded decimal or hexadecimal output, these devices are suitable for a wide range of applications. including servers, circuit breakers, security, and HVAC.