AUTO-DIP® Switch: 209/210 Tusonix/CTS Electronic Components AUTO-DIP® Switch series 209/210 feature full sealing to withstand insertion shock, wave solder temperatures, and board washing. The optimized contact system is available in low, medium, and extended height actuators and features a redundant, wiping contact and no contactor deflection during actuation. The premium series 209 features gold-plated beryllium copper contacts, while the economical series 210 features gold flash-plated beryllium copper contacts.