CCR-33S / CR-33S RF Microwave Coaxial Switches Teledyne Relays CCR-33S / CR-33S RF and Microwave Coaxial Switches are failsafe, latching, and multi-throw coaxial switches. CCR-33 series switches operate from DC-18GHz. CR-33S series switches operate from DC-22GHz and offer an expanded temperature range. All models available with indicator contacts, TTL drives, and more.