## CCR-33K60-R: Technical Overview The **CCR-33K60-R** is a high-performance **Electromechanical Coaxial Switch** manufactured by Teledyne Relays. It is specifically designed for radio frequency (RF) applications where low insertion loss and high isolation are critical. --- ### 1. General Specifications The "CCR-33" series typically represents a DPDT (Double Pole Double Throw) or Transfer switch configuration. | Feature | Specification | | :--- | :--- | | **Switch Type** | Transfer (DPDT) | | **Frequency Range** | DC to 18 GHz | | **Impedance** | 50 Ohms | | **Actuation Type** | Latching | | **Voltage (Nominal)** | 28 Vdc | | **Connector Type** | SMA (Female) | --- ### 2. Key Electronic Components & Mechanics The internal operation of the CCR-33K60-R involves a blend of precision mechanical parts and electronic control circuits: #### A. The Actuator (Latching Mechanism) Unlike "failsafe" switches that return to a default state when power is removed, this unit is **latching**. * **Dual Coils:** It uses two internal coils to move the RF contacts. * **Power Efficiency:** Power is only required for a few milliseconds to "flip" the switch position. Once toggled, it remains in that state without consuming power. #### B. Contact System * **Gold-Plated Contacts:** To ensure low resistance and prevent oxidation over millions of cycles. * **Wiping Action:** The mechanical design includes a wiping motion to clear debris and maintain signal integrity. #### C. Control Circuitry The "R" suffix often indicates specific circuit options, such as **Solder Terminals** or integrated **Suppression Diodes**. * **Transient Suppression:** Internal diodes are often included to protect the driving electronics from "back EMF" (voltage spikes) when the coils are de-energized. * **Indicators (Optional):** Some variants include auxiliary contacts to provide electronic feedback on the switch's physical position. --- ### 3. RF Performance Characteristics At its maximum frequency (18 GHz), the electronic path is engineered for minimal signal degradation: | Parameter | Performance (at 18 GHz) | | :--- | :--- | | **Insertion Loss** | 0.50 dB (Max) | | **Isolation** | 60 dB (Min) | | **VSWR** | 1.50:1 (Max) | --- ### 4. Typical Applications * **Signal Routing:** Switching between two different RF paths in a test bench. * **Redundancy:** Switching to a backup transmitter/antenna if the primary fails. * **Automated Test Equipment (ATE):** High-speed RF testing where durability is required (typically rated for 5 million cycles).