The **CCRT-53SX0-RMS** is a high-performance, electromechanical coaxial switch manufactured by Teledyne Relays. It is specifically designed for RF (Radio Frequency) applications where signal integrity, power handling, and reliability are critical. --- ### 1. General Specifications The device belongs to the **CCR-53S** series, which signifies a SPDT (Single Pole Double Throw) configuration with specific fail-safe or latching characteristics. | Feature | Description | | :--- | :--- | | **Switch Type** | SPDT (Single Pole Double Throw) | | **Frequency Range** | DC to 26.5 GHz | | **Connector Type** | SMA (Female) | | **Actuation** | Latching / Failsafe (Depending on sub-model) | | **Impedance** | 50 Ohms | --- ### 2. Electronic Component Breakdown #### A. Actuation Mechanism The "RMS" suffix often indicates specific electrical interface features, such as internal termination or specialized drive circuits. * **Solenoid Drive:** The internal switching is performed by a solenoid that moves the RF contacts. * **Operating Voltage:** Typically operates on **12V or 28V DC**, though the "S" in the part number often denotes specific voltage compatibility. #### B. RF Path Components * **Contact Material:** Gold-plated contacts are used to minimize insertion loss and prevent oxidation. * **Internal Terminations:** Some models in this series include internal resistors to terminate the unused port into 50 Ohms, preventing signal reflections. #### C. Command & Control Logic The electronic control interface usually includes: 1. **Suppression Diodes:** To prevent Back-EMF (Electro-Motive Force) from damaging the driving circuitry when the coil is de-energized. 2. **Indicator Circuitry (Optional):** Many RMS models include auxiliary contacts that allow the system to electronically verify the physical position of the switch. --- ### 3. Performance Metrics | Parameter | Performance Level | | :--- | :--- | | **Insertion Loss** | < 0.2 dB (at low frequencies) to 0.7 dB (at 26.5 GHz) | | **Isolation** | > 60 dB to 80 dB (ensures minimal signal leakage) | | **VSWR** | < 1.1:1 to 1.7:1 (Voltage Standing Wave Ratio) | | **Switching Time** | ~15 ms | --- ### 4. Application Context Because of its high-frequency capability (26.5 GHz), this part is commonly used in: * **Automated Test Equipment (ATE):** Routing signals between a signal generator and multiple Units Under Test (UUT). * **Satellite Communications:** Switching between primary and redundant transmission paths. * **Radar Systems:** Signal processing and RF front-end switching.