The **CCRT-33S6E-R** is a specialized RF (Radio Frequency) coaxial switch manufactured by **Teledyne Relays**. It belongs to the **CRT-33 Series**, which consists of elite, failsafe, multi-throw coaxial switches designed for high-performance signal routing. --- ### 1. Key Technical Specifications The following table highlights the primary electrical and physical characteristics of the device: | Feature | Specification | | :--- | :--- | | **Switch Type** | SP6T (Single Pole, Six Throw) | | **Frequency Range** | DC to 18 GHz | | **Actuator Type** | Failsafe | | **Voltage (Nominal)** | 28 VDC | | **Impedance** | 50 Ohms | | **Connector Type** | SMA (Female) | | **Actuation Current** | ~140 mA per channel at 28V | --- ### 2. Breakdown of the Part Number The alphanumeric code provides specific details about the component's configuration: * **C**: Commercial Grade (Standard environmental testing). * **CRT-33**: Series designation (Coaxial, Multi-throw, DC-18GHz). * **S**: SMA Connectors. * **6**: 6-Position (SP6T). * **E**: Internal Solder Terminals (for electrical connection). * **R**: Positive Common (Common Anode) polarity for the indicator/coil. --- ### 3. Electronic Performance Characteristics #### RF Performance This switch is designed for minimal signal degradation. As frequency increases, performance typically follows this trend: * **Insertion Loss:** Very low (typically < 0.2 dB at 3 GHz; < 0.5 dB at 18 GHz). * **Isolation:** High isolation between ports (typically > 80 dB at lower frequencies; > 60 dB at 18 GHz) to prevent crosstalk. * **VSWR (Voltage Standing Wave Ratio):** Usually kept below 1.5:1 to ensure maximum power transfer. #### Actuation Mechanism The **Failsafe** operation means that when DC power is removed, the switch reverts to a pre-defined "off" or default state. It requires continuous current to maintain an active path to one of the six output ports. #### Indicator Circuitry The "E" and "R" designations often imply the inclusion of indicator contacts. These are secondary electronic circuits that allow a microcontroller or monitoring system to verify which RF path is physically closed without probing the RF line itself. --- ### 4. Common Applications * **Automated Test Equipment (ATE):** Routing multiple signals to a single measuring instrument (like a Spectrum Analyzer). * **Satellite Communications:** Redundancy switching and signal distribution. * **Telecommunications Infrastructure:** High-frequency signal switching in base stations.