The **CCT-58S140-R** is a high-performance, broadband coaxial switch manufactured by Teledyne Coax Switches (a business unit of Teledyne Relays). This specific model belongs to the **CCT-58 Series**, which consists of commercial, multi-throw (SP4T) electromechanical switches designed for high-frequency RF applications. --- ### 1. Technical Specifications Overview The "CCT-58S140-R" part number identifies specific electrical and mechanical characteristics. | Parameter | Specification | | :--- | :--- | | **Switch Type** | SP4T (Single Pole, Four Throw) | | **Frequency Range** | DC to 18 GHz | | **Coil Voltage** | 12 Vdc to 15 Vdc (Nominal 12V) | | **Actuator Type** | Latching (Maintains position without continuous power) | | **Actuator Reset** | Standard Self-Cutoff / Diodes included | | **RF Connector** | SMA (Female) | | **Indicator** | Includes Indicator Contacts (for status feedback) | --- ### 2. Breakdown of the Part Number To understand the electronic capabilities, we can decode the nomenclature: * **CCT**: Teledyne Series prefix for high-frequency SPnT switches. * **58**: Specifies the SP4T (4-position) configuration. * **S**: Indicates SMA Connectors. * **1**: Actuator Voltage (12V–15V range). * **4**: Actuator Type (Latching with Indicator contacts and Suppression Diodes). * **0**: No TTL Driver (Standard pulse operation). * **R**: RoHS Compliant. --- ### 3. Key Electronic Features #### A. Latching Actuator Unlike a "failsafe" switch that requires constant power to stay in a specific position, a **latching** switch uses a pulse of electricity to move the contact. Once moved, it remains in that position mechanically. This is ideal for low-power applications or systems where heat generation must be minimized. #### B. Suppression Diodes The unit includes internal diodes to protect the driving circuitry from "back-EMF" or inductive spikes that occur when the switch coil is de-energized. #### C. Indicator Contacts This model features independent indicator circuits. These act as internal auxiliary switches that provide a logic signal back to the controller, confirming whether the RF path is physically closed or open. #### D. Performance Metrics (at 18 GHz) * **Insertion Loss:** Typically < 0.5 dB. * **Isolation:** > 60 dB (prevents signal leakage between ports). * **VSWR:** < 1.50:1 (minimizes signal reflection). --- ### 4. Typical Applications * **Automated Test Equipment (ATE):** Switching between multiple instruments or units under test. * **Telecommunications:** Signal routing in base stations. * **Satellite Communications:** High-reliability switching in ground stations. * **RF Matrixing:** Building complex signal routing networks.