The **F2VS-5WF-R** is a specific model of a **High-Voltage Reed Relay**, typically manufactured by companies like **OKI (now Standex Electronics)** or similar specialized relay producers. These components are designed for high-reliability switching in demanding electrical environments. --- ## 1. Technical Specifications The "F2VS" series is generally characterized by its vacuum-sealed construction, which allows it to handle high voltages while maintaining a small physical footprint. | Feature | Description | | :--- | :--- | | **Relay Type** | High Voltage Reed Relay | | **Contact Form** | 1 Form A (Normally Open / SPST) | | **Max Switching Voltage** | Typically up to 5,000V DC (5kV) | | **Coil Voltage** | 5V DC (indicated by the "-5" in the part number) | | **Mounting Type** | Through-hole (PCB Mount) | | **Lead Configuration** | Lead-formed for specific orientation (R-type) | --- ## 2. Key Electronic Components & Construction The F2VS-5WF-R consists of several critical internal elements that define its performance: ### A. The Reed Switch The heart of the device is a hermetically sealed glass tube containing two ferromagnetic blades (reeds). * **Vacuum Seal:** To prevent arcing at high voltages, the glass envelope is either evacuated (vacuum) or filled with an inert gas. * **Contact Material:** Usually plated with Rhodium or Tungsten to resist wear from high-voltage discharge. ### B. The Electromagnetic Coil Wrapped around the glass reed switch is a copper wire coil. * **Activation:** When 5V DC is applied to the coil, it creates a magnetic field. * **Operation:** This field magnetizes the reeds, causing them to pull together and close the circuit. ### C. Insulation & Encapsulation Because the device switches up to 5kV, the external housing is made of high-dielectric epoxy or plastic. This prevents "creepage" (current traveling across the surface) and "clearance" (current jumping through the air) between the low-voltage coil pins and the high-voltage switch pins. --- ## 3. Pinout and Functionality The part number suffix **"WF-R"** often refers to the specific lead-frame configuration: * **W:** Wide lead spacing (essential for high-voltage isolation). * **F:** Flat or specific lead shape. * **R:** Lead orientation or RoHS compliance (depending on the manufacturer's datasheet). --- ## 4. Common Applications Due to its ability to isolate high voltages with a low-voltage control signal, it is used in: 1. **Automated Test Equipment (ATE):** Testing insulation resistance (Hi-Pot testing). 2. **Medical Equipment:** Defibrillators or laser power supplies. 3. **Battery Management Systems (BMS):** Monitoring high-voltage strings in electric vehicles. 4. **Communication:** High-frequency antenna switching. ---