The **213-R** (often associated with the prefix **S-213-R** or specific series by manufacturers like *Pomona Electronics* or *TE Connectivity*) typically refers to specialized high-quality connectors or hardware components used in RF (Radio Frequency) and testing environments. Below is a breakdown of the technical aspects of these electronic parts, specifically focusing on the most common industry standard: the **N-Type Female Bulkhead Connector**. --- ## 1. Technical Specifications The "213-R" series components are generally designed for high-performance signal transmission. | Feature | Specification (Typical) | | :--- | :--- | | **Connector Type** | N-Type (Female) | | **Impedance** | 50 Ohms | | **Body Material** | Brass (Nickel or Silver plated) | | **Insulator** | PTFE (Teflon) | | **Contact Pin** | Phosphor Bronze or Beryllium Copper (Gold Plated) | | **Operating Frequency** | DC to 11 GHz (varies by sub-model) | --- ## 2. Key Components of the Part The 213-R assembly consists of several electronic sub-parts: 1. **The Shell (Body):** Made of durable metal to provide RF shielding and grounding. The "R" often signifies a "Rear Mount" or "Recessed" configuration for bulkhead mounting. 2. **Internal Dielectric:** Usually a PTFE (Teflon) cylinder that maintains the distance between the center conductor and the outer shield to ensure constant impedance. 3. **Center Contact:** The "female" socket that accepts the male pin. Gold plating is used here to minimize signal loss and prevent oxidation. 4. **Hardware Kit:** Includes a lock washer and a hex nut to secure the part to a chassis or panel. --- ## 3. Common Applications These parts are critical in environments where signal integrity is paramount: * **Telecommunications:** Base stations and antenna systems. * **Testing Equipment:** Oscilloscopes and Signal Generators that require 50-ohm terminations. * **Aerospace:** High-vibration environments requiring secure threaded connections. * **Cabling:** Often paired with **RG-213** coaxial cables (hence the naming convention) for high-power RF transmission. --- ## 4. Installation Example When integrating a 213-R part into a circuit, it is often mounted through a panel. Here is a conceptual representation of how it is addressed in a bill of materials (BOM): ```json { "PartNumber": "213-R", "Category": "Connectors/Interconnects", "SubCategory": "Coaxial Connectors (RF)", "MountingType": "Panel Mount, Bulkhead - Front Nut", "FasteningType": "Threaded (N-Type)" } ```