The **PB-NJM5N-R** is a specific part number typically associated with professional audio connectors, manufactured by **Switchcraft**. Specifically, it refers to a **1/4" (6.35mm) Phone Jack** used in PCB (Printed Circuit Board) mounting applications. Below is a detailed breakdown of its electronic and mechanical specifications. --- ## Technical Specifications | Feature | Specification | | :--- | :--- | | **Connector Type** | 1/4" Phone Jack (TRS / Stereo) | | **Mounting Type** | Right Angle PCB Mount | | **Circuit Type** | 3-Conductor (Tip, Ring, Sleeve) | | **Internal Switches** | Non-switching (N) | | **Bushings** | Non-threaded (Plastic) | | **Termination** | Solder Pins | | **Orientation** | Right Angle (Horizontal) | --- ## Component Breakdown ### 1. Electrical Characteristics * **Contact Resistance:** Typically low (under 50 milliohms) to ensure high-fidelity audio signal transfer. * **Insulation Resistance:** Usually rated at 100M $\Omega$ minimum at 500V DC to prevent crosstalk. * **Dielectric Withstanding Voltage:** 500V AC minimum. ### 2. Mechanical Design * **Right Angle Configuration:** Designed to be mounted on a PCB so that the jack opening is flush with the side of an enclosure (common in guitar pedals, amplifiers, and audio interfaces). * **Plastic Housing:** The "P" in the prefix often denotes a plastic body, which provides isolation from the chassis to prevent ground loops. * **Solder Pins:** These are rigid pins designed to be inserted into through-holes on a PCB for a secure mechanical and electrical connection. ### 3. Part Number Suffix Decoding (`-R`) In the Switchcraft nomenclature, the **-R** suffix usually indicates **RoHS Compliance**, meaning the part is manufactured without hazardous materials like lead, making it suitable for modern environmental standards. --- ## Common Applications * **Audio Interfaces:** Input/Output ports for sound cards. * **Musical Instruments:** Internal jacks for keyboards and synthesizers. * **Amplifiers:** Secondary inputs or headphone outputs on the rear or front panels. * **Pro Audio Gear:** Mixing consoles and signal processors. ---