The **JR-54-R** typically refers to a specific series of **DC Power Jacks (Barrel Connectors)**, commonly manufactured by electronic component suppliers like *Zhenqi* or *Lumberg-style* equivalents. These are fundamental components used to deliver low-voltage DC power to consumer electronics. --- ### 1. Technical Specifications The "R" usually denotes a **Right Angle** orientation or a **Rear-mount** configuration depending on the specific manufacturer's datasheet. Below are the standard electronic characteristics: | Parameter | Typical Value | | :--- | :--- | | **Rated Voltage** | 12V to 30V DC | | **Rated Current** | 0.5A to 5.0A (varies by pin size) | | **Contact Resistance** | ≤ 30mΩ | | **Insulation Resistance** | ≥ 100MΩ (at 500V DC) | | **Dielectric Strength** | 500V AC for 1 minute | | **Life Cycle** | 5,000+ insertions | --- ### 2. Physical Construction The JR-54-R is comprised of three primary physical layers: 1. **Housing:** Usually made of **PBT (Polybutylene Terephthalate)** or High-temp Nylon, which provides heat resistance during soldering. 2. **Center Pin:** A conductive metal rod (sizes commonly include 1.3mm, 2.1mm, or 2.5mm). 3. **Shunt/Switch Terminal:** Many versions include a "normally closed" switch contact. When the plug is inserted, it breaks the connection between internal battery power and the device, switching it to external DC power. --- ### 3. Pinout and Mounting This component is designed for **Through-Hole Technology (THT)** mounting on a Printed Circuit Board (PCB). * **Pin 1:** Center Pin (Positive/VCC) * **Pin 2:** Outer Sleeve (Ground/GND) * **Pin 3:** Shunt/Switch (used for battery bypass circuits) #### Wiring Diagram Example ```text [ Jack Face ] / \ (Pin 2) (Pin 1) <-- Center Pin | | (Pin 3) ----/ <-- Shunt Switch ``` --- ### 4. Applications Because of its small footprint and reliable power delivery, the JR-54-R series is found in: * **Networking Gear:** Routers, Modems, and Switches. * **Consumer Tech:** Digital photo frames, LED strips, and small speakers. * **DIY Projects:** Arduino or Raspberry Pi power input modules. ---