The **WJM-1EA-R** is a specific electronic component typically identified as a **Micro-USB Receptacle (Type B)**, commonly used for power charging and data transfer in small electronic devices. It is a surface-mount device (SMD) designed for high durability. --- ### 1. Key Technical Specifications Below are the primary electrical and physical parameters for the WJM-1EA-R: | Feature | Specification | | :--- | :--- | | **Connector Type** | Micro-USB Type B | | **Gender** | Receptacle (Female) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Number of Pins** | 5 Pins | | **Current Rating** | 1.0A - 1.8A per contact | | **Voltage Rating** | 30V AC/DC | | **Housing Material** | High-Temperature Thermoplastic | | **Contact Plating** | Gold (for corrosion resistance) | --- ### 2. Physical Layout and Pinout The component follows the standard USB 2.0 Micro-B pin configuration: 1. **Pin 1 (VCC):** +5V Power. 2. **Pin 2 (D-):** Data Negative. 3. **Pin 3 (D+):** Data Positive. 4. **Pin 4 (ID):** Used for OTG (On-The-Go) identification. 5. **Pin 5 (GND):** Ground. ### 3. Structural Features * **Shielding:** The outer shell is made of stainless steel or copper alloy to provide EMI (Electromagnetic Interference) protection and structural grounding. * **Mechanical Integrity:** The "R" in the part number often denotes specific packaging (like Tape & Reel) or a reinforced design with "legs" that solder into the PCB for extra mechanical strength against plugging/unplugging forces. * **Durability:** Rated for approximately 10,000 mating cycles. --- ### 4. Common Applications Due to its small footprint, the WJM-1EA-R is found in: * **Mobile Accessories:** Power banks, Bluetooth speakers, and headphones. * **Development Boards:** Older versions of Raspberry Pi or Arduino-compatible boards. * **Handheld Devices:** GPS units, digital cameras, and e-readers.