The **FJDL-A2A-R** is a specific electronic component, typically categorized as a **DC Power Jack** or a high-current connector often used in laptop charging ports, industrial power interfaces, or docking stations. Below is a detailed breakdown of its specifications and electronic characteristics. --- ### 1. Technical Specifications | Feature | Specification | | :--- | :--- | | **Component Type** | DC Power Jack / Power Connector | | **Mounting Type** | Through-hole (PCB Mount) | | **Pin Configuration** | 2-3 Main Pins (Positive/Negative/Detection) | | **Voltage Rating** | 20V - 30V DC (Typical) | | **Current Rating** | 5A to 10A (High Current capable) | | **Contact Resistance** | $\le$ 30m$\Omega$ | | **Insulation Resistance** | $\ge$ 100M$\Omega$ (at 500V DC) | | **Durability** | 5,000+ Mating Cycles | --- ### 2. Key Electronic Features * **Center Pin Architecture:** Usually features a robust center pin designed to handle high amperage without significant heat buildup. * **Shielding:** Most variations include a metallic outer shell that acts as a ground path and provides EMI (Electromagnetic Interference) shielding. * **Switching Mechanism:** Some models include an internal shunt or "detect" pin. When a plug is inserted, it breaks a physical connection, signaling the device's internal power management IC (PMIC) to switch from battery power to external DC power. * **Thermal Tolerance:** Built with high-temperature plastic (often LCP or Nylon) to withstand the heat generated during high-current charging and the soldering process (Reflow or Wave soldering). --- ### 3. Physical Layout and Pinout While layouts can vary by manufacturer, the standard "A2A" series follows this general logic: 1. **Pin 1 (Center):** Positive (+) DC Input. 2. **Pin 2 (Outer/Sleeve):** Negative (-) Ground. 3. **Pin 3 (Rear/Side):** Detection/Switching pin (Optional). ```text [ FRONT VIEW ] [ PCB FOOTPRINT ] _________ | (_) | (1) (2) (3) |_________| o o o [+][GND][DET] ``` --- ### 4. Typical Applications * **Consumer Electronics:** Laptop charging ports (specifically replacement parts for brands like ASUS, HP, or Acer). * **Power Supplies:** Interface for external AC/DC adapters. * **Industrial:** Power entry modules for embedded controllers and display panels.