The **MH31FDD-R** is a specific electronic component typically identified as a **Micro-USB Connector**. It is widely used in consumer electronics for charging and data transfer applications. Below is a detailed breakdown of its technical specifications and physical attributes. --- ### 1. General Specifications The MH31FDD-R is designed for high-durability surface mount applications. | Feature | Description | | :--- | :--- | | **Component Type** | Micro USB Type B (Female) | | **Mounting Type** | SMT (Surface Mount Technology) / DIP hybrid | | **Orientation** | Right Angle / Horizontal | | **Number of Pins** | 5 Pins (VCC, D-, D+, ID, GND) | | **Body Material** | High-temperature Thermoplastic | ### 2. Electrical Characteristics These parameters define the safety and performance limits of the connector during operation. * **Current Rating:** Typically 1.0A to 1.8A per contact (depending on specific manufacturer batch). * **Voltage Rating:** 30V AC/DC. * **Contact Resistance:** $\leq$ 30 m$\Omega$. * **Insulation Resistance:** $\geq$ 100 M$\Omega$ at 500V DC. * **Dielectric Withstanding Voltage:** 100V AC for 1 minute. ### 3. Mechanical and Physical Design The "FDD" and "R" suffixes in the part number often refer to the specific mechanical footprint and packaging (Reel). * **Shielding:** Metal shell (usually Stainless Steel or Copper Alloy) for EMI/RFI protection. * **Durability:** Rated for approximately 10,000 mating cycles. * **Shell Legs:** Usually features 2 or 4 "DIP" legs that go through the PCB to provide mechanical strength against cable pulling, while the signal pins are surface-mounted. * **Tape and Reel:** The "-R" suffix indicates it is supplied in **Tape and Reel** packaging, intended for automated Pick-and-Place assembly lines. ### 4. Pinout Configuration | Pin Number | Signal Name | Function | | :--- | :--- | :--- | | 1 | VBUS | +5V Power | | 2 | D- | Data Minus | | 3 | D+ | Data Plus | | 4 | ID | OTG Identification | | 5 | GND | Ground | --- ### 5. Common Applications * **Mobile Devices:** Smartphones and Tablet charging ports. * **Peripherals:** Power banks, Bluetooth speakers, and wireless headphones. * **Development Boards:** Used on older versions of Arduino or ESP32 boards for programming and power.