The **FJFT4-U3A-R** is a specific electronic component, typically categorized as a **USB 3.0 (Type-A) Connector**. It is commonly used in high-speed data transmission applications and embedded systems. Below is a detailed breakdown of its specifications, mechanical features, and electrical characteristics. --- ### 1. General Specifications The "U3A" in the part number signifies its compliance with **USB 3.0 (SuperSpeed)** standards, offering significantly higher bandwidth than previous USB 2.0 versions. | Feature | Specification | | :--- | :--- | | **Connector Type** | USB 3.0 Type-A Female | | **Orientation** | Right-Angle (Horizontal) | | **Mounting Type** | Through-Hole (THT) or Hybrid (SMT + THT Shell) | | **Standard Bandwidth** | Up to 5 Gbps | | **Number of Pins** | 9 Pins (4 for USB 2.0 backward compatibility + 5 for SuperSpeed) | --- ### 2. Electrical Characteristics Because this is a USB 3.0 part, it features additional pins to support differential signaling pairs for high-speed data. * **Voltage Rating:** 30V AC (RMS) * **Current Rating:** 1.8A for Power pins (VBUS/GND), 0.25A for Signal pins. * **Contact Resistance:** $\leq$ 30 m$\Omega$. * **Insulation Resistance:** $\geq$ 1000 M$\Omega$. * **Dielectric Withstanding Voltage:** 100V AC for 1 minute. --- ### 3. Pin Configuration (Pinout) The FJFT4-U3A-R utilizes a dual-row pin configuration to accommodate the 9-pin architecture of USB 3.0. | Pin Number | Signal Name | Description | | :--- | :--- | :--- | | 1 | **VBUS** | +5V Power | | 2 | **D-** | USB 2.0 Differential Pair (Negative) | | 3 | **D+** | USB 2.0 Differential Pair (Positive) | | 4 | **GND** | Ground for Power | | 5 | **StdA_SSRX-** | SuperSpeed Receive (Negative) | | 6 | **StdA_SSRX+** | SuperSpeed Receive (Positive) | | 7 | **GND_DRAIN** | Ground for Signal Return | | 8 | **StdA_SSTX-** | SuperSpeed Transmit (Negative) | | 9 | **StdA_SSTX+** | SuperSpeed Transmit (Positive) | --- ### 4. Mechanical & Material Features * **Shell:** Usually made of Stainless Steel or Copper Alloy with Nickel plating for EMI shielding and durability. * **Contacts:** Phosphor Bronze with Gold plating (typically 1u" to 30u") on the contact area to prevent oxidation. * **Durability:** Rated for approximately 5,000 mating cycles. * **Housing:** High-temperature thermoplastic (UL94V-0 rated), suitable for reflow soldering processes. --- ### 5. Common Applications * **Computing:** Motherboards, Laptops, and Docking Stations. * **Consumer Electronics:** Smart TVs, Gaming Consoles, and Set-top boxes. * **Industrial:** High-speed data logging and industrial PC interfaces.