The **UT7401G-AE3-R** is a high-performance, P-Channel enhancement mode Field Effect Transistor (MOSFET) manufactured by Unisonic Technologies (UTC). It is primarily designed for power management and switching applications in compact electronic devices. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics for the UT7401G: | Parameter | Specification | Unit | | :--- | :--- | :--- | | **Channel Type** | P-Channel | - | | **Drain-Source Voltage ($V_{DS}$)** | -30 | Volts | | **Gate-Source Voltage ($V_{GS}$)** | ±12 | Volts | | **Continuous Drain Current ($I_D$)** | -4.2 | Amperes | | **On-State Resistance ($R_{DS(ON)}$)** | 50 (max) @ $V_{GS}$=-10V | mΩ | | **Package Type** | SOT-23 | - | | **Operating Temperature** | -55 to +150 | °C | --- ### 2. Physical and Pin Configuration The **AE3** suffix indicates a standard **SOT-23** package, which is a surface-mount package with three terminals. 1. **Gate (G):** Controls the switching state of the MOSFET. 2. **Source (S):** Connected to the input voltage (usually positive in P-Channel configurations). 3. **Drain (D):** Connected to the load. --- ### 3. Core Features * **Low On-Resistance:** Minimizes power dissipation during operation, increasing efficiency. * **Low Threshold Voltage:** Can be driven by low-voltage logic signals, making it suitable for battery-operated devices. * **Fast Switching Speed:** High-frequency performance for DC-DC converters. * **Halogen-Free:** The "G" in the part number usually signifies a "Green" or Halogen-free component. --- ### 4. Common Applications Due to its small footprint and current handling capabilities, it is frequently used in: * **Load Switching:** Turning peripheral devices on/off in mobile electronics. * **Power Management:** In laptops, cellular phones, and digital cameras. * **Battery Protection:** Circuits designed to prevent over-discharge or reverse polarity. * **DC-DC Converters:** Small-scale voltage regulation. --- ### 5. Part Number Decoding The suffix provides specific manufacturing details: * **UT7401:** The base part number/series. * **G:** Halogen-free and RoHS compliant. * **AE3:** Standard SOT-23 package. * **R:** Tape and Reel packaging (used for automated assembly).