## UT6401G-AG6-R: Technical Overview The **UT6401G-AG6-R** is a P-Channel enhancement mode Field Effect Transistor (MOSFET) designed by Unisonic Technologies (UTC). It is primarily used for power management and switching applications in compact electronic devices. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Drain-Source Voltage ($V_{DSS}$)** | -30 V | | **Gate-Source Voltage ($V_{GSS}$)** | ±12 V | | **Continuous Drain Current ($I_D$)** | -4.2 A | | **Drain-Source On-State Resistance ($R_{DS(ON)}$)** | 50 mΩ @ $V_{GS}$ = -10V | | **Package Type** | SOT-26 | | **Halogen Free** | Yes (indicated by the 'G' suffix) | --- ### 2. Physical Characteristics & Pinout The device is housed in a **SOT-26** (also known as TSOP-6) package, which is a small surface-mount package ideal for high-density circuit boards. **Pin Configuration:** 1. **Drain (D)** 2. **Drain (D)** 3. **Gate (G)** 4. **Source (S)** 5. **Drain (D)** 6. **Drain (D)** *(Note: Multiple pins are connected to the Drain to improve thermal dissipation and current handling.)* --- ### 3. Core Features * **Low On-Resistance:** Reduces power loss during the "ON" state, increasing efficiency. * **Fast Switching Speed:** Allows for high-frequency operation in DC-DC converters. * **Low Threshold Voltage:** Can be driven by low-voltage logic circuits. * **P-Channel Architecture:** Simplifies high-side switching circuits as it doesn't require a charge pump (unlike N-Channel MOSFETs). --- ### 4. Common Applications * **Power Management:** Used in battery-powered devices like smartphones and laptops. * **Load Switching:** Acts as a gatekeeper to turn specific sub-systems on or off to save power. * **DC-DC Converters:** Used in buck or boost regulators. * **Battery Protection:** Integrated into BMS (Battery Management Systems) to prevent over-discharge. --- ### 5. Part Number Breakdown * **UT6401**: Part series number. * **G**: Halogen-free and Lead-free (Green). * **AG6**: Package code for SOT-26. * **R**: Tape and Reel packaging.