The **UT3419L-AE3-R** is a high-performance, P-channel enhancement mode Field Effect Transistor (MOSFET) produced by UTC (Unisonic Technologies). It is designed for applications requiring high efficiency and low power loss in a compact form factor. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the UT3419L-AE3-R: | Parameter | Symbol | Maximum Rating | | :--- | :--- | :--- | | **Drain-Source Voltage** | $V_{DSS}$ | -30 V | | **Gate-Source Voltage** | $V_{GSS}$ | ±20 V | | **Continuous Drain Current** | $I_D$ | -3.5 A | | **Pulsed Drain Current** | $I_{DM}$ | -15 A | | **Power Dissipation** | $P_D$ | 1.4 W | | **Static Drain-Source On-Resistance** | $R_{DS(ON)}$ | 65 mΩ (Typ) @ -10V | | **Package Type** | SOT-23 | Small Outline Transistor | --- ### 2. Functional Characteristics * **Low On-Resistance:** Its low $R_{DS(ON)}$ minimizes conduction losses, making it suitable for battery-powered devices. * **Fast Switching:** The low gate charge allows the device to switch states rapidly, which is essential for high-frequency PWM applications. * **P-Channel Logic:** As a P-channel MOSFET, it is often used for high-side switching because it can be turned on by pulling the gate voltage lower than the source voltage. * **Halogen-Free:** The "R" in the suffix typically denotes compliance with environmental standards (RoHS/Halogen-Free). --- ### 3. Pin Configuration (SOT-23) The SOT-23 package has three pins, standard for small-signal MOSFETs: 1. **Gate (G):** Controls the state of the MOSFET. 2. **Source (S):** Connected to the positive supply in most high-side applications. 3. **Drain (D):** Connected to the load. --- ### 4. Typical Applications The UT3419L-AE3-R is commonly found in the following circuits: * **Power Management:** DC-DC converters and load switches. * **Battery Protection:** Circuits for mobile phones and portable electronics. * **Load Switching:** Turning on/off specific peripherals in embedded systems. * **Inverters:** Used in small-scale H-bridge or motor driver circuits. ---