The **UTD36N03L-TN3-R** is an N-Channel enhancement mode Power MOSFET manufactured by Unisonic Technologies (UTC). It is primarily designed for high-efficiency power management and switching applications. --- ## 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the device: | Parameter | Symbol | Maximum Rating | | :--- | :---: | :--- | | **Drain-Source Voltage** | $V_{DSS}$ | 30V | | **Gate-Source Voltage** | $V_{GSS}$ | ±20V | | **Continuous Drain Current** | $I_D$ | 36A | | **Pulsed Drain Current** | $I_{DM}$ | 72A | | **Drain-Source On-Resistance** | $R_{DS(ON)}$ | 16mΩ (typ) @ $V_{GS}=10V$ | | **Power Dissipation** | $P_D$ | 44W (at $T_C=25^\circ C$) | | **Package Type** | TO-252 | DPAK (Surface Mount) | --- ## 2. Structural Features The UTD36N03L is built using UTC's advanced trench technology. This architecture provides several advantages: * **Low $R_{DS(ON)}$:** Reduces conduction losses, making it energy efficient. * **Fast Switching Speed:** High-density cell design allows for rapid transitions between states. * **Logic Level Trigger:** The "L" in the part number often indicates a logic-level gate drive, meaning the MOSFET can be fully turned on by a 5V signal from a microcontroller. --- ## 3. Package and Pinout The **TN3** suffix indicates the **TO-252 (DPAK)** package, which is a standard surface-mount power package. | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | **Gate (G)** | Controls the turning on/off of the MOSFET. | | **2** | **Drain (D)** | Connected to the load; also tied to the metal tab. | | **3** | **Source (S)** | Connected to the ground or negative supply. | --- ## 4. Common Applications Due to its high current handling and low resistance, this part is frequently found in: * **DC-DC Converters:** Used in Buck or Boost regulators. * **Motor Control:** Driving small to medium DC motors. * **Power Management:** Battery protection circuits and load switches in portable electronics. * **Computer Motherboards:** Switching regulators for CPU or memory power rails. --- ## 5. Ordering Information Breakdown The part number follows a specific nomenclature: * **UTD:** UTC N-Channel MOSFET Series. * **36:** Rated Current (approx. 36A). * **N03:** Rated Voltage (30V). * **L:** Logic Level Gate Drive. * **TN3:** Package Code (TO-252). * **R:** Tape and Reel packaging.