The **UT138FGP-5-TF3-R** is a specific part number typically associated with an **N-Channel Enhancement Mode Power MOSFET**, often manufactured by UTC (Unisonic Technologies Co., Ltd). These components are primarily used for power management and switching applications. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this series, here are the general technical parameters: | Parameter | Specification (Typical) | | :--- | :--- | | **Transistor Polarity** | N-Channel | | **Drain-Source Voltage ($V_{DSS}$)** | 30V - 100V (Varies by sub-series) | | **Continuous Drain Current ($I_D$)** | ~5A to 8A | | **Gate-Source Threshold Voltage ($V_{GS(th)}$)** | 1.0V - 3.0V (Logic Level compatible) | | **Package Type** | SOT-223 or TO-252 (Depending on TF3 code) | | **Configuration** | Single | --- ### 2. Part Number Breakdown The suffixing in UTC part numbers usually indicates the following: * **UT138**: The base model/series identifier. * **G**: Often represents "Halogen Free" or "Green" compliance. * **P**: Can indicate specific electrical grading or lead plating. * **5**: Usually refers to the current rating (approx. 5 Amperes). * **TF3**: Refers to the **TO-252** (D-PAK) package style. * **R**: Indicates **Tape and Reel** packaging for automated assembly. --- ### 3. Common Applications This part is designed for high-efficiency switching and low-voltage applications, including: * **DC-DC Converters:** Used in power supply modules to step down voltage. * **Motor Drivers:** Small DC motor control in consumer electronics. * **Load Switching:** Turning peripheral power rails on/off in laptops or tablets. * **LED Backlighting:** Driving LED strings in display panels. --- ### 4. Features * **Low $R_{DS(ON)}$:** Minimizes power loss during conduction, reducing heat. * **Fast Switching Speed:** Allows for high-frequency operation in PWM circuits. * **Logic Level Drive:** Can be triggered directly by microcontrollers (3.3V or 5V logic). ---