The **2N65LL-TN3-R** is a specific part number for a Power MOSFET, typically manufactured by UTC (Unisonic Technologies). This component is designed for high-voltage, high-speed switching applications. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics: | Code Segment | Meaning | | :--- | :--- | | **2N65** | Refers to the series (2 Amps, 650 Volts). | | **LL** | Low Gate Charge / Low Leakage version. | | **TN3** | Package Type: TO-252 (D-PAK). | | **R** | Tape & Reel packaging. | --- ### 2. Key Technical Specifications The "2N65" series generally follows these electrical parameters: * **Drain-Source Voltage ($V_{DSS}$):** 650V * *High voltage rating suitable for AC/DC converters.* * **Continuous Drain Current ($I_D$):** 2.0A * *Maximum current the device can handle at 25°C.* * **Static Drain-Source On-Resistance ($R_{DS(ON)}$):** ~4.0Ω to 5.0Ω * *Lower resistance leads to less heat dissipation during operation.* * **Gate Charge ($Q_g$):** Low * *Allows for faster switching speeds and reduced drive power requirements.* --- ### 3. Physical Package (TO-252 / D-PAK) The **TN3** suffix indicates the **TO-252** package, which is a surface-mount device (SMD). * **Compact size:** Ideal for high-density PCB designs. * **Heat Dissipation:** Includes a large metal tab (connected to the Drain) to be soldered to the PCB for thermal management. * **Pin Configuration:** 1. Gate 2. Drain (connected to the thermal tab) 3. Source --- ### 4. Common Applications Due to its 650V rating and 2A capacity, this MOSFET is frequently used in: * **Switch Mode Power Supplies (SMPS):** Used as the primary switching element. * **LED Drivers:** Controlling power to high-voltage LED strings. * **Electronic Ballasts:** For lighting equipment. * **DC-DC Converters:** High-efficiency power conversion. --- ### 5. Equivalent/Alternative Parts If this specific UTC part is unavailable, common equivalents with similar specs include: * **STD2N65M2** (STMicroelectronics) * **FQPF2N65C** (onsemi - though package may vary) * **SPD02N65** (Infineon)