The **SW4N60DA** is an N-Channel enhancement mode power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). It is primarily designed for high-voltage, high-speed switching applications, such as power supplies and motor drivers. --- ### 1. Key Technical Specifications The part number "4N60" typically provides a shorthand for its primary ratings: **4 Amperes** and **600 Volts**. | Parameter | Symbol | Value | | :--- | :--- | :--- | | Drain-Source Voltage | $V_{DSS}$ | 600 V | | Continuous Drain Current | $I_D$ | 4.0 A | | Pulsed Drain Current | $I_{DM}$ | 16 A | | Gate-Source Voltage | $V_{GS}$ | ±30 V | | Static Drain-Source On-Resistance | $R_{DS(on)}$ | ~2.0 - 2.5 $\Omega$ (Max) | | Total Gate Charge | $Q_g$ | ~15 - 20 nC | --- ### 2. Physical Characteristics The "DA" suffix often refers to the specific packaging and internal diode configuration. It is most commonly found in the **TO-220** or **TO-220F** (insulated) package. * **Pinout Configuration:** 1. **Gate (G):** Controls the switching of the MOSFET. 2. **Drain (D):** Connected to the high-voltage load. 3. **Source (S):** Connected to the ground or common return. --- ### 3. Core Features * **Low Gate Charge:** Allows for faster switching speeds and reduced drive power requirements. * **Low $R_{DS(on)}$:** Minimizes conduction losses, leading to higher efficiency. * **High Ruggedness:** Designed to withstand high voltage spikes (Avalanche ruggedness). * **Internal Diode:** Includes a robust body diode with fast recovery characteristics. --- ### 4. Common Applications Due to its high voltage rating and moderate current capacity, it is used in: 1. **Switch Mode Power Supplies (SMPS):** Acting as the main switching element in AC-DC converters. 2. **LED Drivers:** Controlling power flow in high-brightness LED lighting systems. 3. **DC-DC Converters:** Stepping voltages up or down in industrial equipment. 4. **Electronic Ballasts:** Used in fluorescent lighting circuits. --- ### 5. Schematic Symbol Representation ```text Drain (D) | +----+----+ | | | Gate--||<---+ (Body Diode) (G) | | +----+----+ | Source (S) ```