The **NK5M5N-R** is an N-Channel enhancement mode Power MOSFET, typically manufactured by companies like **NIKO-SEM**. It is designed for high-efficiency power management and switching applications, commonly found in computer motherboards and power supplies. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the NK5M5N-R: | Parameter | Symbol | Typical Value | Unit | | :--- | :--- | :--- | :--- | | **Drain-Source Voltage** | $V_{DS}$ | 30 | Volts | | **Gate-Source Voltage** | $V_{GS}$ | ±20 | Volts | | **Continuous Drain Current** | $I_D$ | 40 - 50* | Amperes | | **Static Drain-Source On-Resistance** | $R_{DS(on)}$ | ~5.5 - 7.5 | mΩ | | **Total Gate Charge** | $Q_g$ | 15 - 20 | nC | | **Package Type** | - | TO-252 (D-PAK) | - | *\*Current rating depends on specific thermal dissipation and PCB mounting.* --- ### 2. Physical Characteristics & Pinout The device usually comes in a **TO-252 (D-PAK)** surface-mount package, which is designed for high-density mounting with good thermal conductivity. * **Pin 1 (Gate):** Controls the switching of the MOSFET. * **Pin 2 (Drain):** Connected to the load (The large metal tab is also the Drain). * **Pin 3 (Source):** Connected to the ground or negative side of the circuit. --- ### 3. Core Features * **Low On-Resistance ($R_{DS(on)}$):** Minimizes power loss during conduction, which reduces heat generation. * **Fast Switching Speed:** Allows the component to be used in high-frequency DC-DC converters. * **Logic Level Compatibility:** Can be triggered by low voltage signals (typically 4.5V to 10V), making it compatible with various microcontrollers and PWM ICs. * **RoHS Compliant:** Manufactured without hazardous substances like lead. --- ### 4. Common Applications Due to its high current handling and low resistance, the NK5M5N-R is frequently used in: 1. **Motherboard VRMs:** Voltage Regulator Modules for CPU/RAM power. 2. **DC-DC Converters:** Buck or Boost converters for portable electronics. 3. **Battery Management:** Protection circuits and charging modules. 4. **LED Drivers:** High-current switching for lighting systems. ---