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Original IRF540N – IRF540 N-Channel MOSFET Transistor (TO-220 Package)

 

Original IRF540N – IRF540 N-Channel MOSFET Transistor (TO-220 Package)







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Introduction

The IRF540N is a popular N-channel power MOSFET widely used in electronics and power control applications. Known for its reliability and high current handling, this transistor comes in a TO-220 package, making it easy to mount on heat sinks and suitable for DIY as well as industrial projects.

What Is an N-Channel MOSFET?

An N-channel MOSFET is a voltage-controlled device used to switch or amplify electronic signals. When a voltage is applied to the gate (G) terminal, it allows current to flow between the drain (D) and source (S) terminals.

How IRF540N Works

  • Applying a positive voltage to the gate turns the MOSFET ON

  • Current flows from drain to source

  • Removing gate voltage turns it OFF

  • Very little current is required at the gate, making it efficient

Key Specifications

  • Model: IRF540N

  • Type: N-Channel MOSFET

  • Package: TO-220

  • Drain-Source Voltage (Vds): 100V

  • Continuous Drain Current (Id): 33A

  • Gate Threshold Voltage: 2–4V

  • Low Rds(on): High efficiency

Pin Configuration (TO-220)

  1. Gate (G)

  2. Drain (D)

  3. Source (S)
    (Metal tab is connected to Drain)

Applications

  • DC motor control

  • Inverter circuits

  • Power supplies

  • LED drivers

  • Relay and solenoid switching

  • Arduino and microcontroller projects

DIY Project Ideas Using IRF540N

1️⃣ DC Motor Speed Controller

Use PWM from Arduino to control motor speed efficiently.

2️⃣ High-Power LED Driver

Drive high-current LEDs with stable switching.

3️⃣ Battery-Powered Inverter

Use IRF540N in low-frequency inverter designs.

Advantages

  • Handles high current

  • Easy to drive

  • Readily available

  • Suitable for high-power applications

Limitations

  • Not logic-level MOSFET (needs proper gate drive)

  • Requires heat sink for high current use

How to Identify an Original IRF540N

  • Clear and sharp laser marking

  • Proper weight and finish

  • Buy from trusted suppliers

Conclusion

The Original IRF540N N-Channel MOSFET Transistor is a reliable choice for power electronics and DIY projects. With proper gate drive and heat management, it delivers excellent performance in switching and control applications.

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