IRL520N 100V 10A N-Channel Power MOSFETs
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The IRL520N N-channel power MOSFET in detail.
It's a classic and widely used MOSFET, known for being one of the first to make logic-level gate driving practical for power applications.
Overview
The IRL520N is an N-channel HEXFET® Power MOSFET from International Rectifier (now part of Infineon). Its key defining feature is that it is a logic-level MOSFET. This means it can be fully turned on (saturated) with a gate-to-source voltage (V<sub>GS</sub>) of only 5V, making it ideal for direct control by microcontrollers like Arduino, PIC, or Raspberry Pi without the need for a special gate driver IC.
Key Specifications and Characteristics
Here are the most important specs from the datasheet:
| Parameter | Symbol | Value | Unit | Explanation |
|---|---|---|---|---|
| Drain-Source Voltage | V<sub>DSS</sub> | 100 | V | Maximum voltage between drain and source. |
| Continuous Drain Current | I<sub>D</sub> @ 25°C | 9.2 | A | Max current it can handle at room temperature. This drops significantly with heat. |
| On-Resistance | R<sub>DS(on)</sub> | < 0.22 | Ω | Resistance between drain & source when fully on (V<sub>GS</sub>=5V). Key for efficiency. |
| Gate Threshold Voltage | V<sub>GS(th)</sub> | 1.0 - 2.0 | V | The minimum voltage at which the MOSFET starts to turn on. |
| Gate-Source Voltage | V<sub>GS</sub> | ±16 | V | Absolute max! Exceeding this (even briefly) will destroy the MOSFET. |
| Power Dissipation | P<sub>D</sub> | 60 | W | Max total power it can dissipate (with a perfect heatsink). |
Pinout (TO-220 Package)
The TO-220 package is very common. When facing the flat side (the tab) with the pins facing down:
Gate (G): Left Pin. The control pin. Voltage applied here relative to the Source turns the MOSFET on/off.
Drain (D): Middle Pin. Connected to the load (e.g., motor, light). Also connected to the metal tab.
Source (S): Right Pin. Connected to ground (GND).
Important: The metal tab is electrically connected to the Drain pin. You must isolate it from the heatsink using a mica pad or silicon thermal pad and a plastic shoulder washer for the mounting screw, unless the entire heatsink is meant to be at drain voltage.
Why is it "Logic Level"?
Standard "power" MOSFETs often require 10V on the gate to achieve their full low R<sub>DS(on)</sub>. A microcontroller pin can only output 3.3V or 5V, which would leave a standard MOSFET only partially on, causing it to overheat due to high resistance.
The IRL520N is specifically designed to have a very low R<sub>DS(on)</sub> (0.22Ω max) with only 5V on the gate, making it a perfect match for logic chips and microcontrollers.
Typical Applications
The IRL520N is used as a low-side switch. This means the load is connected between the positive supply (V<sub>CC</sub>) and the Drain, and the Source is connected directly to ground.
DC Motor Control
Solenoid or Relay Drivers
LED Strip Dimming (PWM)
Heating Element Control
General Purpose Power Switching
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৳320.00
