IRL540N N-Channel Power MOSFET
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৳320.00
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The IRL540N N-channel power MOSFET in detail.
It's a very popular and versatile MOSFET that has been a workhorse in hobbyist and professional projects for years.
Overview
The IRL540N is an N-channel HEXFET Power MOSFET from International Rectifier (now part of Infineon). Its key feature is that it is logic-level, meaning it can be fully turned on (saturated) with a gate-to-source voltage (V_GS) of just 5V. This makes it perfect for direct control from microcontrollers like Arduino, Raspberry Pi, PICs, and AVRs without needing a special driver circuit.
Key Specifications and Characteristics
Here are the most important numbers from the datasheet:
| Parameter | Symbol | Value | Unit | Explanation |
|---|---|---|---|---|
| Drain-Source Voltage | V_DS | 100 | V | Max voltage between drain and source. |
| Continuous Drain Current | I_D | 36 | A | Max current it can handle at T_c = 100°C. Note: This is with a perfect heatsink! |
| Pulsed Drain Current | I_DM | 140 | A | Max short pulse current. |
| Gate-Source Voltage | V_GS | ±20 | V | Max voltage on the gate. Never exceed this! |
| On-Resistance | R_DS(on) | 0.077 Ω (max) | Ω | Resistance when fully ON. Key for efficiency. @ V_GS=10V |
| 0.11 Ω (max) | Ω | Resistance when fully ON. @ V_GS=5V (Logic Level!) | ||
| Gate Threshold Voltage | V_GS(th) | 1.0 - 2.0 | V | Min voltage to start turning on. Fully on requires more. |
| Total Gate Charge | Q_g | 70 | nC | Charge needed to switch the gate. Determines switching speed. |
| Package | TO-220AB | Classic, easy-to-mount package with a hole for a heatsink. |
Why is it so Popular? (Advantages)
Logic-Level Gate Drive: Works seamlessly with 5V and 3.3V logic. You can drive it directly from an Arduino pin (output ~5V).
Low On-Resistance (R_DS(on)): At only 0.11Ω when driven with 5V, it acts almost like a mechanical switch. This means very little power is lost as heat (P = I² * R) during operation. For example, with a 10A load, power loss is only
(10²) * 0.11 = 11W.High Current Handling: A rated 36A is more than enough for most DIY projects (motors, LED strips, heaters, etc.).
TO-220 Package: Robust, easy to solder, and designed to be attached to a heatsink for high-power applications.
Pinout (TO-220 Package)
When facing the flat side (the tab) with the pins down:
Gate (G): Left Pin
Drain (D): Middle Pin (Connected to the metal tab!)
Source (S): Right Pin
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৳320.00
