Key Features and Specifications
The IRF520 is packaged in the TO-220 through-hole case, which is suitable for mounting a heatsink.
| Parameter | Value (Typical/Max) | Description |
| Type | N-Channel Enhancement Mode Power MOSFET | Requires a positive gate-source voltage (V_GS) to turn ON and conduct current. |
| Maximum Drain-Source Voltage | 100 V | The maximum voltage that can be applied across the drain and source. |
| Continuous Drain Current | 9.2 A (at T_C = 25^circC) | The maximum continuous current the MOSFET can handle through the drain. |
| Drain-Source On-Resistance | 0.27 Omega (Max at V_{GS}=10V) | The resistance between the drain and source when the MOSFET is fully ON. A lower value means less power loss and heat generation. |
| Gate Threshold Voltage | 2.0V (Min) to 4.0V (Max) | The voltage required between the gate and source to just barely start the MOSFET turning ON (typically passing a tiny current of 250mu\A). |
| Gate Drive Voltage | 10 V for full turn-on | A Gate-Source voltage of 10V is typically required to achieve the minimum and operate the MOSFET efficiently as a switch. |
| Maximum Power Dissipation | 60 W (with heatsink) | The maximum power it can safely dissipate as heat. |
Pin Configuration
In the standard TO-220 package, the IRF520 has three terminals:
- Gate (G): Controls the MOSFET’s switching state (ON/OFF). This is where the low-power control signal is applied.
- Drain (D): The pin where current enters the MOSFET when it’s conducting.
- Source (S): The pin where current leaves the MOSFET when it’s conducting. (Typically connected to the circuit’s ground in N-Channel configurations).
Common Applications
The IRF520 is a popular component for applications requiring a switch for moderate to high power loads:
- DC Motor Control: Used to turn DC motors ON/OFF or control their speed using Pulse Width Modulation (PWM).
- LED Control: Switching or dimming high-power LED strips and lighting systems.
- Relay Driver: Used to switch a high-current mechanical relay using a low-current control signal.
- Switching Regulators and DC-DC Converters: Employed in power supply circuits.
- DIY and Microcontroller Projects: Commonly found in breakout modules for use with platforms like Arduino, though it’s important to note it is not a logic-level MOSFET and needs a 10V gate voltage for optimal switching efficiency, often requiring a dedicated gate driver circuit if a microcontroller’s 3.3V or 5V output is used.
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