The IRF820 is a high-voltage N-Channel power MOSFET commonly used in offline power supplies and switching circuits. This article explains the IRF820 pinout, features, specifications, working principle, applications, and suitable alternatives in a clear and consistent format.
Introduction
The IRF820 is an enhancement-mode N-Channel MOSFET designed for high-voltage, low-to-moderate current applications. Due to its 500V drain-source rating, it is widely used in AC-DC converters, SMPS, and other high-voltage switching environments where reliability and efficiency are critical.
Pin Configuration / Pinout of IRF820 MOSFET
Understanding the IRF820 Pinout Configuration
The IRF820 is housed in a TO-220 package with a standard G-D-S pin configuration:
| Pin# | Pin Name |
|---|---|
| 1 | Gate |
| 2 | Drain |
| 3 | Source |
Correct implementation of the IRF820 pinout is essential for safe and efficient circuit operation.
Note: DATASHEET DOWNLOAD button is provided end of this article.
IRF820 Key Features
- High-voltage N-Channel MOSFET
- Suitable for offline and SMPS designs
- Fast switching performance
- Low gate drive power requirement
- Rugged structure for reliable operation
- TO-220 package for easy heat sinking
IRF820 Specifications / Characteristics
- Drain-Source Voltage (VDS): 500V
- Gate-Source Voltage (VGS): ±20V
- Continuous Drain Current (ID): 2.5A
- Pulsed Drain Current (IDM): 10A
- Power Dissipation (PD): 80W
- Junction Temperature (Tj): 150°C
- Storage Temperature Range (Tstg): −65°C to +150°C
- Package Type: TO-220
- Pin Configuration: Gate – Drain – Source
Key Applications of IRF820 MOSFET
- Switch-mode power supplies (SMPS)
- Offline AC-DC converters
- High-voltage electronic switches
- Power inverters
- Industrial power control circuits
IRF820 Equivalent / Alternatives
(Verify pin compatibility before using substitutions)
Equivalent MOSFETs: IRF840, IRF830
Alternative MOSFETs: FQP3N60, STP4NK60Z, 2SK3563
More Circuit Layouts
Working Principle of IRF820
The IRF820 operates by applying a positive voltage between the gate and source terminals. When this voltage exceeds the threshold level, a conductive channel forms, allowing current to flow from drain to source. Removing the gate voltage stops conduction, making the device ideal for high-voltage switching applications.
Frequently Asked Questions (FAQ)
Q1: What is the maximum voltage rating of IRF820?
The IRF820 supports up to 500V drain-source voltage.
Q2: What is the pin configuration of IRF820?
It uses a Gate-Drain-Source (G-D-S) configuration in a TO-220 package.
Q3: Is IRF820 suitable for SMPS circuits?
Yes, it is commonly used in offline SMPS and high-voltage switching designs.
Q4: Does IRF820 require a heat sink?
Yes, a heat sink is recommended when operating near maximum power levels.
Conclusion
The IRF820 N-Channel MOSFET is a reliable choice for high-voltage power switching applications. With its strong voltage handling capability, stable performance, and easy integration in TO-220 form, it remains a popular solution for SMPS, converters, and industrial power electronics.
Datasheet of IRF820 MOSFET
Click the following Button below to download the datasheet of IRF820 :
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