IRFB20N50K N-Channel Power MOSFET 500V TO-220AB
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Prices updated: 14 Oct 2026
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About this product
The IRFB20N50K is an N-channel power MOSFET rated at 500 V in a TO-220AB package. It is unclamped inductive switching (UIS) rated and has low package inductance, which makes it easier to drive and protect. It suits switch-mode power supplies, power factor correction stages and inverter circuits.
Specifications
- Channel type
- N-channel
- Drain-source voltage (VDSS)
- 500 V
- Continuous drain current (ID)
- 26 A
- Package
- TO-220AB
- Feature
- UIS rated, low package inductance
Frequently asked questions
Can I drive the IRFB20N50K directly from a 3.3 V or 5 V microcontroller pin?
This is not a logic-level MOSFET, so a direct microcontroller drive is not recommended. Use a gate driver or a suitable buffer, and check the gate threshold voltage (Vgs(th)) in the datasheet.
Is it suitable for mains-powered switching circuits?
Its 500 V rating is suitable for bus voltages derived from mains. Rectified 220 V AC gives roughly 310 V DC, which leaves margin below 500 V. Verify the current rating, which should be confirmed in the datasheet for your operating temperature.
