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IRFB4321
  • IRFB4321

IRFB4321

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The StrongIRFET™ power MOSFET family is optimized for low RDS(on) and high current capability. The devices are ideal for low frequency applications requiring performance and ruggedness. The comprehensive portfolio addresses a broad range of applications including DC motors, battery management systems, inverters, and DC-DC converters.

Infineon Technologies IRFB4321 Product Info

16 April 2026 0

Parameters

Budgetary Price €/1k

1.19

ID (@25°C) max

85 A

Mounting

THT

Operating Temperature range

-55 °C to 175 °C

Package

TO-220

Polarity

N

Ptot max

330 W

Qgd

21 nC

QG (typ @10V)

71 nC

RDS (on) (@10V) max

15 mΩ

RthJC max

0.45 K/W

Tj max

175 °C

VDS max

150 V

VGS(th) range

3 V to 5 V

VGS(th)

4 V

VGS max

30 V

Apps

Light electric vehicle solutions, Uninterruptible power supplies (UPS), Offline UPS - high frequency transformer

Features

  • Industry standard through-hole package
  • High-current rating
  • JEDEC standard Product qualification
  • 100kHz Silicon switching applications
  • Softer body-diode vs previous generation
  • Wide portfolio available

Description

  • Drop-in replacement with standard pinout
  • High-current carry capability package
  • Industry standard qualification level
  • High performance, low-frequency
  • Increased power density
  • Flexibility for optimal device selection

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