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IRF840PBF

N-Channel MOSFET, 500V, 8A, 0.85 Ohm, TO-220AB

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Manufacturer Part：

IRF840PBF

Package：

TO-220AB (10.54 x 4.69 x 15.24 mm, through-hole)

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Description

Product Overview

The IRF840PBF from Infineon is an N-channel power MOSFET rated at 500V VDSS with 8A drain current and 0.85 Ohm RDS(on). In TO-220AB package, this HEXFET device is widely used in high-voltage switching applications.

Key Specifications

VDSS 500V
ID 8A @ TC=25C
RDS(on) 0.85 Ohm max
VGS(th) 2.0 to 4.0V
Qg 63nC typical
PD 125W @ TC=25C
Package TO-220AB

Features

  • HEXFET power MOSFET technology
  • 500V breakdown for off-line applications
  • Fully avalanche rated
  • Dynamic dv/dt rated
  • Lead-free, RoHS compliant

Applications

  • Switch-mode power supplies
  • Motor drive inverters
  • High-voltage DC-DC converters
  • Power factor correction circuits

The IRF840PBF is a classic N-channel enhancement-mode power MOSFET from the Infineon HEXFET family. With 500V drain-source rating and 8A continuous current, it is a workhorse device in off-line SMPS, motor drives, and power conversion systems. The 0.85 Ohm on-resistance and 63nC gate charge suit moderate-frequency switching. TO-220AB package provides 125W dissipation when heatsinked.

The IRF840PBF operates as a voltage-controlled N-channel MOSFET. (1) Off: No channel exists when VGS is below threshold, blocking up to 500V. (2) On: VGS above threshold creates inversion layer, RDS(on) = 0.85 Ohm max. (3) Switching: Qg=63nC must be supplied/removed for transitions. (4) Avalanche: Fully rated to absorb inductive kickback energy without external clamping.

Pin Name Function
1 Gate Gate control input
2 Drain Drain terminal (tab)
3 Source Source terminal
  • Off-line SMPS: 500V rating for 110V/220V AC-input power supplies
  • Motor drive: 8A capability for small BLDC/PMSM motors
  • HV DC-DC converters: Forward and flyback topologies for telecom power
  • Lighting ballasts: High-voltage fluorescent and HID lamp circuits
Manufacturer Part Number Package Notes
Infineon IRF840LPBF D2PAK SMD version
ST STW8NM50 TO-247 500V, 8A, lower RDS(on)
Vishay IRF840A TO-220AB Direct equivalent
Infineon IRFP460PBF TO-247 500V, 20A, higher current
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Contact Information

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Service & Packaging

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Contact Information

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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