Skip to main content
Infineon Technologies IRFI4321PBF

IRFI4321PBF HEXFET N-Channel 150V 34A MOSFET

MPNIRFI4321PBF
End of Life

IRFI4321PBF, HEXFET® N-Channel MOSFET, 150 V Vdss, 34 A Id, 16 mOhm Rds(on) at 10 V, 110 nC Qg, TO-220-3 Full Pack, -55°C to 150°C.

$3.47Ref. price · indicative, final on quote
PackagingTO-220-3 Full Pack
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

IRFI4321PBF Technical Specifications
ParameterValue
SeriesHEXFET®
FET typeN-Channel
Mounting typeThrough Hole
Drain to source voltage150 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C34A (Tc)
Power dissipation46W (Tc)
Operating temperature-55°C ~ 150°C (TJ)
PackageTube
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3 Full Pack
Vgs(th) (Max) @ id5V @ 250µA
Rds on (Max) @ id, vgs16mOhm @ 20A, 10V
Gate charge (Qg) (Max) @ vgs110 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds4440 pF @ 50 V

Product details

150 V, 34 A, 16 mOhm — what this N-channel HEXFET delivers

Gate charge totals 110 nC at 10 V, which sets the switching-speed ceiling: expect clean hard-switching up to the low tens of kHz before gate-drive current becomes a design constraint. Input capacitance is 4440 pF at 50 V drain-source.

Full-Pak package — no insulator needed in the field

The TO-220 Full-Pak (TO-220AB Full-Pak) isolates the metal tab electrically, so you can bolt it directly to a heatsink without a mica or silicone-pad insulator. That saves a part and a step on the assembly line — and if you are swapping this in the field, it is one less thing to lose. Through-hole mounting (3-lead TO-220) is mechanically robust for high-vibration environments like motor drives, industrial power supplies, and automotive under-hood modules. The 46 W power dissipation at case temperature gives the thermal budget for a modest heatsink in still air.

Temperature range and production status

The 150°C ceiling also provides headroom for high-current operation with a heatsink.

Frequently asked questions

What is the Rds(on) of IRFI4321PBF?

This is the figure to use for worst-case conduction-loss calculations in your thermal model.

Is IRFI4321PBF RoHS compliant?

Yes, the IRFI4321PBF is ROHS3 compliant, meaning it meets the EU RoHS directive for lead-free and restricted-substance limits.