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Infineon Technologies IRFZ44ZLPBF — Discrete Semiconductors

IRFZ44ZLPBF HEXFET N-Channel MOSFET, 55V, 13.9mOhm, TO-262

MPNIRFZ44ZLPBF
Last Buy

Infineon IRFZ44ZLPBF HEXFET N-Channel MOSFET, 55 V Vdss, 51 A Id, 13.9 mOhm Rds(on) at 10 V, 43 nC Qg, TO-262-3 (I²Pak), -55°C to 175°C.

$2.1800Ref. price · indicative, final on quote
Infineon Technologies IRFZ44ZLPBF datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

IRFZ44ZLPBF specifications
ParameterValue
SeriesHEXFET®
FET typeN-Channel
MountingThrough Hole
Drain to source voltage55 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C51A (Tc)
Power dissipation80W (Tc)
Operating temperature-55°C ~ 175°C (TJ)
PackageTube
Vgs±20V
TechnologyMOSFET (Metal Oxide)
CaseTO-262-3 Long Leads, I²Pak, TO-262AA
Vgs(th) (Max) @ id4V @ 250µA
Rds on (Max) @ id, vgs13.9mOhm @ 31A, 10V
Gate charge (Qg) (Max) @ vgs43 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1420 pF @ 25 V

Product details

Junction rating to 175°C — military-temperature headroom

Last Buy — plan the BOM now

That means the manufacturer has announced end-of-life and is accepting final orders within a defined window. After that window closes, the only channel is surplus and broker inventory. If this part is on your active BOM, the decision is whether to secure a last-time-buy quantity for the product's remaining life or to qualify a pin-compatible replacement before the window shuts.

Package and mounting — through-hole TO-262

The TO-262-3 (I²Pak, TO-262AA) is a through-hole package with long leads, designed for board mounting where the tab is soldered to a PCB pad or clamped to a heatsink. The through-hole format is preferred in high-vibration environments and for prototyping, though it takes more board area than a surface-mount D²Pak.

Frequently asked questions

Is IRFZ44ZLPBF obsolete or still available?

It is not yet obsolete, but the manufacturer has announced end-of-life and is accepting final orders within a defined window. After that window closes, availability will be limited to surplus and broker inventory.

What is the Rds(on) of IRFZ44ZLPBF?

The maximum on-resistance is 13.9 mOhm at a drain current of 31 A and a gate-source voltage of 10 V. That is the spec to use for conduction-loss calculations in a switching application.