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Infineon Technologies IRFZ44VZ — Discrete Semiconductors

IRFZ44VZ N-Channel MOSFET, 60 V, 57 A, TO-220-3

MPNIRFZ44VZ
Obsolete

IRFZ44VZ, International Rectifier HEXFET® N-Channel MOSFET, 60 V drain-source, 57 A continuous drain, 12 mOhm Rds(on) at 10 V, 65 nC gate charge, TO-220-3 (TO-220AB), -55 to 175 °C.

$1.8800Ref. price · indicative, final on quote
Infineon Technologies IRFZ44VZ datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

IRFZ44VZ specifications
ParameterValue
SeriesHEXFET®
FET typeN-Channel
MountingThrough Hole
Drain to source voltage60 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C57A (Tc)
Power dissipation92W (Tc)
Operating temperature-55°C ~ 175°C (TJ)
PackageTube
Vgs±20V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3
Vgs(th) (Max) @ id4V @ 250µA
Rds on (Max) @ id, vgs12mOhm @ 34A, 10V
Gate charge (Qg) (Max) @ vgs65 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1690 pF @ 25 V

Product details

The IRFZ44VZ is an International Rectifier HEXFET® N-channel power MOSFET in a through-hole TO-220-3 (TO-220AB) package. Gate charge is 65 nC at 10 V.

The 12 mOhm maximum on-resistance at 34 A and 10 V gate-source is the number that sizes the heatsink and sets the I²R loss in the power path. At 57 A continuous drain, the conduction loss at 12 mOhm is about 39 W, which the 92 W package dissipation limit can handle with adequate thermal management — a TO-220 bolted to a heatsink with thermal compound.

65 nC gate charge — switching speed budget

Input capacitance is 1690 pF at 25 V drain-source.

Obsolete — sourcing and replacement reality

For new designs or BOM continuity, the replacement path is not a direct pin-compatible drop-in from the same series — the IRFZ44VZ was a specific variant in the HEXFET family. If you are qualifying a replacement, the closest functional sibling in the same TO-220 footprint with 60 V / 57 A class ratings would be the IRFZ44N or IRFZ44Z, but verify gate charge, Rds(on), and temperature range against your switching frequency and thermal budget before committing the BOM line.

Frequently asked questions

Is IRFZ44VZ obsolete or EOL?

Yes, the IRFZ44VZ is listed as obsolete. It is no longer manufactured by International Rectifier / Infineon.

What is the replacement for IRFZ44VZ?

There is no single official pin-compatible replacement announced by the manufacturer. The IRFZ44N and IRFZ44Z are functional siblings in the same TO-220 footprint with similar 60 V / 55–60 A ratings, but you must compare Rds(on), gate charge, and temperature range against your specific switching frequency and thermal design before substituting.

What are the specifications of IRFZ44VZ?

It comes in a through-hole TO-220-3 (TO-220AB) package.

Is IRFZ44VZ compatible with IRFZ44N?

The IRFZ44N and IRFZ44VZ share the same TO-220 footprint and similar voltage/current class (55–60 V, 55–57 A), but the IRFZ44VZ has a lower Rds(on) of 12 mOhm versus the IRFZ44N's typical 17.5 mOhm. Gate charge and input capacitance also differ. They are not drop-in equivalents without verifying the gate drive circuit and thermal performance at your operating point.