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Infineon Technologies IRFZ44NSTRLPBF — Discrete Semiconductors

IRFZ44NSTRLPBF N-Channel MOSFET, 55V 49A D2PAK

MPNIRFZ44NSTRLPBF
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Infineon IRFZ44NSTRLPBF HEXFET® N-Channel MOSFET, 55V Vdss, 49A Id, 17.5mOhm Rds(on) @ 25A, 10V, TO-263-3 D2PAK, -55°C to 175°C.

$1.5500Ref. price · indicative, final on quote
Infineon Technologies IRFZ44NSTRLPBF datasheet (PDF)
PackagingTO-263-3, D²Pak (2 Leads + Tab), TO-263AB
RoHSROHS3 Compliant
SeriesHEXFET®
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

IRFZ44NSTRLPBF specifications
ParameterValue
SeriesHEXFET®
FET typeN-Channel
MountingSurface Mount
Drain to source voltage55 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C49A (Tc)
Power dissipation3.8W (Ta), 94W (Tc)
Operating temperature-55°C ~ 175°C (TJ)
PackageTape & Reel (TR) Cut Tape (CT)
Vgs±20V
TechnologyMOSFET (Metal Oxide)
CaseTO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Vgs(th) (Max) @ id4V @ 250µA
Rds on (Max) @ id, vgs17.5mOhm @ 25A, 10V
Gate charge (Qg) (Max) @ vgs63 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1470 pF @ 25 V

Product details

55 V, 49 A, 17.5 mOhm — the numbers that matter

A standard gate driver with 1 A peak output will switch it cleanly at tens of kilohertz; no exotic driver needed.

175 °C junction — keeps working where others quit

That 175 °C ceiling is the key spec for under-hood automotive, industrial oven controls, or any environment where ambient heat pushes a standard 150 °C MOSFET into derating.

D2PAK footprint — what to check on the board

The package is TO-263-3 (D²Pak, 2 leads plus tab), surface mount.

ROHS3 compliant — no paperwork surprises

No lead, no cadmium, no hexavalent chromium in the bill.

Frequently asked questions

Can IRFZ44NSTRLPBF replace IRFZ44N in a D2PAK design?

The base product number is IRFZ44, and the package is D2PAK (TO-263-3). The 'STRLPBF' suffix indicates tape-and-reel packaging and ROHS3 compliance. Electrically it matches the IRFZ44N ratings — 55 V, 49 A, 17.5 mOhm Rds(on) — so it is a drop-in replacement for any D2PAK IRFZ44N variant.

What is the closest functional second-source for IRFZ44NSTRLPBF if stock is low?

The IPD50R950CEAUMA1 is a CoolMOS CE N-channel MOSFET in a similar DPAK package, but it is a 500 V, 4.3 A device with 950 mOhm Rds(on) — a completely different voltage and current class. It is not a functional second-source for the 55 V, 49 A IRFZ44N. For a true alternative, look for another 55 V, 49 A D2PAK MOSFET with similar Rds(on).