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Infineon Technologies IRLZ44NSTRR — Discrete Semiconductors

IRLZ44NSTRR HEXFET N-Channel MOSFET, 55V 47A, D2PAK

MPNIRLZ44NSTRR
Obsolete

Infineon HEXFET® series, IRLZ44NSTRR, N-Channel MOSFET, 55 V drain-source, 47 A continuous drain, 22 mOhm Rds(on) at 10 V, logic-level gate drive, D2PAK surface mount, -55 to 175 °C junction temperature.

$1.3900Ref. price · indicative, final on quote
Infineon Technologies IRLZ44NSTRR datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

IRLZ44NSTRR specifications
ParameterValue
SeriesHEXFET®
FET typeN-Channel
MountingSurface Mount
Drain to source voltage55 V
Drive voltage (Max rds on, min rds on)4V, 10V
Current - continuous drain (Id) @ 25°C47A (Tc)
Power dissipation3.8W (Ta), 110W (Tc)
Operating temperature-55°C ~ 175°C (TJ)
PackageTape & Reel (TR)
Vgs±16V
TechnologyMOSFET (Metal Oxide)
CaseTO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Vgs(th) (Max) @ id2V @ 250µA
Rds on (Max) @ id, vgs22mOhm @ 25A, 10V
Gate charge (Qg) (Max) @ vgs48 nC @ 5 V
Input capacitance (Ciss) (Max) @ vds1700 pF @ 25 V

Product details

Its on-resistance maxes at 22 mOhm when driven with 10 V on the gate at 25 A — that is the number you plug into the conduction loss calculation for a motor drive or DC-DC converter. The logic-level gate-drive spec (rated for 4 V and 10 V) means a 5 V microcontroller output can pull the gate above threshold without a separate driver stage, though the 48 nC gate charge at 5 V still needs a driver with enough peak current to keep switching edges clean.

D2PAK surface-mount — footprint and thermal reality

The D2PAK (TO-263-3) package with exposed tab is the surface-mount version of the TO-220. At ambient, with no heatsink, derate to 3.8 W.

The IRLZ44NSTRR is listed as obsolete. A pin-compatible surface-mount substitute would need to match the D2PAK footprint, 55 V Vdss, and logic-level threshold; the IRLR8726PbF in DPAK or the IRLB8748PbF in D2PAK are worth evaluating, but neither is a guaranteed second source.

Frequently asked questions

What is the Rds(on) of the IRLZ44NSTRR?

The maximum on-resistance is 22 mOhm at 25 A drain current with 10 V gate drive. At 4 V gate drive (logic-level minimum) the Rds(on) is higher — the datasheet curve should be checked for the exact value at your operating point.

Where can I buy the IRLZ44NSTRR?

It is available to order against an RFQ — submit a request for current availability and pricing. No stock or price is listed on this page.