Skip to main content
Log in
Infineon Technologies IRFS7437TRLPBF

IRFS7437TRLPBF N-Channel MOSFET, 40V 195A

MPNIRFS7437TRLPBF
End of Life

Infineon IRFS7437TRLPBF, HEXFET® StrongIRFET™, N-Channel MOSFET, 40V Vdss, 195A Id, 1.8mOhm Rds(on) at 10V, 225nC Qg, D2PAK (TO-263AB), -55°C to 175°C.

$2.42Ref. price · indicative, final on quote
Infineon Technologies IRFS7437TRLPBF datasheet (PDF)
PackagingTO-263-3, D²Pak (2 Leads + Tab), TO-263AB
RoHSROHS3 Compliant
SeriesHEXFET®, StrongIRFET™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

IRFS7437TRLPBF specifications
ParameterValue
SeriesHEXFET®, StrongIRFET™
FET typeN-Channel
MountingSurface Mount
Drain to source voltage40 V
Drive voltage (Max rds on, min rds on)6V, 10V
Current - continuous drain (Id) @ 25°C195A (Tc)
Power dissipation230W (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) @ id3.9V @ 150µA
Rds on (Max) @ id, vgs1.8mOhm @ 100A, 10V
Gate charge (Qg) (Max) @ vgs225 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds7330 pF @ 25 V

Product details

The Infineon IRFS7437TRLPBF is a 40V N-channel MOSFET from the HEXFET® StrongIRFET™ family, built for high-current switching in DC/DC converters, motor drives, and battery management. The 1.8 mOhm typical on-resistance at 100A and 10V gate drive keeps conduction losses low, which matters when the load current pushes into the tens of amps and the PCB copper is already working hard to pull heat. Gate charge of 225 nC at 10V sets the drive budget: a gate-driver IC needs to source and sink that charge fast enough to hit the target switching frequency without excessive cross-conduction. The 195A continuous drain rating at 25°C case temperature gives headroom for pulsed loads, but the 230W power dissipation limit is the real constraint — thermal design, not the current number, decides how much the part can actually deliver in the enclosure.

Package and mounting — D2PAK footprint, surface-mount assembly

The TO-263AB (D2PAK) package with two leads and a tab is a surface-mount power package. No through-hole mounting here — this part sits on the board, not through it.

The IRFS7437TRLPBF lifecycle status is active. ROHS3 compliance is current.

Frequently asked questions

What is the Rds(on) of IRFS7437TRLPBF?

The maximum on-resistance is 1.8 mOhm at 100A drain current with a 10V gate drive. That is the spec that drives conduction loss in the switching loop.

What is the difference between IRFS7437TRLPBF and IRFS7437PBF?

The difference is the packaging format. IRFS7437TRLPBF ships in Tape & Reel (TR), the standard for automated pick-and-place assembly. IRFS7437PBF is typically the tube or bulk variant. The die, electrical specs, and package (D2PAK) are identical.