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Infineon Technologies IRF9540NSPBF — Discrete Semiconductors

IRF9540NSPBF P-Channel MOSFET, 100 V, 23 A, D2PAK

MPNIRF9540NSPBF
End of Life

Infineon HEXFET® IRF9540NSPBF, P-Channel MOSFET, 100 V Vdss, 23 A Id, 117 mΩ Rds(on) at 10 V, D2PAK (TO-263), -55°C to 150°C.

$1.9100Ref. price · indicative, final on quote
Infineon Technologies IRF9540NSPBF datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

IRF9540NSPBF specifications
ParameterValue
SeriesHEXFET®
FET typeP-Channel
MountingSurface Mount
Drain to source voltage100 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C23A (Tc)
Power dissipation3.1W (Ta), 110W (Tc)
Operating temperature-55°C~150°C(TJ)
PackageTube
Vgs±20V
TechnologyMOSFET (Metal Oxide)
CaseTO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Vgs(th) (Max) @ id4V @ 250µA
Rds on (Max) @ id, vgs117mOhm @ 14A, 10V
Gate charge (Qg) (Max) @ vgs110 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1450 pF @ 25 V

Product details

P-Channel 100 V HEXFET in D2PAK

The Infineon IRF9540NSPBF is a P-Channel enhancement-mode MOSFET from the HEXFET series, built with planar stripe technology. The P-Channel polarity simplifies high-side load switching — no charge pump needed — which is why you see these in battery protection, reverse-polarity blocking, and 48 V telecom hot-swap circuits.

That's moderate for a 100 V P-Channel: the gate driver needs to source and sink enough peak current to hit your switching target without excessive crossover loss.

Thermal and power dissipation

Power dissipation is rated 3.1 W at 25°C ambient (still air) and 110 W at 25°C case temperature. The wide gap tells you this part lives or dies by its thermal interface — the D2PAK tab must be soldered to a sufficient copper area, ideally with thermal vias to inner layers. For a 23 A load, the 117 mΩ Rds(on) produces about 38 W conduction loss at full current; that's within the case-rated 110 W but demands serious heatsinking. In practice, derate for ambient temperature and switching losses.

RoHS compliance is indicated by the 'PBF' suffix (lead-free).

Frequently asked questions

Is IRF9540NSPBF the same as IRF9540N?

The IRF9540NSPBF is the lead-free (RoHS-compliant) version of the IRF9540N. The electrical specifications — 100 V Vdss, 23 A Id, 117 mΩ Rds(on) — are identical. The 'PBF' suffix denotes Pb-free plating. If your assembly process requires lead-free solder, use the NSPBF variant.

What are the alternatives for IRF9540NSPBF?

Within the same HEXFET family, the IRF9540N (through-hole TO-220AB) is the pin-compatible through-hole alternative. The IRF9540NPBF is the TO-220AB lead-free version. For surface-mount, the IRF9540NSPBF is the D2PAK option; the IRF9540NSTRLPBF is the tape-and-reel variant of the same die. All share the same 100 V / 23 A / 117 mΩ ratings.