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Infineon Technologies AUIRFS8403TRR — Discrete Semiconductors
Infineon Technologies

AUIRFS8403TRR MOSFET N-CH 40V 123A D2PAK, AEC-Q101, Active

MPNAUIRFS8403TRR
Active

Infineon AUIRFS8403TRR, Automotive AEC-Q101 HEXFET®, N-Channel MOSFET, 40 V, 123 A, 3.3 mOhm Rds(on) @ 70 A, 10 V, 93 nC gate charge, D2PAK (TO-263), -55°C to 175°C junction.

$1.33Ref. price · indicative, final on quote
AUIRFS8403TRR datasheet
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MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
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Specifications

AUIRFS8403TRR Technical Specifications
ParameterValue
SeriesAutomotive, AEC-Q101, HEXFET®
FET typeN-Channel
Mounting_typeSurface Mount
Operating temperature high-55°C to 175°C(TJ)
Vgs±20 V
Power_w99.0
Package_typeBulk
Capacitance_uf0.0032
Product_statusActive
Supply_voltage_v40.0
Vgs(Th) (Max) @ id3.9 V @ 100µA
Switching_current_a123.0
Rds on (Max) @ id, vgs3.3mOhm @ 70 A, 10 V
Gate charge (Qg) (Max) @ vgs93 nC @ 10 V

Product details

Gate charge and switching — 93 nC at 10 V

Total gate charge is 93 nC at 10 V. That is a moderate figure for a 40 V die in D2PAK — not a high-speed switching part, but adequate for PWM in the tens of kHz range. The gate driver must source that charge fast enough to keep switching losses in check; a weak driver will stretch the Miller plateau and burn extra dissipation in the transition edge.

Lifecycle and sourcing reality

The AUIRFS8403TRR is listed as Active — no EOL notice, no last-time-buy clock. That means it can be specified into new designs without an obsolescence risk.

Frequently asked questions

What is the Rds(on) of AUIRFS8403TRR?

The maximum on-resistance is 3.3 mOhm at 70 A drain current with a 10 V gate drive. That is the conduction-loss number for heatsink and PCB copper sizing.

What is the gate charge of AUIRFS8403TRR?

This drives the gate driver requirement — a driver that can source that charge fast enough keeps switching losses manageable in the tens-of-kHz range.

Can AUIRFS8403TRR replace IRFS8403TRR?

The AUIRFS8403TRR is the automotive-qualified (AEC-Q101) version of the IRFS8403TRR. Electrically they share the same 40 V, 123 A, 3.3 mOhm ratings and D2PAK footprint. The AUIRFS8403TRR adds the automotive stress-test qualification, so it is the drop-in replacement for designs that need automotive grade.