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AUIRFS8408

AUIRFS8408 N-Channel HEXFET, 40 V, 1.6 mOhm, -55 to 175°C

MPNAUIRFS8408
Active

Infineon AUIRFS8408, automotive N-channel HEXFET MOSFET, 40 V, 195 A switching current, 1.6 mOhm Rds(on) max at 10 V, 324 nC gate charge, -55°C to 175°C junction temperature, surface mount.

$1.29Ref. price · indicative, final on quote
Infineon Technologies AUIRFS8408 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

AUIRFS8408 specifications
ParameterValue
SeriesHEXFET®
FET typeN-Channel
MountingSurface Mount
Operating temperature high-55°C to 175°C(TJ)
Vgs±20 V
Power294.0
Package_typeBulk
Capacitance_uf0.0108
StatusActive
Supply voltage40.0
Vgs(Th) (Max) @ id3.9 V @ 250µA
Switching current195.0
Rds on (Max) @ id, vgs1.6mOhm @ 100 A, 10 V
Gate charge (Qg) (Max) @ vgs324 nC @ 10 V

Product details

40 V N-channel HEXFET for automotive power switching

The AUIRFS8408: It is designed for high-current switching applications such as electric power steering, engine cooling fans, and DC-DC converters in 12 V and 24 V vehicle electrical systems.

On-resistance and gate charge — sizing the driver

The total gate charge of 324 nC at 10 V determines the gate-driver current needed for the target switching frequency — a 324 nC gate switched at 50 kHz draws about 16 mA from the driver, well within the capability of a standard automotive gate-driver IC.

Junction temperature range and automotive qualification

The 175°C TJ max provides headroom for fault conditions like stalled-motor current or short-circuit events before the silicon reaches its absolute limit.

The field lists IRFS8408 as a direct cross-reference, which can simplify dual-sourcing or replacement searches.

Frequently asked questions

Where can I buy AUIRFS8408 in stock?

Buyers need to quickly find a distributor with immediate availability to avoid project delays.

What is the price of AUIRFS8408?

Pricing is critical for BOM cost estimation and budget approval.

Is AUIRFS8408 a direct replacement for IRFS8408?

Engineers need to verify compatibility when substituting parts to avoid redesign.

What is the Rds(on) of AUIRFS8408 at 10V?

Rds(on) determines power loss and thermal performance in switching applications.

What is the lead time for AUIRFS8408?

Long lead times can impact production schedules and require expediting or alternative sourcing.

Does AUIRFS8408 come in tape and reel packaging?

Packaging affects assembly process and cost for automated pick-and-place.