Skip to main content
Infineon Technologies IRFB4020PBF

IRFB4020PBF N-Channel MOSFET, 200V 18A TO-220AB

MPNIRFB4020PBF
End of Life

Infineon IRFB4020PBF, N-Channel MOSFET, 200 Vdss, 18 A continuous, 100 mOhm Rds(on) at 10 V, TO-220AB, -55 to 175 °C.

$1.79Ref. price · indicative, final on quote
PackagingTO-220-3
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

IRFB4020PBF specifications
ParameterValue
FET typeN-Channel
MountingThrough Hole
Drain to source voltage200 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C18A (Tc)
Power dissipation100W (Tc)
Operating temperature-55°C ~ 175°C (TJ)
PackageTube
Vgs±20V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3
Vgs(th) (Max) @ id4.9V @ 100µA
Rds on (Max) @ id, vgs100mOhm @ 11A, 10V
Gate charge (Qg) (Max) @ vgs29 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1200 pF @ 50 V

Product details

200 V drain, 18 A continuous — headroom for a 48 V bus

That 200 V rating gives you a solid 4× margin on a 48 V motor drive bus — the kind of headroom that keeps the part alive during regeneration spikes or a stalled motor.

100 mOhm on-resistance — the conduction-loss number

At 11 A the conduction loss is about 12 W, which is well within the 100 W package limit at the case if you bolt it to a decent heatsink.

Through-hole TO-220 — field-swappable, no hot air needed

The TO-220AB through-hole package is a field-service favourite. You can swap it with a soldering iron and a desoldering pump — no hot-air station, no preheater. The tab is the drain, so orientation is obvious once the part is in your hand.

Active lifecycle, ROHS3 — no obsolescence clock

No last-time-buy notice, no end-of-life date on the horizon.

Frequently asked questions

What is the datasheet for IRFB4020PBF?

Buyers need to validate electrical specs and pinout before design-in.

Is IRFB4020PBF in stock?

Immediate availability determines whether a buyer can proceed with a purchase.

What is the price of IRFB4020PBF?

Pricing directly influences the buyer's budget decision and supplier selection.

What is the equivalent part for IRFB4020PBF?

Engineers and buyers need cross-reference options for second-source or replacement.

Where can I buy IRFB4020PBF?

Locating an authorized distributor is critical for genuine parts and warranty.

Is IRFB4020PBF RoHS compliant?

Compliance to environmental regulations is mandatory for many manufacturing lines.