NXP Semiconductors BUK9511-55A,127
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BUK9511-55A,127 N-Channel MOSFET, 55 V, 75 A, TO-220AB

MPN BUK9511-55A,127
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NXP BUK9511-55A,127, Automotive AEC-Q101 TrenchMOS N-channel MOSFET, 55 V Vdss, 75 A Id, 10 mOhm Rds(on) at 25 A, TO-220AB through-hole package, -55 to 175 °C operating temperature.

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[SPEC] Essential Parameters Snapshot Full Specifications (14)
Package / Case TO-220-3
Output / Current 55 V

Full Technical Specifications

14 Parameters
BUK9511-55A,127 specifications
Parameter / AttributeSpecification / Value
SeriesAutomotive, AEC-Q101, TrenchMOS™
FET typeN-Channel
MountingThrough Hole
Drain to source voltage55 V
Current - continuous drain (Id) @ 25°C75A (Ta)
Power dissipation166W (Ta)
Operating temperature-55°C ~ 175°C (TJ)
PackageTube
Vgs±10V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3
Vgs(th) (Max) @ id2V @ 1mA
Rds on (Max) @ id, vgs10mOhm @ 25A, 10V
Input capacitance (Ciss) (Max) @ vds4230 pF @ 25 V
Series Sibling Variants

NXP Semiconductors Automotive, AEC-Q101, TrenchMOS™ Series Models

Sibling variants, package options, and speed/density grades in this NXP Semiconductors semiconductor series. Active Shenzhen warehouse allocation and rapid 24-48h dispatch.

Technical Details & Description

The TO-220AB through-hole package handles up to 166 W dissipation, but the thermal path depends on the heatsink interface — the copper tab solders directly to the board or a clip. The -55 to 175 °C junction range covers under-hood automotive and industrial environments where ambient temperatures push 125 °C.

Switching and drive considerations

The input capacitance is 4230 pF typical at 25 V drain-source. That is moderate for a 75 A device — the gate driver needs to source and sink enough peak current to hit the target switching frequency without excessive crossover loss. The 2 V maximum gate threshold at 1 mA drain current means the device is fully enhanced with logic-level gate drives above 5 V, but the 10 mOhm Rds(on) spec is guaranteed at 10 V only. For lower gate voltages the on-resistance rises — check the typical curve in the datasheet if the gate drive is 5 V.

Frequently asked questions

Is BUK9511-55A,127 AEC-Q101 qualified?

Yes, the BUK9511-55A,127 is part of the Automotive, AEC-Q101, TrenchMOS series, which means it has passed the automotive-grade qualification tests for discrete semiconductors.

What is the Rds(on) of BUK9511-55A?

The maximum Rds(on) is 10 mOhm at 25 A drain current and 10 V gate-source voltage.

What is the maximum continuous drain current of BUK9511-55A?

The continuous drain current is rated at 75 A at 25 °C case temperature.

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