All Alternatives

Alternatives to STMicroelectronics BUX10

STMicroelectronics BUX10 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

Equivalent and substitute parts for STMicroelectronics BUX10

BUX10 compared against its qualified second sources
BUX10STMicroelectronicsMJ15003GonsemiMJ15024Gonsemi+3more
FFF CompatibilitySame physical TO-204AA (TO-3) chassis mount package with exact same pinout (Pin 1: Base, Pin 2: Emitter, Case: Collector).Standard metal can TO-3 case dimensions match the original footprint precisely.The maximum collector current is slightly lower (20 A vs 25 A) and the transition frequency is lower (2 MHz vs 8 MHz).Shares the identical TO-3 metal can footprint with Pin 1 as Base, Pin 2 as Emitter, and Case as Collector.Matches standard TO-204AA / TO-3 dimensions.Maximum collector current is 16 A vs the original 25 A, and transition frequency is 4 MHz vs 8 MHz.
AI Summary

BUX10 by STMicroelectronics: Bipolar (BJT) Transistor NPN 125 V 25 A 8MHz 150 W Chassis Mount TO-3.

This active power NPN transistor is the leading industry replacement for the obsolete BUX10, offering a matching TO-3 package with excellent thermal performance. It safely exceeds the breakdown voltage and power limits of the original, but carries a slightly lower collector current rating of 20 A.

  • True drop-in replacement in TO-204AA / TO-3 package
  • Higher collector-emitter breakdown voltage: 140 V vs 125 V
  • Higher power dissipation: 250 W vs 150 W
  • Slightly lower maximum collector current: 20 A vs 25 A
  • Lower transition frequency: 2 MHz vs 8 MHz

With a massive 250 V breakdown voltage rating, the MJ15024G provides a substantial safety margin for voltage spikes. It is an excellent fit for high-voltage linear applications, though collector current is limited to 16 A.

  • Significantly higher breakdown voltage: 250 V vs 125 V
  • Higher maximum power dissipation: 250 W vs 150 W
  • Standard active product with excellent long-term availability
  • Lower continuous collector current: 16 A vs 25 A
  • Lower transition frequency: 4 MHz vs 8 MHz
Lifecycle StatusObsoleteActiveActive
Market AvailabilityDiscontinuedIn stockIn stock
REACHREACHUnknownREACH
RoHSRoHSRoHSRoHS
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Related parts

PartMarket availabilityLifecycleAlternatives available
BUT30VSTMicroelectronicsNon-stockObsolete3Alternatives availableSee Alternatives

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Frequently asked questions

Yes. The STMicroelectronics BUX10 is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.

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