All Alternatives

Alternatives to onsemi MMBT3904

onsemi MMBT3904 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 onsemi MMBT3904

MMBT3904 compared against its qualified second sources
MMBT3904onsemiMMBT3904LT1GonsemiMMBT3904-7-FDiodes Incorporated+4more
FFF CompatibilityIdentical SOT-23 footprint and standard pin configuration (1-Base, 2-Emitter, 3-Collector) as the original part.Perfectly matches the package dimensions and surface-mount package style.Meets or exceeds all electrical parameters including 40 V breakdown voltage, 200 mA collector current, and 300 MHz transition frequency.Standard SOT-23 footprint and matching JEDEC 3-pin configuration.Interchangeable standard SOT-23 package body style and physical lead pitch.All critical specifications such as breakdown voltage, collector current, and gain match or exceed the original part.
AI Summary

MMBT3904 by onsemi: Bipolar (BJT) Transistor NPN 40 V 200 mA 300MHz 200 mW Surface Mount SOT-23.

This is the premier active replacement from onsemi. It is widely stocked and provides a slightly higher power dissipation rating, making it an excellent, long-lived choice for obsolete Good-Ark designs.

  • True drop-in replacement with exact matching pinout (Pin 1: Base, Pin 2: Emitter, Pin 3: Collector)
  • Active and highly available standard part from a premium tier-1 manufacturer
  • Upgraded power dissipation rating of 300 mW compared to Good-Ark's 200 mW rating

Diodes Incorporated offers an active, industry-standard MMBT3904 variant that seamlessly drops onto existing SOT-23 footprints. This part is a highly reliable direct second-source.

  • True drop-in replacement with exact pin-to-pin alignment
  • Widely stocked and actively maintained component product line
  • Higher power dissipation ceiling of 300 mW vs the original 200 mW
Lifecycle StatusObsoleteActiveActive
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Related parts

PartMarket availabilityLifecycleAlternatives available
MMBT3904LT1onsemiDiscontinuedObsolete5Alternatives availableSee Alternatives
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MMBD914onsemiDiscontinuedObsolete6Alternatives availableSee Alternatives
MBT3904DW1T1GonsemiIn stockActive5Alternatives availableSee Alternatives

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Frequently asked questions

Yes. The onsemi MMBT3904 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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