All Alternatives

Alternatives to onsemi MMBZ5242BLT1

onsemi MMBZ5242BLT1 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 MMBZ5242BLT1

MMBZ5242BLT1 compared against its qualified second sources
MMBZ5242BLT1onsemiMMBZ5242BLT1GonsemiMMBZ5242B-7-FDiodes Incorporated+4more
FFF CompatibilityBoth parts share the identical SOT-23 footprint with the same 3-pin assignment (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode).Both parts are housed in the standard SOT-23 package with identical mechanical dimensions.Exact electrical match with 12V Zener voltage, 5% tolerance, 30 Ohms impedance, and 225 mW power dissipation.Housed in a standard SOT-23 package with matching pin configuration (Pin 1: Anode, Pin 2: NC, Pin 3: Cathode).Standard SMD SOT-23 package, fitting the exact same board land pattern.Electrical properties match or exceed the original, featuring a higher maximum power rating.
AI Summary

MMBZ5242BLT1 by onsemi: Zener Diode 12 V 225 mW ±5% Surface Mount SOT-23-3 (TO-236).

This is the direct manufacturer-recommended lead-free replacement for the obsolete MMBZ5242BLT1. It maintains identical electrical and physical characteristics while conforming to modern environmental RoHS standards.

  • Direct manufacturer replacement from the same series
  • Exact match for all electrical parameters (12V ±5% Zener voltage)
  • Fully RoHS3 compliant and lead-free (G suffix)

This is a highly reliable second-source alternative from Diodes Inc. It offers a higher power rating of 350 mW compared to the original 225 mW, providing additional thermal safety margins in your design.

  • Higher power dissipation rating (350 mW vs 225 mW) for improved thermal headroom
  • Industry-standard second-source replacement from a reliable manufacturer
  • Identical 12V nominal voltage and 5% tolerance
  • Slightly different power rating which is a safe, drop-in improvement
Lifecycle StatusObsoleteActiveActive
Market AvailabilityDiscontinuedIn stockIn stock
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Related parts

PartMarket availabilityLifecycleAlternatives available
MMBZ5242BonsemiNon-stockObsolete5Alternatives availableSee Alternatives
MMSZ5242BonsemiNon-stockObsolete3Alternatives availableSee Alternatives
MMSZ5245BonsemiIn stockObsolete5Alternatives availableSee Alternatives
MMSZ5226BonsemiDiscontinuedObsolete5Alternatives availableSee Alternatives
MMBT2222ALT1onsemiDiscontinuedObsolete4Alternatives availableSee Alternatives
MMBD914LT1onsemiDiscontinuedObsolete8Alternatives availableSee Alternatives

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Frequently asked questions

Yes. The onsemi MMBZ5242BLT1 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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