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1N749A-1 — Axial diode package (representative)
Axial diode
Representative of package type
Microsemi

1N749A-1

Zener Diode · DO-35 · Discrete Semiconductor
Part Status: Obsolete In demand
Data last refreshed Jun 10, 2026
Manufacturer
Microsemi
Mfr Part #
1N749A-1
Series
1N7xxA
Category
Zener Diode
Datasheet
View datasheet ↗
Availability & Pricing
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Sourcing channels4
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Product Attributes

Electrical & Parametric
Vz4.3 V
Power500 mW
Physical & Thermal
Package / CaseDO-35
Mounting TypeThrough Hole
Series1N7xxA
Classification & Lifecycle
CategoryZener Diode
TypeDiscrete Semiconductor
Part StatusObsolete

4.3 V, 500 mW Zener diode, DO-35 glass package

Availability & Sourcing

4 sources
SourceMfrQtyDate CodeConditionStatus
Market MICRO 200 — — Available RFQ
Market CALL 6 — — Available RFQ
Market MOTOROLA 5 85+ — Available RFQ
Market MS 3737 — — Available RFQ

ZDI Stock — in our warehouse · Market — offers available through our sourcing network · Live — recent offers from our sourcing network.

Part Activity

recent searches, RFQs & offers
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1N749A-1 viewed on the web · Web User
1N749A-1 viewed on the web · Web User
1N749A-1 viewed on the web · Web User
1N749A-1 viewed on the web · Web User
1N749A-1 viewed on the web · Web User
1N749A-1 viewed on the web · Web User
1N749A-1 viewed on the web · Web User

Recent search and sourcing activity for 1N749A-1.

Engineering FAQ

1N749A-1 is marked Obsolete — how does ZDI assure authenticity?
Obsolete and end-of-life parts carry elevated counterfeit risk, which is exactly why ZDI routes every lot through the full EQuality Process™ — validation, QI-1 and QI-2/camera inspection, RoHS verification, bake and bag-and-tag, and QI-3 final inspection — with source-country supplier vetting and full lot traceability before release.
What are the key specifications of 1N749A-1?
Vz: 4.3 V; Power: 500 mW.
What package is 1N749A-1 supplied in?
1N749A-1 is supplied in the DO-35 package, through hole.
Can ZDI source 1N749A-1 beyond the quantities shown?
Yes — ZD Integrated Circuits specializes in sourcing hard-to-find, obsolete, and excess electronic components through its global network, with counterfeit-avoidance inspection on every lot. Submit an RFQ with your target quantity for availability and pricing.

Documents & Media

Quality & Counterfeit Avoidance

ISO 9001 ERAI Member ESD Certified GIDEP Participant ZDI EQuality Process CAGE Code 1V8K2

ZD Integrated Circuits operates an ISO 9001-certified quality system incorporating JEDEC-standard process-control elements. In an era of global sourcing and internet procurement, standards compliance alone no longer assures component authenticity — so ZDI pioneered a multi-layered counterfeit-avoidance program: supplier analysis at the source-country level, detailed component analysis, defined inspection standards for all incoming devices, and stringent supplier rating and review. These programs let ZDI guarantee the integrity and the source of every component it ships.

Every lot moves through ZDI's EQuality Process™ — validation, QI-1 and QI-2/camera inspection, RoHS verification, bake and bag-and-tag, and QI-3 final inspection — with Quality-Manager disposition before release. Nonconforming material is quarantined; conforming material is warehoused or shipped.

✓Multi-stage EQuality Process™ inspection (QI-1 · QI-2/camera · QI-3)
✓Source-country supplier analysis, rating & review
✓Incoming inspection, RoHS verification, bake, full lot traceability
✓ESD-controlled handling · authentic parts guaranteed

1N749A-1 is marked Obsolete. Obsolete and end-of-life parts carry elevated counterfeit risk — exactly why ZDI routes them through the full EQuality Process™ with source-country supplier vetting, inspection, and traceability.

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