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BF550 — SOT-23 (3-lead) package (representative)
SOT-23 (3-lead)
Representative of package type
SIE

BF550

Bipolar Transistor · SOT-23 · Discrete Semiconductor
Part Status: Obsolete In demand
Data last refreshed Jun 20, 2026
Manufacturer
SIE
Mfr Part #
BF550
Category
Bipolar Transistor
Datasheet
View datasheet ↗
Availability & Pricing
ZDI Price$0.15
Last transacted2004-04-02
Market range$0.15
Sourcing channels31
Request a Quote → Check Live Availability

Live pricing on request · most quotes same business day

Specifications

Physical & Thermal
Package / CaseSOT-23
Mounting TypeSurface Mount
Classification & Lifecycle
CategoryBipolar Transistor
TypeDiscrete Semiconductor
Part StatusObsolete

PNP silicon RF transistor, VHF/UHF

Availability & Sourcing

31 sources
SourceMfrQtyDate CodeConditionStatus
Live SIE 3000 — — Live RFQ
Live Nexperia 174000 — — Live RFQ
Live NEXPERIA 75035 25+ — Live RFQ
Live NEXPERIA 60005 21+ — Live RFQ
Live PHI 14793 — — Live RFQ
Live NXP Semiconductors 10509 — — Live RFQ
Live NXP 6000 0430/044 — Live RFQ
Live PHILIPS 5577 04+ — Live RFQ
Live Philips 3000 9905 — Live RFQ
Live PHI 1818 0314 — Live RFQ
Live NXP 1235 0742DC — Live RFQ
Live NEXPER 939 — — Live RFQ
Live 7900 215 — — Live RFQ
Live NEXPERIA 18000 25+ — Live RFQ
Live PHILIPS 3000 521 — Live RFQ
Live Nexperia 2619000 26+ — Live RFQ
Market SIE 3000 — — Available RFQ
Market Nexperia 174000 — — Available RFQ
Market NEXPERIA 75035 25+ — Available RFQ
Market NEXPERIA 60005 21+ — Available RFQ
Market PHI 14793 — — Available RFQ
Market NXP Semiconduct 10509 — — Available RFQ
Market NXP 6000 0430/044 — Available RFQ
Market PHILIPS 5577 04+ — Available RFQ
Market Philips 3000 9905 — Available RFQ
Market PHI 1818 0314 — Available RFQ
Market NXP 1235 0742DC — Available RFQ
Market NEXPER 939 — — Available RFQ
Market 7900 215 — — Available RFQ
Market NEXPERIA 18000 25+ — Available RFQ
Market Nexperia 2619000 26+ — Available RFQ

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

Price History & Market Reference

Market Price Range

High$0.15
Low$0.15
Last$0.15
Price as of2004-04-02

ZDI Transaction

Last ZDI price$0.15
As of2004-04-02
Active offers31

Pricing reflects ZDI's transaction and market-reference data. Firm pricing confirmed per RFQ against current availability.

Part Activity

recent searches, RFQs & offers
BF550 viewed on the web · Web User
BF550 viewed on the web · Web User
BF550 viewed on the web · Web User
BF550 viewed on the web · Web User
BF550 viewed on the web · Web User
BF550 viewed on the web · Web User
BF550 viewed on the web · Web User
BF550 searched via the web · Web User

Recent search and sourcing activity for BF550.

Engineering FAQ

BF550 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 package is BF550 supplied in?
BF550 is supplied in the SOT-23 package, surface mount.
Can ZDI source BF550 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

BF550 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.

Related Parts

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