STMicroelectronics Inc. · Electronic Components
SD1851
TRANSISTOR — NSN 5961-01-377-8543
Part NumberSD1851
ManufacturerSTMicroelectronics Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-377-8543 (NSN)
Federal Item NameTRANSISTOR
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
Criticality Code JustificationFEAT
Semiconductor MaterialSILICON
Special FeaturesWEAPON SYSTEM ESSENTIAL; JUNCTION PATTERN ARRANGEMENT: NPN
Internal ConfigurationJUNCTION CONTACT
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is SD1851 available?
We can source SD1851 even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is SD1851 by STMicroelectronics Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SD1851 has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like SD1851?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for SD1851?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.