Solitron Devices · Electronic Components
SDT4921
TRANSISTOR — NSN 5961-01-228-4871
Part NumberSDT4921
ManufacturerSolitron Devices
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-228-4871 (NSN)
Federal Item NameTRANSISTOR
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
Terminals3 UNINSULATED WIRE LEAD
Mounting MethodTERMINAL
Overall Length0.250 INCHES NOMINAL
Overall Diameter0.352 INCHES NOMINAL
Special FeaturesJUNCTION PATTERN ARRANGEMENT: NPN
Semiconductor MaterialSILICON
Joint Electronic Device EngineerinTO-5
Terminal Length1.501 INCHES NOMINAL
Voltage Rating In Volts Per Charac225.0 NOMINAL COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 200.0 NOMINAL COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE O
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 SDT4921 available?
We can source SDT4921 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 SDT4921 by Solitron Devices obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SDT4921 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 SDT4921?
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 SDT4921?
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.