Varian Associates Inc. Communications Transistor Div · Electronic Components
D20-28B
TRANSISTOR — NSN 5961-01-033-2330
Part NumberD20-28B
ManufacturerVarian Associates Inc. Communications Transistor Div
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-033-2330 (NSN)
Federal Item NameTRANSISTOR
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
MaterialCERAMIC ENCLOSURE
Current Rating2.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
Terminals4 FERRULE
Mounting MethodTHREADED STUD(S)
Overall Length0.280 INCHES MAXIMUM
Overall Width0.300 INCHES MAXIMUM
Voltage Rating In Volts Per Charac50.0 NOMINAL BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, WITH BASE SHORT-CIRCUITED TO EMITTER
Special FeaturesJUNCTION PATTERN ARRANGEMENT: NPN
Mounting Facility Quantity1
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 D20-28B available?
We can source D20-28B 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 D20-28B by Varian Associates Inc. Communications Transistor Div obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If D20-28B 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 D20-28B?
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 D20-28B?
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.