Fairchild Semiconductor · Electronic Components
BU406
TRANSISTOR NPN 200V 7A TO-220
Part NumberBU406
ManufacturerFairchild Semiconductor
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-214-8424 (NSN)
Federal Item NameTRANSISTOR
Current Rating7.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
Terminals3 UNINSULATED WIRE LEAD
Mounting MethodTERMINAL
Overall Length0.550 INCHES MINIMUM AND 0.650 INCHES MAXIMUM
Overall Width0.380 INCHES MINIMUM AND 0.420 INCHES MAXIMUM
Overall Height0.140 INCHES MINIMUM AND 0.190 INCHES MAXIMUM
Features ProvidedHERMETICALLY SEALED CASE
Special FeaturesJUNCTION PATTERN ARRANGEMENT: NPN
Joint Electronic Device EngineerinTO-220AB
Voltage Rating In Volts Per Charac400.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 200.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE O
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
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 BU406 available?
We can source BU406 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 BU406 by Fairchild Semiconductor obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If BU406 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 BU406?
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 BU406?
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.