SEMELAB · Electronic Components
BD647
DARLINGTON TRANSISTOR, NPN, 80V, TO-220
Part NumberBD647
ManufacturerSEMELAB
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-261-4377 (NSN)
Federal Item NameTRANSISTOR
MaterialPLASTIC ENCLOSURE
Current Rating150.00 MILLIAMPERES MAXIMUM BASE CURRENT, DC
Terminals3 PRINTED CIRCUIT
Mounting MethodTERMINAL
Overall Length1.060 INCHES MINIMUM AND 1.230 INCHES MAXIMUM
Overall Width0.380 INCHES MINIMUM AND 0.420 INCHES MAXIMUM
Overall Height0.140 INCHES MINIMUM AND 0.190 INCHES MAXIMUM
Special FeaturesJUNCTION PATTERN ARRANGEMENT: NPN
Maximum Operating Temp Per Measure165.0 CELSIUS JUNCTION
Voltage Rating In Volts Per Charac100.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN
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 BD647 available?
We can source BD647 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 BD647 by SEMELAB obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If BD647 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 BD647?
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 BD647?
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.