STMicroelectronics · Electronic Components
BU508A
TRANSISTOR NPN 700V 8A TO-247
Part NumberBU508A
ManufacturerSTMicroelectronics
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-293-9211 (NSN)
Federal Item NameTRANSISTOR
MaterialPLASTIC ENCLOSURE
Current Rating4.50 AMPERES NOMINAL COLLECTOR CURRENT, INSTANTANEOUS
Terminals3 UNINSULATED WIRE LEAD
Mounting MethodTERMINAL
Overall Length0.796 INCHES MINIMUM AND 0.860 INCHES MAXIMUM
Overall Width0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM
Overall Height0.165 INCHES MINIMUM AND 0.200 INCHES MAXIMUM
Special FeaturesJUNCTION PATTERN ARRANGEMENT: NPN
Power Rating Per Characteristic125.0 WATTS MAXIMUM TOTAL DEVICE DISSIPATION
Terminal Length0.500 INCHES MINIMUM AND 0.610 INCHES MAXIMUM
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 BU508A available?
We can source BU508A 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 BU508A by STMicroelectronics obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If BU508A 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 BU508A?
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 BU508A?
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.