NEC America · Electronic Components
V643A
TRANSISTOR — NSN 5961-01-018-1958
Part NumberV643A
ManufacturerNEC America
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-018-1958 (NSN)
Federal Item NameTRANSISTOR
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
Current Rating150.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
Terminals4 RIBBON
Mounting MethodTERMINAL
Overall Length5.6 MILLIMETERS MAXIMUM
Overall Diameter7.5 MILLIMETERS MAXIMUM
Power Rating Per Characteristic3.75 WATTS MAXIMUM TOTAL POWER DISSIPATION
Voltage Rating In Volts Per Charac40.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 20.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPE
Internal ConfigurationJUNCTION CONTACT
Features ProvidedHERMETICALLY SEALED CASE
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 V643A available?
We can source V643A 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 V643A by NEC America obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If V643A 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 V643A?
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 V643A?
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.