Spellman High-Voltage Electronics · Electronic Components
B3990
Transformer, Pulse
Part NumberB3990
ManufacturerSpellman High-Voltage Electronics
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-01-072-9924 (NSN)
Federal Item NameTRANSFORMER,PULSE
Federal Supply Class5950 — Coils and Transformers
Terminal Type And Quantity7 STANDOFF, THREADED STUD
Mounting MethodUNTHREADED HOLE(S) SINGLE GROUP
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Winding Operating Current3.1 AMPERES DC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Inclosure TypeFULLY INCLOSED
Winding Function And Quantity2 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Overall Height7.500 INCHES NOMINAL
Center To Center Distance Between6.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Mounting Facility Quantity4 SINGLE GROUP
Winding Shielding MethodCORE GROUNDED SINGLE COMPONENT
Mounting Hole Diameter0.312 INCHES NOMINAL SINGLE GROUP
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 B3990 available?
We can source B3990 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 B3990 by Spellman High-Voltage Electronics obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If B3990 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 B3990?
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 B3990?
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.