Staco Energy Products Co · Electronic Components
520BU
Transformer, Power Autotransforme
Part Number520BU
ManufacturerStaco Energy Products Co
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-539-6962 (NSN)
Federal Item NameTRANSFORMER,POWER AUTOTRANSFORME
Federal Supply Class5950 — Coils and Transformers
Mounting Facility Quantity3 SINGLE GROUP
Frequency Rating50.0 HERTZ NOMINAL OR 60.0 HERTZ NOMINAL SINGLE COMPONENT
Body Width5.094 INCHES NOMINAL
Reliability IndicatorNOT ESTABLISHED
Mounting Hole Diameter0.296 INCHES NOMINAL SINGLE GROUP
Winding Operating Voltage0.00 AC VOLTS MINIMUM AND 270.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Mounting Bolt Circle Diameter5.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Winding Function And Quantity1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
Winding Operating Current3.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Body Length5.000 INCHES MAXIMUM
Mounting MethodUNTHREADED HOLE(S) 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 520BU available?
We can source 520BU 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 520BU by Staco Energy Products Co obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 520BU 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 520BU?
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 520BU?
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.