Magnetika · Electronic Components
ER289
Transformer, Audio Frequency
Part NumberER289
ManufacturerMagnetika
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-781-4011 (NSN)
Federal Item NameTRANSFORMER,AUDIO FREQUENCY
Federal Supply Class5950 — Coils and Transformers
Terminal Type And Quantity5 WIRE LEAD
Mounting MethodTERMINAL SINGLE GROUP
Body Length0.313 INCHES NOMINAL
Body Outside Diameter0.344 INCHES NOMINAL
Maximum Transformer Power Rating100.0 MILLIWATTS SINGLE COMPONENT
Impedance Rating In Ohms10000.0 MINIMUM AND 12000.0 MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Inclosure TypeHERMETICALLY SEALED
Winding Function And Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Transformer FunctionLINE
Vendor Part Numbers1066400
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 ER289 available?
We can source ER289 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 ER289 by Magnetika obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If ER289 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 ER289?
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 ER289?
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.