Espey Mfg and Electronics · Electronic Components
SI-33-A
Transformer, Audio Frequency
Part NumberSI-33-A
ManufacturerEspey Mfg and Electronics
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-919-1327 (NSN)
Federal Item NameTRANSFORMER,AUDIO FREQUENCY
Federal Supply Class5950 — Coils and Transformers
Winding Function And Quantity1 PRIMARY AND 11 SECONDARY SINGLE COMPONENT
Frequency Rating300.0 HERTZ MINIMUM AND 10.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Terminal Type And Quantity24 SOLDER STUD
Body Width2.719 INCHES NOMINAL
Center To Center Distance Between1.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Nominal Thread Size0.138 INCHES SINGLE GROUP
Mounting Facility Quantity4 SINGLE GROUP
Body Length2.781 INCHES NOMINAL
Body Height2.344 INCHES NOMINAL
Vendor Part NumbersSI33A2146M
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 SI-33-A available?
We can source SI-33-A 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 SI-33-A by Espey Mfg and Electronics obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SI-33-A 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 SI-33-A?
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 SI-33-A?
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.