Staco Energy Products Co · Electronic Components
1220B-3
Transformer, Power
Part Number1220B-3
ManufacturerStaco Energy Products Co
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-01-140-1246 (NSN)
Federal Item NameTRANSFORMER,POWER
Federal Supply Class5950 — Coils and Transformers
Input Output Phase RelationshipTHREE PHASE TO THREE PHASE SINGLE COMPONENT
Overall Height6.125 INCHES NOMINAL
Transformer Winding Connection TypWYE-WYE
Winding Operating Current5.0 AMPERES AC MINIMUM SINGLE COMPONENT ALL PRIMARY
Maximum Transformer Power Rating4.2 KILOVOLT-AMPERE SINGLE COMPONENT
Center To Center Distance Between9.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Overall Width6.000 INCHES NOMINAL
Inclosure TypeOPEN
Mounting Slot Width0.255 INCHES NOMINAL SINGLE GROUP
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Adjustment Device Drive TypeSHAFT SINGLE COMPONENT
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 1220B-3 available?
We can source 1220B-3 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 1220B-3 by Staco Energy Products Co obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 1220B-3 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 1220B-3?
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 1220B-3?
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.