Ballantine Laboratories · Electronic Components
3056
Transformer, Power
Part Number3056
ManufacturerBallantine Laboratories
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-133-2922 (NSN)
Federal Item NameTRANSFORMER,POWER
Federal Supply Class5950 — Coils and Transformers
Winding Operating Current1.2 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Overall Length3.625 INCHES NOMINAL
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT ALL PRIMARY
Winding Function And Quantity2 PRIMARY AND 4 SECONDARY SINGLE COMPONENT
Winding Shielding MethodCORE GROUNDED AND BROUGHT OUT TO TERMINAL AND INTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT
Overall Width2.875 INCHES NOMINAL
Terminal Type And Quantity15 WIRE LEAD
Mounting Slot Width0.188 INCHES NOMINAL SINGLE GROUP
Inclosure TypePARTIALLY INCLOSED, DOUBLE SHELL
Overall Height3.562 INCHES NOMINAL
Center To Center Distance Between2.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Vendor Part NumbersMB1388D
Actuator Position Action RelationsUP POSITION MOMENTARY AND DOWN POSITION MAINTAINED
ColorBROWN SINGLE ACTUATOR
Precious Material And LocationCONTACTS SILVER
Nonpile Up Contact Arrangement2 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION SINGLE SWITCH UNIT
Maximum Voltage Rating In Volts250.0 AC
Contact Load Current Rating At Max3.000 AMPERES RESISTIVE AC
Actuator StyleRECTANGULAR
Body StylePANEL MOUNT
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 3056 available?
We can source 3056 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 3056 by Ballantine Laboratories obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 3056 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 3056?
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 3056?
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.