Technical Services Laboratory, Inc. · Electronic Components
B191
Transformer, Power
Part NumberB191
ManufacturerTechnical Services Laboratory, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-949-4105 (NSN)
Federal Item NameTRANSFORMER,POWER
Federal Supply Class5950 — Coils and Transformers
Mounting Slot Width0.156 INCHES NOMINAL SINGLE GROUP
Inclosure TypeHERMETICALLY SEALED
Body Width2.000 INCHES NOMINAL
Winding Function And Quantity2 PRIMARY AND 3 SECONDARY SINGLE COMPONENT
Winding Operating Current1.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
Frequency Rating50.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM SINGLE COMPONENT
Body Length2.000 INCHES NOMINAL
Center To Center Distance Between1.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP
Winding Operating Voltage6.30 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Mounting Facility Quantity4 SINGLE GROUP
Input Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Vendor Part Numbers336-073-003
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 B191 available?
We can source B191 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 B191 by Technical Services Laboratory, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If B191 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 B191?
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 B191?
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.