PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

28704Transformer,power

Dar Electronics Inc Dba National Radio Co · NSN 5950-00-688-5851 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-688-5851 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-688-5851. Primary manufacturer part number: 28704.
Features
  • Transformer,power — FSC 5950
  • Body Width: 4.250 INCHES MINIMUM AND 4.313 INCHES MAXIMUM IN
  • Winding Operating Current: UNABLE TO DECODE5.0 AMPERES AC NOMINAL SINGLE COMPONENT FOURTH SECONDARY
  • Winding Power Rating: UNABLE TO DECODE56.6 VOLTS-AMPERES SINGLE COMPONENT FIRST SECONDARY
  • Winding Power Rating: UNABLE TO DECODE31.5 VOLTS-AMPERES SINGLE COMPONENT FOURTH SECONDARY
  • Mounting Method: THREADED HOLE(S) SINGLE GROUPUNABLE TO DECODE
  • Winding Power Rating: UNABLE TO DECODE46.5 VOLTS-AMPERES SINGLE COMPONENT THIRD SECONDARY
  • Winding Shielding Method: INTERNAL SHIELD GROUNDED TO CORE SINGLE COMPONENTUNABLE TO DECODE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-688-5851, is classified within Federal Supply Class 5950 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Dar Electronics Inc Dba National Radio Co. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-688-5851
Primary Part Number28704
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerDar Electronics Inc Dba National Radio Co
StatusACTIVE
Body Width4.250 INCHES MINIMUM AND 4.313 INCHES MAXIMUM IN
Winding Operating CurrentUNABLE TO DECODE5.0 AMPERES AC NOMINAL SINGLE COMPONENT FOURTH SECONDARY
Winding Power RatingUNABLE TO DECODE56.6 VOLTS-AMPERES SINGLE COMPONENT FIRST SECONDARY
Winding Power RatingUNABLE TO DECODE31.5 VOLTS-AMPERES SINGLE COMPONENT FOURTH SECONDARY
Mounting MethodTHREADED HOLE(S) SINGLE GROUPUNABLE TO DECODE
Winding Power RatingUNABLE TO DECODE46.5 VOLTS-AMPERES SINGLE COMPONENT THIRD SECONDARY
Winding Shielding MethodINTERNAL SHIELD GROUNDED TO CORE SINGLE COMPONENTUNABLE TO DECODE
Nominal Thread Size0.190 INCHES SINGLE GROUPUNABLE TO DECODE IN
Winding Power RatingUNABLE TO DECODE7.98 VOLTS-AMPERES SINGLE COMPONENT SECOND SECONDARY
Reliability IndicatorNOT ESTABLISHED
Winding Operating CurrentUNABLE TO DECODE5.0 AMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
Winding Operating CurrentUNABLE TO DECODE600.0 MILLIAMPERES AC NOMINAL SINGLE COMPONENT SECOND SECONDARY
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENTUNABLE TO DECODE
Mounting Facility Quantity4 SINGLE GROUPUNABLE TO DECODE
Winding Operating CurrentUNABLE TO DECODE267.0 MILLIAMPERES AC NOMINAL SINGLE COMPONENT FIRST SECONDARY
Winding Operating VoltageUNABLE TO DECODE212.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Winding Operating Voltage13.30 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Body Height3.625 INCHES MINIMUM AND 3.688 INCHES MAXIMUM IN
Inclosure TypeHERMETICALLY SEALED
Winding Operating Voltage3.15 AC VOLTS NOMINAL AND 6.30 AC VOLTS NOMINAL AND 9.30 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Winding Operating VoltageUNABLE TO DECODE
Winding Operating Voltage6.30 AC VOLTS NOMINAL SINGLE COMPONENT FOURTH SECONDARY
Body Length4.437 INCHES MINIMUM AND 4.500 INCHES MAXIMUM IN
Winding Operating Voltage100.00 AC VOLTS NOMINAL AND 110.00 AC VOLTS NOMINAL AND 120.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Thread Series DesignatorUNF SINGLE GROUP
Winding Operating VoltageUNABLE TO DECODE
Maximum Operating Temp105.0 CELSIUS DEGC
Terminal Type and Quantity15 TAB, SOLDER LUG
Thread Series DesignatorUNABLE TO DECODE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
2805-00-147-3739KF19A INTERCHANGEABLE
Cap,push Rod
Wisconsin Motors, Llc
5330-00-366-6253QD614 INTERCHANGEABLE
Gasket
Wisconsin Motors, Llc
4330-00-844-5933 INTERCHANGEABLE
Filter,fluid
6550-01-626-562628704 INTERCHANGEABLE
Test Kit,dna Analysis
Qiagen, Llc
5330-01-732-301628704 INTERCHANGEABLE
Gasket
Industrial Technologies and Services Llc
Cross-Reference Index
Part NumberManufacturer
28704 Dar Electronics Inc Dba National Radio Co (USA)
28704ISSUEB Dar Electronics Inc Dba National Radio Co (USA)
Related Parts
2805-00-147-3739INTERCHANGEABLE
CAP,PUSH ROD
KF19A
5330-00-366-6253INTERCHANGEABLE
GASKET
QD614
4330-00-844-5933INTERCHANGEABLE
FILTER,FLUID
6550-01-626-5626INTERCHANGEABLE
TEST KIT,DNA ANALYSIS
28704
5330-01-732-3016INTERCHANGEABLE
GASKET
28704

Frequently Asked Questions

What is NSN 5950-00-688-5851?

NSN 5950-00-688-5851 is a Transformer,power, manufactured by Dar Electronics Inc Dba National Radio Co, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-688-5851?

NSN 5950-00-688-5851 has 2 cross-referenced part numbers: 28704 (Dar Electronics Inc Dba National Radio Co), 28704ISSUEB (Dar Electronics Inc Dba National Radio Co).

What NSN replaces 5950-00-688-5851?

There are 5 known substitutes for 5950-00-688-5851: 2805-00-147-3739, 5330-00-366-6253, 4330-00-844-5933 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 28704?

Key specifications for 28704: Body Width: 4.250 INCHES MINIMUM AND 4.313 INCHES MAXIMUM IN; Winding Operating Current: UNABLE TO DECODE5.0 AMPERES AC NOMINAL SINGLE COMPONENT FOURTH SECONDARY; Winding Power Rating: UNABLE TO DECODE56.6 VOLTS-AMPERES SINGLE COMPONENT FIRST SECONDARY; Winding Power Rating: UNABLE TO DECODE31.5 VOLTS-AMPERES SINGLE COMPONENT FOURTH SECONDARY. 29 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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