PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

704AS9821Transformer,power

Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier · NSN 5950-01-258-3474 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-258-3474 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-258-3474. Primary manufacturer part number: 704AS9821.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Winding Operating Voltage: 25.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
  • Winding Operating Voltage: 63.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 1.480 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Body Height: 2.125 INCHES MAXIMUM IN
  • Mounting Method: THREADED HOLE(S) SINGLE GROUP
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-01-258-3474, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-01-258-3474
Primary Part Number704AS9821
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerNaval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Winding Operating Voltage25.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Winding Operating Voltage63.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Center to Center Distance Between Mounting Facilities Parallel to Width1.480 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Height2.125 INCHES MAXIMUM IN
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Terminal Type and Quantity8 TAB, SOLDER LUG
Winding Operating Voltage113.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Nominal Thread Size0.164 INCHES SINGLE GROUP IN
Winding Operating Voltage25.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Winding Operating Current2.7 AMPERES DC NOMINAL SINGLE COMPONENT THIRD SECONDARY
Winding Operating Current1.5 AMPERES AC NOMINAL SINGLE COMPONENT FIRST SECONDARY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Maximum Operating Temp155.0 CELSIUS DEGC
Inclosure TypeFULLY INCLOSED
Body Width2.550 INCHES MAXIMUM IN
Winding Shielding MethodINTERNAL SHIELD GROUNDED TO CORE SINGLE COMPONENT
Winding Power Rating94.5 VOLTS-AMPERES SINGLE COMPONENT FIRST SECONDARY
Winding Power Rating67.5 VOLTS-AMPERES SINGLE COMPONENT SECOND SECONDARY
Center to Center Distance Between Mounting Facilities Parallel to Length2.090 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Function and Quantity1 PRIMARY AND 3 SECONDARY SINGLE COMPONENT
Maximum Transformer Power Rating130.0 VOLT-AMPERE SINGLE COMPONENT
Winding Power Rating67.5 VOLTS-AMPERES SINGLE COMPONENT THIRD SECONDARY
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Mounting Facility Quantity4 SINGLE GROUP
Body Length3.050 INCHES MAXIMUM IN
Winding Operating Current2.7 AMPERES DC NOMINAL SINGLE COMPONENT SECOND SECONDARY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5330-01-178-0083662331 INTERCHANGEABLE
Gasket
Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)
5331-01-360-535627771 INTERCHANGEABLE
O-Ring
Bourns Inc
Cross-Reference Index
Part NumberManufacturer
704AS9821 PRIMARY Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
899821-1 Raytheon Company Dba Raytheon (USA)
27771 Torotel, Inc. Div Torotel Products, Inc. (USA)
Related Parts
5330-01-178-0083INTERCHANGEABLE
GASKET
662331
5331-01-360-5356INTERCHANGEABLE
O-RING
27771

Frequently Asked Questions

What is NSN 5950-01-258-3474?

NSN 5950-01-258-3474 is a Transformer,power, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-258-3474?

NSN 5950-01-258-3474 has 3 cross-referenced part numbers: 704AS9821 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 899821-1 (Raytheon Company Dba Raytheon), 27771 (Torotel, Inc. Div Torotel Products, Inc.).

What NSN replaces 5950-01-258-3474?

There are 2 known substitutes for 5950-01-258-3474: 5330-01-178-0083, 5331-01-360-5356. Verify interchangeability with system specifications before substitution.

What are the specifications of 704AS9821?

Key specifications for 704AS9821: Reliability Indicator: NOT ESTABLISHED; Winding Operating Voltage: 25.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY; Winding Operating Voltage: 63.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY; Center to Center Distance Between Mounting Facilities Parallel to Width: 1.480 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN. 28 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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