PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3391Transformer,power

Precision Electronics, Inc · NSN 5950-00-648-6777 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-648-6777 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-648-6777. Primary manufacturer part number: 3391.
Features
  • Transformer,power — FSC 5950
  • Frequency Rating: 380.0 HERTZ MINIMUM AND 1.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
  • Reliability Indicator: NOT ESTABLISHED
  • Winding Operating Current: 70.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
  • Nominal Thread Size: 0.164 INCHES SINGLE GROUP IN
  • Winding Shielding Method: INTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT
  • Winding Operating Current: 170.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
  • Body Height: 2.875 INCHES MAXIMUM IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-648-6777, 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 Precision Electronics, Inc. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-648-6777
Primary Part Number3391
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerPrecision Electronics, Inc
StatusACTIVE
Frequency Rating380.0 HERTZ MINIMUM AND 1.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Winding Operating Current70.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Nominal Thread Size0.164 INCHES SINGLE GROUP IN
Winding Shielding MethodINTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT
Winding Operating Current170.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Body Height2.875 INCHES MAXIMUM IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Thread Quantity Per Inch32 SINGLE GROUP
Maximum Operating Temp125.0 CELSIUS DEGC
Winding Operating Voltage105.00 AC VOLTS NOMINAL AND 110.00 AC VOLTS NOMINAL AND 115.00 AC VOLTS NOMINAL AND 120.00 AC VOLTS NOMINAL AND 125.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Center to Center Distance Between Mounting Facilities Parallel to Length2.375 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Center to Center Distance Between Mounting Facilities Parallel to Width2.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting Facility Quantity4 SINGLE GROUP
Terminal Type and Quantity12 TAB, SOLDER LUG
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Inclosure TypeOPEN
Winding Operating Voltage24.00 AC VOLTS NOMINAL AND 3.15 AC KILOVOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Winding Function and Quantity1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
Body Length3.688 INCHES MAXIMUM IN
Body Width3.156 INCHES MAXIMUM IN
Winding Operating Voltage24.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5985-00-111-3503GT817U1 INTERCHANGEABLE
Dummy Load,electrical
Northrop Grumman Systems Corporation
4730-00-196-2059A733S-121CFB INTERCHANGEABLE
Nipple,pipe
American Society for Testing and Materials Dba Astm International
5310-00-252-54983391 INTERCHANGEABLE
Nut,plain,single Ball Seat,hexag
Alter Harry Co the Div of T E C
6685-00-479-9305CA030124 INTERCHANGEABLE
Thermostat,flow Control
Evans Tempcon Michigan, Llc
2520-00-499-8854203391 INTERCHANGEABLE
Gear
Clark Material Handling Company
9390-00-555-8865 INTERCHANGEABLE
Nonmetallic Special Shaped Secti
2990-00-569-07843391 INTERCHANGEABLE
Sleeve,sliding,clut
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
5998-00-828-9153 INTERCHANGEABLE
Circuit Card Assembly
5930-00-912-7519 INTERCHANGEABLE
Switch,push
5975-00-976-48483391 INTERCHANGEABLE
Plate,wall,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
Cross-Reference Index
Part NumberManufacturer
676571 Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
3391 PRIMARY Precision Electronics, Inc (USA)
Related Parts
5985-00-111-3503INTERCHANGEABLE
DUMMY LOAD,ELECTRICAL
GT817U1
4730-00-196-2059INTERCHANGEABLE
NIPPLE,PIPE
A733S-121CFB
5310-00-252-5498INTERCHANGEABLE
NUT,PLAIN,SINGLE BALL SEAT,HEXAG
3391
6685-00-479-9305INTERCHANGEABLE
THERMOSTAT,FLOW CONTROL
CA030124
2520-00-499-8854INTERCHANGEABLE
GEAR
203391
9390-00-555-8865INTERCHANGEABLE
NONMETALLIC SPECIAL SHAPED SECTI
2990-00-569-0784INTERCHANGEABLE
SLEEVE,SLIDING,CLUT
3391
5998-00-828-9153INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5930-00-912-7519INTERCHANGEABLE
SWITCH,PUSH
5975-00-976-4848INTERCHANGEABLE
PLATE,WALL,ELECTRICAL
3391
5310-01-024-4837INTERCHANGEABLE
WASHER,SPRING TENSION
3391
5310-01-113-3549INTERCHANGEABLE
NUT,SEAT
3391

Frequently Asked Questions

What is NSN 5950-00-648-6777?

NSN 5950-00-648-6777 is a Transformer,power, manufactured by Precision Electronics, Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-648-6777?

NSN 5950-00-648-6777 has 2 cross-referenced part numbers: 676571 (Lockheed Martin Corporation Div Rms - Mitchel Field), 3391 (Precision Electronics, Inc).

What NSN replaces 5950-00-648-6777?

There are 12 known substitutes for 5950-00-648-6777: 5985-00-111-3503, 4730-00-196-2059, 5310-00-252-5498 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3391?

Key specifications for 3391: Frequency Rating: 380.0 HERTZ MINIMUM AND 1.0 KILOHERTZ MAXIMUM SINGLE COMPONENT; Reliability Indicator: NOT ESTABLISHED; Winding Operating Current: 70.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY; Overall Height: 3.313 INCHES MAXIMUM IN. 24 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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