PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

77C709261-2Transformer,power

Lockheed Martin Corporation Div Rms · NSN 5950-00-348-6740 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-348-6740 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-348-6740. Primary manufacturer part number: 77C709261-2.
Features
  • Transformer,power — FSC 5950
  • Mounting Facility Quantity: 4 SINGLE GROUP
  • Body Length: 3.560 INCHES MAXIMUM IN
  • Frequency Rating: 60.0 HERTZ NOMINAL SINGLE COMPONENT
  • Reliability Indicator: NOT ESTABLISHED
  • Input-Output Phase Relationship: THREE PHASE TO THREE PHASE SINGLE COMPONENT
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
  • Inclosure Type: HERMETICALLY SEALED
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-348-6740, 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 Lockheed Martin Corporation Div Rms. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 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
NSN5950-00-348-6740
Primary Part Number77C709261-2
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Rms
StatusACTIVE
Mounting Facility Quantity4 SINGLE GROUP
Body Length3.560 INCHES MAXIMUM IN
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Input-Output Phase RelationshipTHREE PHASE TO THREE PHASE SINGLE COMPONENT
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Inclosure TypeHERMETICALLY SEALED
Center to Center Distance Between Mounting Facilities Parallel to Width2.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Thread Quantity Per Inch32 SINGLE GROUP
Nominal Thread Size0.164 INCHES SINGLE GROUP IN
Winding Operating Voltage27.30 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Center to Center Distance Between Mounting Facilities Parallel to Length2.625 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Width3.060 INCHES MAXIMUM IN
Terminal Type and Quantity7 TAB, SOLDER LUG
Winding Shielding MethodINTERNAL SHIELD GROUNDED TO INCLOSURE AND CORE SINGLE COMPONENT
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Body Height5.280 INCHES MAXIMUM IN
Winding Operating Voltage208.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5960-00-193-5143 INTERCHANGEABLE
Electron Tube
3120-00-350-6459 INTERCHANGEABLE
Bearing
2805-00-364-48945845 INTERCHANGEABLE
Camshaft,engine
Mitsubishi Caterpillar Forklift America, Inc
4930-00-377-68206304B INTERCHANGEABLE
Coupling,grease Gun
Alemite, Llc Dba Skf Usa Inc.
3120-00-445-84665845-5 INTERCHANGEABLE
Bushing,sleeve
Goodrich Aerospace Canada Ltd
6115-00-478-8238 INTERCHANGEABLE
Tube Assy-Fuel Pump
5940-00-683-463510557423 INTERCHANGEABLE
Terminal,stud
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
5960-00-996-0681 INTERCHANGEABLE
Electron Tube
5998-01-087-29475845 INTERCHANGEABLE
Circuit Card Assembly
Data General Corporation
2540-01-155-36135845 INTERCHANGEABLE
Arm,support,mirror
Chantilly Development Corporation Dba Acme Specialty Mfg Co Div Acme Specialty Mfg.
Cross-Reference Index
Part NumberManufacturer
9T35Y2346 General Electric Co Specialty Transformer Dept (USA)
77C709261P2 Lockheed Martin Corporation Div Rms (USA)
77C709261P002 Lockheed Martin Corporation Div Rms (USA)
77C709261-2 PRIMARY Lockheed Martin Corporation Div Rms (USA)
5845 Precision Electronics, Inc (USA)
Related Parts
5960-00-193-5143INTERCHANGEABLE
ELECTRON TUBE
3120-00-350-6459INTERCHANGEABLE
BEARING
2805-00-364-4894INTERCHANGEABLE
CAMSHAFT,ENGINE
5845
4930-00-377-6820INTERCHANGEABLE
COUPLING,GREASE GUN
6304B
3120-00-445-8466INTERCHANGEABLE
BUSHING,SLEEVE
5845-5
6115-00-478-8238INTERCHANGEABLE
TUBE ASSY-FUEL PUMP
5940-00-683-4635INTERCHANGEABLE
TERMINAL,STUD
10557423
5960-00-996-0681INTERCHANGEABLE
ELECTRON TUBE
5998-01-087-2947INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5845
2540-01-155-3613INTERCHANGEABLE
ARM,SUPPORT,MIRROR
5845
6105-01-365-4266INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
E995
5930-01-387-9990INTERCHANGEABLE
SWITCH,THERMOSTATIC
5845-G501

Frequently Asked Questions

What is NSN 5950-00-348-6740?

NSN 5950-00-348-6740 is a Transformer,power, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-348-6740?

NSN 5950-00-348-6740 has 5 cross-referenced part numbers: 9T35Y2346 (General Electric Co Specialty Transformer Dept), 77C709261P2 (Lockheed Martin Corporation Div Rms), 77C709261P002 (Lockheed Martin Corporation Div Rms), 77C709261-2 (Lockheed Martin Corporation Div Rms), 5845 (Precision Electronics, Inc).

What NSN replaces 5950-00-348-6740?

There are 12 known substitutes for 5950-00-348-6740: 5960-00-193-5143, 3120-00-350-6459, 2805-00-364-4894 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 77C709261-2?

Key specifications for 77C709261-2: Mounting Facility Quantity: 4 SINGLE GROUP; Body Length: 3.560 INCHES MAXIMUM IN; Frequency Rating: 60.0 HERTZ NOMINAL SINGLE COMPONENT; Reliability Indicator: NOT ESTABLISHED. 19 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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