PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

661712Transformer,power

Lockheed Martin Corporation Div Rms - Mitchel Field · NSN 5950-00-648-3980 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-648-3980 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-648-3980. Primary manufacturer part number: 661712.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • Winding Operating Current: 16.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
  • Nominal Thread Size: 0.138 INCHES SINGLE GROUP IN
  • Winding Operating Voltage: 15.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
  • Winding Operating Current: 6.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
  • Distance Between Mounting Facility Centers: 1.812 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-648-3980, 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 - Mitchel Field. Government technical data includes 21 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-00-648-3980
Primary Part Number661712
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Rms - Mitchel Field
StatusCANCELLED
Reliability IndicatorNOT ESTABLISHED
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Winding Operating Current16.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Winding Operating Voltage15.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Winding Operating Current6.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY
Distance Between Mounting Facility Centers1.812 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Current6.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Thread Series DesignatorUNF SINGLE GROUP
Terminal Type and Quantity9 TAB, SOLDER LUG
Winding Operating Voltage45.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Winding Operating Voltage48.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Body Length2.219 INCHES NOMINAL IN
Winding Function and Quantity1 PRIMARY AND 3 SECONDARY SINGLE COMPONENT
Body Outside Diameter1.562 INCHES NOMINAL IN
Mounting Facility Quantity2 SINGLE GROUP
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Inclosure TypeHERMETICALLY SEALED
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Winding Shielding MethodINTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6250-00-023-84587-04 INTERCHANGEABLE
Lampholder
Lighting Components and Design Incorporated Dba Lc&d
4730-00-203-8035183-2-18 INTERCHANGEABLE
Fitting,lubrication
Almon Johnson Ltd
6230-00-270-5417 INTERCHANGEABLE
Flashlight
5920-00-617-98891925 INTERCHANGEABLE
Fuseholder,block
Bryant Electric
5342-00-733-5364 INTERCHANGEABLE
Bumper,recess,molde
5355-00-957-1729 INTERCHANGEABLE
Knob
7320-01-150-4075 INTERCHANGEABLE
Manifold,wash Head
6520-01-153-6099 INTERCHANGEABLE
Restorative Kit,dental
3020-01-174-3777 INTERCHANGEABLE
Gear,spur
6210-01-230-08691925 INTERCHANGEABLE
Fixture,lighting
Murlin Mfg Corp
Cross-Reference Index
Part NumberManufacturer
1925 Precision Electronics, Inc (USA)
P1-14570 Mte Corp Milwaukee Transformer Co (USA)
661712 PRIMARY Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
Related Parts
6250-00-023-8458INTERCHANGEABLE
LAMPHOLDER
7-04
4730-00-203-8035INTERCHANGEABLE
FITTING,LUBRICATION
183-2-18
6230-00-270-5417INTERCHANGEABLE
FLASHLIGHT
5920-00-617-9889INTERCHANGEABLE
FUSEHOLDER,BLOCK
1925
5342-00-733-5364INTERCHANGEABLE
BUMPER,RECESS,MOLDE
5355-00-957-1729INTERCHANGEABLE
KNOB
7320-01-150-4075INTERCHANGEABLE
MANIFOLD,WASH HEAD
6520-01-153-6099INTERCHANGEABLE
RESTORATIVE KIT,DENTAL
3020-01-174-3777INTERCHANGEABLE
GEAR,SPUR
6210-01-230-0869INTERCHANGEABLE
FIXTURE,LIGHTING
1925
3020-01-262-3340INTERCHANGEABLE
GEAR,HELICAL
D-25150-1925
5985-01-268-8291INTERCHANGEABLE
ANTENNA COUPLER GROUP
1925

Frequently Asked Questions

What is NSN 5950-00-648-3980?

NSN 5950-00-648-3980 is a Transformer,power, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-00-648-3980?

NSN 5950-00-648-3980 has 3 cross-referenced part numbers: 1925 (Precision Electronics, Inc), P1-14570 (Mte Corp Milwaukee Transformer Co), 661712 (Lockheed Martin Corporation Div Rms - Mitchel Field).

What NSN replaces 5950-00-648-3980?

There are 12 known substitutes for 5950-00-648-3980: 6250-00-023-8458, 4730-00-203-8035, 6230-00-270-5417 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 661712?

Key specifications for 661712: Reliability Indicator: NOT ESTABLISHED; Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY; Winding Operating Current: 16.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY; Nominal Thread Size: 0.138 INCHES SINGLE GROUP IN. 21 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-00-648-3980 still in active supply?

NSN 5950-00-648-3980 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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