PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C3663-1Transformer,power

Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company · NSN 5950-00-843-0939 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-843-0939 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-843-0939. Primary manufacturer part number: C3663-1.
Features
  • Transformer,power — FSC 5950
  • Winding Operating Current: 7.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
  • Winding Operating Voltage: 15.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
  • Inclosure Type: OPEN
  • Winding Operating Voltage: 2.50 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
  • Mounting Hole Diameter: 0.093 INCHES NOMINAL SINGLE GROUP IN
  • Mounting Method: UNTHREADED HOLE(S) SINGLE GROUP
  • Frequency Rating: 400.0 HERTZ NOMINAL 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 5950-00-843-0939, 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 Lockheed Martin Aeronautics Company. Government technical data includes 19 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-843-0939
Primary Part NumberC3663-1
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Lockheed Martin Aeronautics Company
StatusACTIVE
Winding Operating Current7.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Winding Operating Voltage15.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Inclosure TypeOPEN
Winding Operating Voltage2.50 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Mounting Hole Diameter0.093 INCHES NOMINAL SINGLE GROUP IN
Mounting MethodUNTHREADED HOLE(S) SINGLE GROUP
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Maximum Operating Temp105.0 CELSIUS DEGC
Body Height0.530 INCHES MAXIMUM IN
Winding Operating Current7.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Winding Function and Quantity1 PRIMARY AND 3 SECONDARY SINGLE COMPONENT
Winding Operating Voltage15.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY
Body Width0.450 INCHES MAXIMUM IN
Mounting Facility Quantity2 SINGLE GROUP
Reliability IndicatorNOT ESTABLISHED
Distance Between Mounting Facility Centers1.040 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Terminal Type and Quantity9 WIRE LEAD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5331-00-224-4699429559PC16 INTERCHANGEABLE
O-Ring
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
3120-00-892-1865 INTERCHANGEABLE
Bearing,sleeve
8105-01-099-035511-137 INTERCHANGEABLE
Envelope,drug Dispensing
Omega Electronics
5330-01-108-525712299211-3 INTERCHANGEABLE
Seal,nonmetallic Special Shaped
U S Army Tank Automotive Command Amsta-Im-Mm
5307-01-157-194511137 INTERCHANGEABLE
Stud,plain
Westerbeke Corporation
4320-01-200-4306C219 INTERCHANGEABLE
Ring,wearing
Circor Naval Solutions Llc Dba Warren Pumps
5365-01-283-540811137 INTERCHANGEABLE
Plug,machine Thread
Usi Inc
5340-01-321-8665BE11137 INTERCHANGEABLE
Clamp,loop
Haldex Brake Products Corporation
9925-01-450-715711137 INTERCHANGEABLE
Bible,new Testament,spanish
Biblica Us, Inc. Dba International Bible Society
Cross-Reference Index
Part NumberManufacturer
C3663-1 PRIMARY Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company (USA)
11137 Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems (USA)
Related Parts
5331-00-224-4699INTERCHANGEABLE
O-RING
429559PC16
3120-00-892-1865INTERCHANGEABLE
BEARING,SLEEVE
8105-01-099-0355INTERCHANGEABLE
ENVELOPE,DRUG DISPENSING
11-137
5330-01-108-5257INTERCHANGEABLE
SEAL,NONMETALLIC SPECIAL SHAPED
12299211-3
5307-01-157-1945INTERCHANGEABLE
STUD,PLAIN
11137
4320-01-200-4306INTERCHANGEABLE
RING,WEARING
C219
5365-01-283-5408INTERCHANGEABLE
PLUG,MACHINE THREAD
11137
5340-01-321-8665INTERCHANGEABLE
CLAMP,LOOP
BE11137
9925-01-450-7157INTERCHANGEABLE
BIBLE,NEW TESTAMENT,SPANISH
11137

Frequently Asked Questions

What is NSN 5950-00-843-0939?

NSN 5950-00-843-0939 is a Transformer,power, manufactured by Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-843-0939?

NSN 5950-00-843-0939 has 2 cross-referenced part numbers: C3663-1 (Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company), 11137 (Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems).

What NSN replaces 5950-00-843-0939?

There are 9 known substitutes for 5950-00-843-0939: 5331-00-224-4699, 3120-00-892-1865, 8105-01-099-0355 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of C3663-1?

Key specifications for C3663-1: Winding Operating Current: 7.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY; Winding Operating Voltage: 15.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY; Inclosure Type: OPEN; Winding Operating Voltage: 2.50 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY. 20 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com