PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12685Transformer,power

Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems · NSN 5950-00-261-8234 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-261-8234 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-261-8234. Primary manufacturer part number: 12685.
Features
  • Transformer,power — FSC 5950
  • Terminal Type and Quantity: 6 WIRE LEAD
  • Inclosure Type: HERMETICALLY SEALED
  • Transformer Winding Connection Type: WYE-WYE
  • Winding Operating Voltage: 10.50 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • Input-Output Phase Relationship: THREE PHASE TO THREE PHASE SINGLE COMPONENT
  • Frequency Rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT
  • Body Outside Diameter: 1.125 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 5950-00-261-8234, 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 Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems. Government technical data includes 19 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-00-261-8234
Primary Part Number12685
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerOeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems
StatusCANCELLED
Terminal Type and Quantity6 WIRE LEAD
Inclosure TypeHERMETICALLY SEALED
Transformer Winding Connection TypeWYE-WYE
Winding Operating Voltage10.50 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Input-Output Phase RelationshipTHREE PHASE TO THREE PHASE SINGLE COMPONENT
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Body Outside Diameter1.125 INCHES MAXIMUM IN
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Maximum Operating Temp85.0 CELSIUS DEGC
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Features ProvidedCOLOR CODED LEAD
Winding Operating Current36.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Mounting Facility Quantity3 SINGLE GROUP
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Body Length1.125 INCHES MAXIMUM IN
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Mounting Bolt Circle Diameter1.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Voltage9.50 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
5360-00-058-655512685 INTERCHANGEABLE
Spring,helical,compression
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
3413-00-762-60364260-1 INTERCHANGEABLE
Drilling Machine,upright
Milwaukee Electric Tool Corp Dba Milwaukee Electric Tools
2815-00-875-829412685 INTERCHANGEABLE
Cover,valve Adjusting
Westerbeke Corporation
5950-01-025-7211905516-2 INTERCHANGEABLE
Transformer,power
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
3040-01-082-8914 INTERCHANGEABLE
Worm Shaft
9390-01-189-59889637100004 H.50 W.50 INTERCHANGEABLE
Nonmetallic Special Shaped Secti
Grove U.s. Llc Dba Grove Us Llc
7310-01-241-752712685 INTERCHANGEABLE
Control,damper,ventilator
Itw Food Equipment Group Llc Dba Gaylord Industries
5340-01-382-983012685 INTERCHANGEABLE
Boot,dust and Moisture Seal
Galow Metal Products Inc Dba Metal Glow
5895-01-437-396942601 INTERCHANGEABLE
Modem,communications
Motorola/codex Corp Sub of Motorola Inc
Cross-Reference Index
Part NumberManufacturer
12685 PRIMARY Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems (USA)
42601 Coast/advanced Chip Magnetics, Inc. (USA)
5M931-20 The Boeing Company Div Defense (USA)
Related Parts
5360-00-058-6555INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
12685
3413-00-762-6036INTERCHANGEABLE
DRILLING MACHINE,UPRIGHT
4260-1
2815-00-875-8294INTERCHANGEABLE
COVER,VALVE ADJUSTING
12685
5950-01-025-7211INTERCHANGEABLE
TRANSFORMER,POWER
905516-2
3040-01-082-8914INTERCHANGEABLE
WORM SHAFT
9390-01-189-5988INTERCHANGEABLE
NONMETALLIC SPECIAL SHAPED SECTI
9637100004 H.50 W.50
7310-01-241-7527INTERCHANGEABLE
CONTROL,DAMPER,VENTILATOR
12685
5340-01-382-9830INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
12685
5895-01-437-3969INTERCHANGEABLE
MODEM,COMMUNICATIONS
42601

Frequently Asked Questions

What is NSN 5950-00-261-8234?

NSN 5950-00-261-8234 is a Transformer,power, manufactured by Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-00-261-8234?

NSN 5950-00-261-8234 has 3 cross-referenced part numbers: 12685 (Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems), 42601 (Coast/advanced Chip Magnetics, Inc.), 5M931-20 (The Boeing Company Div Defense).

What NSN replaces 5950-00-261-8234?

There are 9 known substitutes for 5950-00-261-8234: 5360-00-058-6555, 3413-00-762-6036, 2815-00-875-8294 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12685?

Key specifications for 12685: Terminal Type and Quantity: 6 WIRE LEAD; Inclosure Type: HERMETICALLY SEALED; Transformer Winding Connection Type: WYE-WYE; Winding Operating Voltage: 10.50 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY. 19 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-00-261-8234 still in active supply?

NSN 5950-00-261-8234 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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