PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

166959Transformer,power

Northrop Grumman Systems Corporation · NSN 5950-01-204-2228 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-204-2228 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-204-2228. Primary manufacturer part number: 166959.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Input-Output Phase Relationship: THREE PHASE TO THREE PHASE SINGLE COMPONENT
  • Winding Shielding Method: INTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT
  • Mounting Facility Quantity: 4 SINGLE GROUP
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 5.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Inclosure Type: FULLY INCLOSED
  • Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-01-204-2228, 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 Northrop Grumman Systems Corporation. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 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
NSN5950-01-204-2228
Primary Part Number166959
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Input-Output Phase RelationshipTHREE PHASE TO THREE PHASE SINGLE COMPONENT
Winding Shielding MethodINTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT
Mounting Facility Quantity4 SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Width5.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Inclosure TypeFULLY INCLOSED
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Center to Center Distance Between Mounting Facilities Parallel to Length8.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Transformer Winding Connection TypeDELTA-DELTA
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Winding Operating Current1.4 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Winding Operating Voltage370.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Body Height4.750 INCHES MAXIMUM IN
Body Width6.880 INCHES MAXIMUM IN
Terminal Type and Quantity2 TERMINAL BLOCK W/SCREWS
Body Length9.380 INCHES MAXIMUM IN
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Winding Operating Current2.5 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Mounting MethodBRACKET(S) AND UNTHREADED HOLE(S) SINGLE GROUP
Mounting Hole Diameter0.296 INCHES MINIMUM SINGLE GROUP IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5945-00-066-2860702002-181 INTERCHANGEABLE
Relay,electromagnetic
Dynalec Corporation
3110-00-100-0641 INTERCHANGEABLE
Cup,tapered Roller Bearing
3110-00-100-85172050001 INTERCHANGEABLE
Bearing,ball,thrust
Frink America Inc
6505-00-126-90006222 INTERCHANGEABLE
Menthol
Mallinckrodt Inc Anesthesia Products
3110-00-144-8958110BC02 INTERCHANGEABLE
Bearing,ball,annular
Anti-Friction Bearing Mfg Assn Inc the
4730-00-264-9183 INTERCHANGEABLE
Reducer,tube
5999-00-318-26706-22-2 INTERCHANGEABLE
Contact Kit,electrical
Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc
5970-00-518-0572970 INTERCHANGEABLE
Insulator,bushing
Lta/d-Cemco Inc Dba D-Cemco
3030-00-528-4258 INTERCHANGEABLE
Belt,v
5940-00-983-6122 INTERCHANGEABLE
Terminal Board
Cross-Reference Index
Part NumberManufacturer
166959 PRIMARY Northrop Grumman Systems Corporation (USA)
TW71680 Magnetika (USA)
TW71434 Magnetika (USA)
C-12873 Electronic Transformer Corp Div Electronic Transformer Corporation (USA)
6222 Precision Electronics, Inc (USA)
Related Parts
5945-00-066-2860INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
702002-181
3110-00-100-0641INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
3110-00-100-8517INTERCHANGEABLE
BEARING,BALL,THRUST
2050001
6505-00-126-9000INTERCHANGEABLE
MENTHOL
6222
3110-00-144-8958INTERCHANGEABLE
BEARING,BALL,ANNULAR
110BC02
4730-00-264-9183INTERCHANGEABLE
REDUCER,TUBE
5999-00-318-2670INTERCHANGEABLE
CONTACT KIT,ELECTRICAL
6-22-2
5970-00-518-0572INTERCHANGEABLE
INSULATOR,BUSHING
970
3030-00-528-4258INTERCHANGEABLE
BELT,V
5940-00-983-6122INTERCHANGEABLE
TERMINAL BOARD
6220-01-142-7373INTERCHANGEABLE
LENS,LIGHT
6222
6515-01-169-7000INTERCHANGEABLE
CATHETER AND NEEDLE UNIT,INTRAVE
38-6222-1

Frequently Asked Questions

What is NSN 5950-01-204-2228?

NSN 5950-01-204-2228 is a Transformer,power, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-204-2228?

NSN 5950-01-204-2228 has 5 cross-referenced part numbers: 166959 (Northrop Grumman Systems Corporation), TW71680 (Magnetika), TW71434 (Magnetika), C-12873 (Electronic Transformer Corp Div Electronic Transformer Corporation), 6222 (Precision Electronics, Inc).

What NSN replaces 5950-01-204-2228?

There are 12 known substitutes for 5950-01-204-2228: 5945-00-066-2860, 3110-00-100-0641, 3110-00-100-8517 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 166959?

Key specifications for 166959: Reliability Indicator: NOT ESTABLISHED; Input-Output Phase Relationship: THREE PHASE TO THREE PHASE SINGLE COMPONENT; Winding Shielding Method: INTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT; Mounting Facility Quantity: 4 SINGLE GROUP. 20 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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