PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21027Transformer,power

Trio Laboratories Inc · NSN 5950-00-451-5508 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-451-5508 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-451-5508. Primary manufacturer part number: 21027.
Features
  • Transformer,power — FSC 5950
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 3.995 INCHES MINIMUM AND 4.005 INCHES MAXIMUM SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Body Width: 3.000 INCHES MAXIMUM IN
  • Winding Function and Quantity: 1 PRIMARY AND 12 SECONDARY SINGLE COMPONENT
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Body Height: 4.100 INCHES MAXIMUM IN
  • Transformer Winding Connection Type: DELTA-WYE
  • Nominal Thread Size: 0.250 INCHES SINGLE 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 5950-00-451-5508, 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 Trio Laboratories Inc. Government technical data includes 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-451-5508
Primary Part Number21027
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerTrio Laboratories Inc
StatusACTIVE
Center to Center Distance Between Mounting Facilities Parallel to Length3.995 INCHES MINIMUM AND 4.005 INCHES MAXIMUM SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Width3.000 INCHES MAXIMUM IN
Winding Function and Quantity1 PRIMARY AND 12 SECONDARY SINGLE COMPONENT
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Body Height4.100 INCHES MAXIMUM IN
Transformer Winding Connection TypeDELTA-WYE
Nominal Thread Size0.250 INCHES SINGLE GROUP IN
Maximum Operating Temp155.0 CELSIUS DEGC
Winding Operating Current1.4 AMPERES AC NOMINAL SINGLE COMPONENT THIRD SECONDARY
Winding Operating Current3.8 AMPERES AC NOMINAL SINGLE COMPONENT FIRST SECONDARY
Body Length5.800 INCHES MAXIMUM IN
Reliability IndicatorNOT ESTABLISHED
Features ProvidedW/RECTIFIER
Input-Output Phase RelationshipTHREE PHASE TO SIX PHASE AND THREE PHASE TO THREE PHASE SINGLE COMPONENT
Terminal Type and Quantity51 TAB, SOLDER LUG
Inclosure TypeFULLY INCLOSED
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Center to Center Distance Between Mounting Facilities Parallel to Width1.795 INCHES MINIMUM AND 1.805 INCHES MAXIMUM SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Voltage208.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Winding Operating Current6.3 AMPERES AC NOMINAL SINGLE COMPONENT SECOND SECONDARY
Mounting Facility Quantity4 SINGLE GROUP
Winding Operating Current14.0 AMPERES AC NOMINAL SINGLE COMPONENT FOURTH SECONDARY
Maximum Transformer Power Rating1070.0 WATTS SINGLE COMPONENT
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
3120-00-432-405921027 INTERCHANGEABLE
Bearing,plain,spherical
Drs C3 & Aviation Company Dba Drs Data & Imaging Systems
5305-00-591-332021027 INTERCHANGEABLE
Screw,machine
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
5905-00-794-4034210-27 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Keysight Technologies Inc
4820-01-012-286621027 INTERCHANGEABLE
Body,valve
Rogerson Aircraft Equipment Group
4720-01-230-909821027 INTERCHANGEABLE
Hose,preformed
Gates Corporation
4820-01-322-90362-1027 INTERCHANGEABLE
Seat,valve
Malabar
5305-01-333-4689 INTERCHANGEABLE
Screw,machine
5340-01-347-9676 INTERCHANGEABLE
Bracket,angle
5970-01-386-303121027 INTERCHANGEABLE
Insulator,strain
Science Applications International Corporation
5340-01-619-748421-027 INTERCHANGEABLE
Magnet,permanent
Hii Unmanned Systems, Inc
Cross-Reference Index
Part NumberManufacturer
21027 Trio Laboratories Inc (USA)
Related Parts
3120-00-432-4059INTERCHANGEABLE
BEARING,PLAIN,SPHERICAL
21027
5305-00-591-3320INTERCHANGEABLE
SCREW,MACHINE
21027
5905-00-794-4034INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
210-27
4820-01-012-2866INTERCHANGEABLE
BODY,VALVE
21027
4720-01-230-9098INTERCHANGEABLE
HOSE,PREFORMED
21027
4820-01-322-9036INTERCHANGEABLE
SEAT,VALVE
2-1027
5305-01-333-4689INTERCHANGEABLE
SCREW,MACHINE
5340-01-347-9676INTERCHANGEABLE
BRACKET,ANGLE
5970-01-386-3031INTERCHANGEABLE
INSULATOR,STRAIN
21027
5340-01-619-7484INTERCHANGEABLE
MAGNET,PERMANENT
21-027

Frequently Asked Questions

What is NSN 5950-00-451-5508?

NSN 5950-00-451-5508 is a Transformer,power, manufactured by Trio Laboratories Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-451-5508?

NSN 5950-00-451-5508 has 1 cross-referenced part number: 21027 (Trio Laboratories Inc).

What NSN replaces 5950-00-451-5508?

There are 10 known substitutes for 5950-00-451-5508: 3120-00-432-4059, 5305-00-591-3320, 5905-00-794-4034 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21027?

Key specifications for 21027: Center to Center Distance Between Mounting Facilities Parallel to Length: 3.995 INCHES MINIMUM AND 4.005 INCHES MAXIMUM SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Body Width: 3.000 INCHES MAXIMUM IN; Winding Function and Quantity: 1 PRIMARY AND 12 SECONDARY SINGLE COMPONENT; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP. 25 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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