PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

221-40Transformer,power Autotransforme

Staco Energy Products Co Dba Staco Energy Products Co · NSN 5950-01-259-3312 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-259-3312 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-259-3312. Primary manufacturer part number: 221-40.
Features
  • Transformer,power Autotransforme — FSC 5950
  • Winding Function and Quantity: 1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
  • Winding Operating Current: 7.0 AMPERES AC MINIMUM AND 9.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
  • Winding Operating Voltage: 0.00 AC VOLTS MINIMUM AND 40.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
  • Winding Power Rating: 360.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY OUTPUT
  • Body Length: 1.875 INCHES NOMINAL IN
  • Body Outside Diameter: 2.812 INCHES NOMINAL IN
  • Winding Operating Voltage: 40.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power Autotransforme, cataloged under National Stock Number 5950-01-259-3312, 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 Staco Energy Products Co Dba Staco Energy Products Co. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 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
NSN5950-01-259-3312
Primary Part Number221-40
Item NameTransformer,power Autotransforme
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerStaco Energy Products Co Dba Staco Energy Products Co
StatusACTIVE
Winding Function and Quantity1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
Winding Operating Current7.0 AMPERES AC MINIMUM AND 9.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Winding Operating Voltage0.00 AC VOLTS MINIMUM AND 40.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Winding Power Rating360.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Body Length1.875 INCHES NOMINAL IN
Body Outside Diameter2.812 INCHES NOMINAL IN
Winding Operating Voltage40.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Inclosure TypeFULLY INCLOSED
Mounting MethodTERMINAL SINGLE GROUP
Terminal Type and Quantity3 TAB, SOLDER LUG
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4720-00-107-7706 INTERCHANGEABLE
Hose,nonmetallic
5910-00-356-0160 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
4720-00-554-80512652-40 INTERCHANGEABLE
Hose,nonmetallic
Danfoss Power Solutions II, Llc
6660-00-572-214022140 INTERCHANGEABLE
Roller,frictional,disc
Arco Engineering Inc
5995-00-791-5499RE49C605 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Naval Ship Systems Command
4320-00-981-063722140 INTERCHANGEABLE
Ring,wearing
Curtiss-Wright Electro-Mechanical Corporation Div Epd
5999-01-040-3090205283-1 INTERCHANGEABLE
Cap,electrical
Te Connectivity Corporation
6685-01-225-4428 INTERCHANGEABLE
Gage,assembly
5331-01-258-91481000459-P19 INTERCHANGEABLE
O-Ring
Tld Ace Corp Div Tld Ace
4810-01-355-7796 INTERCHANGEABLE
Valve,linear,directional Control
Cross-Reference Index
Part NumberManufacturer
0221D0109 Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems (USA)
221-40 PRIMARY Staco Energy Products Co Dba Staco Energy Products Co (USA)
201-40 Staco Energy Products Co Dba Staco Energy Products Co (USA)
Related Parts
4720-00-107-7706INTERCHANGEABLE
HOSE,NONMETALLIC
5910-00-356-0160INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
4720-00-554-8051INTERCHANGEABLE
HOSE,NONMETALLIC
2652-40
6660-00-572-2140INTERCHANGEABLE
ROLLER,FRICTIONAL,DISC
22140
5995-00-791-5499INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
RE49C605
4320-00-981-0637INTERCHANGEABLE
RING,WEARING
22140
5999-01-040-3090INTERCHANGEABLE
CAP,ELECTRICAL
205283-1
6685-01-225-4428INTERCHANGEABLE
GAGE,ASSEMBLY
5331-01-258-9148INTERCHANGEABLE
O-RING
1000459-P19
4810-01-355-7796INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
5940-01-363-2066INTERCHANGEABLE
TERMINAL BOARD
22-140
5120-01-569-4129INTERCHANGEABLE
ALIGNMENT TOOL,ELECTRONIC EQUIPM
22140

Frequently Asked Questions

What is NSN 5950-01-259-3312?

NSN 5950-01-259-3312 is a Transformer,power Autotransforme, manufactured by Staco Energy Products Co Dba Staco Energy Products Co, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-259-3312?

NSN 5950-01-259-3312 has 3 cross-referenced part numbers: 0221D0109 (Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems), 221-40 (Staco Energy Products Co Dba Staco Energy Products Co), 201-40 (Staco Energy Products Co Dba Staco Energy Products Co).

What NSN replaces 5950-01-259-3312?

There are 12 known substitutes for 5950-01-259-3312: 4720-00-107-7706, 5910-00-356-0160, 4720-00-554-8051 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 221-40?

Key specifications for 221-40: Winding Function and Quantity: 1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT; Winding Operating Current: 7.0 AMPERES AC MINIMUM AND 9.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT; Winding Operating Voltage: 0.00 AC VOLTS MINIMUM AND 40.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT; Winding Power Rating: 360.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY OUTPUT. 13 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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