PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

126-402Transformer,current

Instrument Transformers Inc · NSN 5950-01-385-6673 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-385-6673 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-385-6673. Primary manufacturer part number: 126-402.
Features
  • Transformer,current — FSC 5950
  • Winding Operating Current: 4000.0 AMPERES AC NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • Winding Function and Quantity: 1 SECONDARY SINGLE COMPONENT
  • Maximum Transformer Power Rating: 125.0 VOLT-AMPERE SINGLE COMPONENT
  • Inclosure Type: OPEN
  • Body Width: 1.530 INCHES NOMINAL IN
  • Mounting Facility Quantity: 4 SINGLE GROUP
  • Frequency Rating: 50.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM SINGLE COMPONENT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,current, cataloged under National Stock Number 5950-01-385-6673, 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 Instrument Transformers Inc. Government technical data includes 15 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-01-385-6673
Primary Part Number126-402
Item NameTransformer,current
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerInstrument Transformers Inc
StatusACTIVE
Winding Operating Current4000.0 AMPERES AC NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Winding Function and Quantity1 SECONDARY SINGLE COMPONENT
Maximum Transformer Power Rating125.0 VOLT-AMPERE SINGLE COMPONENT
Inclosure TypeOPEN
Body Width1.530 INCHES NOMINAL IN
Mounting Facility Quantity4 SINGLE GROUP
Frequency Rating50.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM SINGLE COMPONENT
Body Length10.500 INCHES NOMINAL IN
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Mounting Slot Width0.440 INCHES NOMINAL SINGLE GROUP IN
Mounting MethodBRACKET(S) AND SLOT SINGLE GROUP
Terminal Type and Quantity2 THREADED STUD
Reliability IndicatorNOT ESTABLISHED
Body Height10.500 INCHES NOMINAL IN
Winding Operating Current5.0 AMPERES AC NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
6680-01-326-8879126402 INTERCHANGEABLE
Transmitter,liquid Quantity
Setra Systems, Inc. Dba Gems Sensors
3120-01-355-7572 INTERCHANGEABLE
Bearing,washer,thrust
Cross-Reference Index
Part NumberManufacturer
126-402 PRIMARY Instrument Transformers Inc (USA)
Related Parts
6680-01-326-8879INTERCHANGEABLE
TRANSMITTER,LIQUID QUANTITY
126402
3120-01-355-7572INTERCHANGEABLE
BEARING,WASHER,THRUST

Frequently Asked Questions

What is NSN 5950-01-385-6673?

NSN 5950-01-385-6673 is a Transformer,current, manufactured by Instrument Transformers Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-385-6673?

NSN 5950-01-385-6673 has 1 cross-referenced part number: 126-402 (Instrument Transformers Inc).

What NSN replaces 5950-01-385-6673?

There are 2 known substitutes for 5950-01-385-6673: 6680-01-326-8879, 3120-01-355-7572. Verify interchangeability with system specifications before substitution.

What are the specifications of 126-402?

Key specifications for 126-402: Winding Operating Current: 4000.0 AMPERES AC NOMINAL SINGLE COMPONENT SINGLE PRIMARY; Winding Function and Quantity: 1 SECONDARY SINGLE COMPONENT; Maximum Transformer Power Rating: 125.0 VOLT-AMPERE SINGLE COMPONENT; Inclosure Type: OPEN. 17 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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