PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3521Transformer,power

California Coil Co Inc · NSN 5950-01-135-7731 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-135-7731 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-135-7731. Primary manufacturer part number: 3521.
Features
  • Transformer,power — FSC 5950
  • Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
  • Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
  • Winding Operating Voltage: 200.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
  • Frequency Rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT
  • Terminal Type and Quantity: 5 WIRE LEAD
  • 1 verified cross-reference
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-01-135-7731, 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 California Coil Co Inc. Government technical data includes 6 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-01-135-7731
Primary Part Number3521
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerCalifornia Coil Co Inc
StatusACTIVE
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Winding Operating Voltage200.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Terminal Type and Quantity5 WIRE LEAD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6510-00-054-72567000030208 INTERCHANGEABLE
Skin Closure,adhesive,surgical
Solventum Us Llc
3110-00-100-5842108-109-6PC487 INTERCHANGEABLE
Bearing,roller,tapered
Struthers Wells Corp
5120-00-104-55596-76070-1 INTERCHANGEABLE
Wrench,orifice
Northrop Grumman Systems Corporation
4820-00-200-0664CFA40614 INTERCHANGEABLE
Valve,globe
Curtis Dyna-Fog, Ltd.
5306-00-218-143635-21 INTERCHANGEABLE
Bolt,shoulder
Dresser Industries Inc Leroi Div
4730-00-867-90283521 INTERCHANGEABLE
Adapter Bushing
Coffin Turbo Pump Inc
5935-00-899-36693521-C INTERCHANGEABLE
Connector,plug,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
5950-00-910-93186140026-12 INTERCHANGEABLE
Transformer,radio Frequency
Viking Technologies, Ltd.
4920-00-918-49593-5-2-1 INTERCHANGEABLE
Lift Pin
Celtech Corporation Div Use CAGE 65552 for All Orders
3020-01-025-82763521 INTERCHANGEABLE
Gear Cam Assembly
Kearflex Engineering Company
Cross-Reference Index
Part NumberManufacturer
3521 California Coil Co Inc (USA)
Related Parts
6510-00-054-7256INTERCHANGEABLE
SKIN CLOSURE,ADHESIVE,SURGICAL
7000030208
3110-00-100-5842INTERCHANGEABLE
BEARING,ROLLER,TAPERED
108-109-6PC487
5120-00-104-5559INTERCHANGEABLE
WRENCH,ORIFICE
6-76070-1
4820-00-200-0664INTERCHANGEABLE
VALVE,GLOBE
CFA40614
5306-00-218-1436INTERCHANGEABLE
BOLT,SHOULDER
35-21
4730-00-867-9028INTERCHANGEABLE
ADAPTER BUSHING
3521
5935-00-899-3669INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
3521-C
5950-00-910-9318INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
6140026-12
4920-00-918-4959INTERCHANGEABLE
LIFT PIN
3-5-2-1
3020-01-025-8276INTERCHANGEABLE
GEAR CAM ASSEMBLY
3521
3010-01-068-7868INTERCHANGEABLE
PLATE REDUCER
35-21
5935-01-087-0186INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
3521

Frequently Asked Questions

What is NSN 5950-01-135-7731?

NSN 5950-01-135-7731 is a Transformer,power, manufactured by California Coil Co Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-135-7731?

NSN 5950-01-135-7731 has 1 cross-referenced part number: 3521 (California Coil Co Inc).

What NSN replaces 5950-01-135-7731?

There are 12 known substitutes for 5950-01-135-7731: 6510-00-054-7256, 3110-00-100-5842, 5120-00-104-5559 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3521?

Key specifications for 3521: Winding Function and Quantity: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT; Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY; Winding Operating Voltage: 200.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY; Special Features: TRANSFORMER ASSY 3594 INCORPORATES 3521 AND 3522 TRANSFORMERS IN A 3 PHASE TO 2 PHASE SCOTT CIRCUIT. 7 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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