PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

BTC-12259Coil,electrical

Berkshire Transformer · NSN 5950-01-185-9991 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-185-9991 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-185-9991. Primary manufacturer part number: BTC-12259.
Features
  • Coil,electrical — FSC 5950
  • Winding Quantity: 1 SINGLE COMPONENT
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 3.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Winding Operating Voltage: 1.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE WINDING
  • Rating Method: ELECTRICAL SINGLE COMPONENT SINGLE WINDING
  • Terminal Type and Quantity: 2 WIRE LEAD
  • Body Height: 3.812 INCHES NOMINAL IN
  • Inductance Rating: 5.00 MILLIHENRIES MINIMUM SINGLE COMPONENT SINGLE WINDING
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Coil,electrical, cataloged under National Stock Number 5950-01-185-9991, 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 Berkshire Transformer. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-01-185-9991
Primary Part NumberBTC-12259
Item NameCoil,electrical
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerBerkshire Transformer
StatusACTIVE
Winding Quantity1 SINGLE COMPONENT
Center to Center Distance Between Mounting Facilities Parallel to Width3.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Voltage1.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE WINDING
Rating MethodELECTRICAL SINGLE COMPONENT SINGLE WINDING
Terminal Type and Quantity2 WIRE LEAD
Body Height3.812 INCHES NOMINAL IN
Inductance Rating5.00 MILLIHENRIES MINIMUM SINGLE COMPONENT SINGLE WINDING
Frequency Rating60.0 HERTZ NOMINAL SINGLE COMPONENT
Inclosure TypeFULLY INCLOSED
Mounting Facility Quantity4 SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Length3.750 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting Slot Width0.203 INCHES NOMINAL SINGLE GROUP IN
Mounting MethodSLOT SINGLE GROUP
Body Width4.375 INCHES MAXIMUM IN
Body Length4.500 INCHES NOMINAL IN
Reliability IndicatorNOT ESTABLISHED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5133-00-189-9304 INTERCHANGEABLE
Drill,twist
1560-00-210-932612259 INTERCHANGEABLE
Trimstrip,window
Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company
5133-00-228-1354 INTERCHANGEABLE
Drill,twist
5905-00-807-3315 INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
5305-00-993-874812259 INTERCHANGEABLE
Screw,machine
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
5365-01-333-266012259 INTERCHANGEABLE
Plug,machine Thread
Stanadyne Corporation Dba Stanadyne Diesel Systems
Cross-Reference Index
Part NumberManufacturer
BTC-12259 PRIMARY Berkshire Transformer (USA)
12259 Berkshire Transformer (USA)
Related Parts
5133-00-189-9304INTERCHANGEABLE
DRILL,TWIST
1560-00-210-9326INTERCHANGEABLE
TRIMSTRIP,WINDOW
12259
5133-00-228-1354INTERCHANGEABLE
DRILL,TWIST
5905-00-807-3315INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
5305-00-993-8748INTERCHANGEABLE
SCREW,MACHINE
12259
5365-01-333-2660INTERCHANGEABLE
PLUG,MACHINE THREAD
12259

Frequently Asked Questions

What is NSN 5950-01-185-9991?

NSN 5950-01-185-9991 is a Coil,electrical, manufactured by Berkshire Transformer, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-185-9991?

NSN 5950-01-185-9991 has 2 cross-referenced part numbers: BTC-12259 (Berkshire Transformer), 12259 (Berkshire Transformer).

What NSN replaces 5950-01-185-9991?

There are 6 known substitutes for 5950-01-185-9991: 5133-00-189-9304, 1560-00-210-9326, 5133-00-228-1354 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of BTC-12259?

Key specifications for BTC-12259: Winding Quantity: 1 SINGLE COMPONENT; Center to Center Distance Between Mounting Facilities Parallel to Width: 3.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Winding Operating Voltage: 1.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE WINDING; Rating Method: ELECTRICAL SINGLE COMPONENT SINGLE WINDING. 16 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com