PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A3877Transformer,audio Frequency

Emerson Electric Co White-Rodgers Div · NSN 5950-00-645-0786 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-645-0786 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-645-0786. Primary manufacturer part number: A3877.
Features
  • Transformer,audio Frequency — FSC 5950
  • Body Length: 1.875 INCHES NOMINAL IN
  • Mounting Method: FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
  • Impedance Rating in Ohms: 4.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
  • Body Height: 1.375 INCHES NOMINAL IN
  • Mounting Facility Quantity: 2 SINGLE GROUP
  • Impedance Rating in Ohms: 5000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
  • Winding Operating Current: 40.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-645-0786, 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 Emerson Electric Co White-Rodgers Div. 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-00-645-0786
Primary Part NumberA3877
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerEmerson Electric Co White-Rodgers Div
StatusCANCELLED
Body Length1.875 INCHES NOMINAL IN
Mounting MethodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
Impedance Rating in Ohms4.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Body Height1.375 INCHES NOMINAL IN
Mounting Facility Quantity2 SINGLE GROUP
Impedance Rating in Ohms5000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Winding Operating Current40.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY
Maximum Transformer Power Rating5.0 WATTS SINGLE COMPONENT
Body Width1.375 INCHES NOMINAL IN
Primary to Secondary Turn Ratio1 TO 35-1/3 SINGLE COMPONENT
Winding Function and Quantity1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Terminal Type and Quantity4 WIRE LEAD
Distance Between Mounting Facility Centers2.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Inclosure TypeOPEN
Reliability IndicatorNOT ESTABLISHED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
3110-00-142-438609195 INTERCHANGEABLE
Cup,tapered Roller Bearing
The Timken Corporation
4720-00-356-2048 INTERCHANGEABLE
Hose Assembly,nonmetallic
1650-00-421-8264A3877 INTERCHANGEABLE
Fitting,constant S
Eaton Aerospace Llc Div Fluid and Electrical Distribution Division
5995-00-727-5009A3877 INTERCHANGEABLE
Lead,electrical
Grimes Aerospace Company
4710-00-785-94753877 INTERCHANGEABLE
Tube Assembly,metal
Renk America Llc Div Renk America
Cross-Reference Index
Part NumberManufacturer
A3877 Emerson Electric Co White-Rodgers Div (USA)
Related Parts
3110-00-142-4386INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
09195
4720-00-356-2048INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
1650-00-421-8264INTERCHANGEABLE
FITTING,CONSTANT S
A3877
5995-00-727-5009INTERCHANGEABLE
LEAD,ELECTRICAL
A3877
4710-00-785-9475INTERCHANGEABLE
TUBE ASSEMBLY,METAL
3877

Frequently Asked Questions

What is NSN 5950-00-645-0786?

NSN 5950-00-645-0786 is a Transformer,audio Frequency, manufactured by Emerson Electric Co White-Rodgers Div, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-00-645-0786?

NSN 5950-00-645-0786 has 1 cross-referenced part number: A3877 (Emerson Electric Co White-Rodgers Div).

What NSN replaces 5950-00-645-0786?

There are 5 known substitutes for 5950-00-645-0786: 3110-00-142-4386, 4720-00-356-2048, 1650-00-421-8264 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A3877?

Key specifications for A3877: Body Length: 1.875 INCHES NOMINAL IN; Mounting Method: FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP; Impedance Rating in Ohms: 4.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY; Body Height: 1.375 INCHES NOMINAL IN. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-00-645-0786 still in active supply?

NSN 5950-00-645-0786 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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