PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

E520HBTransformer,power

Emerson Electric Co White-Rodgers Div · NSN 5950-00-645-2127 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-645-2127 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-645-2127. Primary manufacturer part number: E520HB.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Inclosure Type: HERMETICALLY SEALED
  • Winding Operating Current: 20.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
  • Mounting Method: UNTHREADED HOLE(S) SINGLE GROUP
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Frequency Rating: 50.0 HERTZ NOMINAL OR 60.0 HERTZ NOMINAL SINGLE COMPONENT
  • Winding Function and Quantity: 2 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-645-2127, 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 17 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-645-2127
Primary Part NumberE520HB
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerEmerson Electric Co White-Rodgers Div
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Inclosure TypeHERMETICALLY SEALED
Winding Operating Current20.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Mounting MethodUNTHREADED HOLE(S) SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Width1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Frequency Rating50.0 HERTZ NOMINAL OR 60.0 HERTZ NOMINAL SINGLE COMPONENT
Winding Function and Quantity2 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT ALL PRIMARY
Center to Center Distance Between Mounting Facilities Parallel to Length4.750 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Terminal Type and Quantity7 STANDOFF, THREADED STUD
Winding Operating Voltage5.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Mounting Facility Quantity6 SINGLE GROUP
Body Height5.312 INCHES MAXIMUM IN
Body Width4.625 INCHES MAXIMUM IN
Mounting Hole Diameter0.230 INCHES NOMINAL SINGLE GROUP IN
Body Length5.312 INCHES NOMINAL IN
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5133-00-189-9285 INTERCHANGEABLE
Drill,twist
5133-00-228-1321 INTERCHANGEABLE
Drill,twist
5120-00-757-0774 INTERCHANGEABLE
Puller,mechanical
4820-00-828-318612-240 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Matheson Co Div of G D Searle Medical Products
6250-00-995-907412-240 INTERCHANGEABLE
Lampholder
Lighting Components and Design Incorporated Dba Lc&d
6210-01-147-7833 INTERCHANGEABLE
Lens,light
3455-01-203-276512240 INTERCHANGEABLE
Trepanning Tool,machine
Hougen Manufacturing, Inc
6150-01-307-0256549F INTERCHANGEABLE
Cable Assembly,special Purpose,e
Belden, Inc.
5360-01-312-158212240 INTERCHANGEABLE
Spring,helical,compression
Mag Aerospace Industries, Llc Div Safran Cabins
6240-01-344-695170A/W/EP/24PK/120V INTERCHANGEABLE
Lamp,incandescent
Gte Products Corp Sylvania Miniature Lighting Div
Cross-Reference Index
Part NumberManufacturer
E520HB Emerson Electric Co White-Rodgers Div (USA)
12240 Emerson Electric Co White-Rodgers Div (USA)
Related Parts
5133-00-189-9285INTERCHANGEABLE
DRILL,TWIST
5133-00-228-1321INTERCHANGEABLE
DRILL,TWIST
5120-00-757-0774INTERCHANGEABLE
PULLER,MECHANICAL
4820-00-828-3186INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
12-240
6250-00-995-9074INTERCHANGEABLE
LAMPHOLDER
12-240
6210-01-147-7833INTERCHANGEABLE
LENS,LIGHT
3455-01-203-2765INTERCHANGEABLE
TREPANNING TOOL,MACHINE
12240
6150-01-307-0256INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
549F
5360-01-312-1582INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
12240
6240-01-344-6951INTERCHANGEABLE
LAMP,INCANDESCENT
70A/W/EP/24PK/120V
5895-01-435-7373INTERCHANGEABLE
MODEM,COMMUNICATIONS
3433-01-446-0857INTERCHANGEABLE
CUTTING MACHINE,PLASMA ARC
1-2240

Frequently Asked Questions

What is NSN 5950-00-645-2127?

NSN 5950-00-645-2127 is a Transformer,power, manufactured by Emerson Electric Co White-Rodgers Div, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-645-2127?

NSN 5950-00-645-2127 has 2 cross-referenced part numbers: E520HB (Emerson Electric Co White-Rodgers Div), 12240 (Emerson Electric Co White-Rodgers Div).

What NSN replaces 5950-00-645-2127?

There are 12 known substitutes for 5950-00-645-2127: 5133-00-189-9285, 5133-00-228-1321, 5120-00-757-0774 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of E520HB?

Key specifications for E520HB: Reliability Indicator: NOT ESTABLISHED; Inclosure Type: HERMETICALLY SEALED; Winding Operating Current: 20.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY; Mounting Method: UNTHREADED HOLE(S) SINGLE GROUP. 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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