PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

16P21Transformer,power

A.e.york, Llc · NSN 5950-00-889-6645 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-889-6645 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-889-6645. Primary manufacturer part number: 16P21.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Inclosure Type: FULLY INCLOSED
  • Body Length: 1.090 INCHES MAXIMUM IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Winding Operating Current: 670.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
  • Frequency Rating: 5.0 KILOHERTZ NOMINAL SINGLE COMPONENT
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 0.750 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-00-889-6645, 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 A.e.york, Llc. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-889-6645
Primary Part Number16P21
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerA.e.york, Llc
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Inclosure TypeFULLY INCLOSED
Body Length1.090 INCHES MAXIMUM IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Winding Operating Current670.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Frequency Rating5.0 KILOHERTZ NOMINAL SINGLE COMPONENT
Center to Center Distance Between Mounting Facilities Parallel to Length0.750 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Winding Operating Current22.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Terminal Type and Quantity8 TURRET
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Body Width0.910 INCHES MAXIMUM IN
Body Height0.940 INCHES MAXIMUM IN
Winding Function and Quantity1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
Winding Operating Voltage15.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Mounting Facility Quantity4 SINGLE GROUP
Winding Operating Voltage24.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Center to Center Distance Between Mounting Facilities Parallel to Width0.562 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Maximum Operating Temp130.0 CELSIUS DEGC
Nominal Thread Size0.112 INCHES SINGLE GROUP IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
2530-00-244-9841 INTERCHANGEABLE
Link,brake
5330-00-285-6381PH283 INTERCHANGEABLE
Seal,plain Encased
Wisconsin Motors, Llc
5950-00-556-1626 INTERCHANGEABLE
Saturable Reactor
6105-00-902-449840119 INTERCHANGEABLE
Case,thermostat,mot
Mas Components & Coatings, Llc Dba Mas Components & Coatings Llc
5180-01-092-0489 INTERCHANGEABLE
Service Kit,pins
3120-01-257-8409 INTERCHANGEABLE
Bearing,outer
5365-01-262-7819 INTERCHANGEABLE
Spacer,ring
4820-01-280-836340119 INTERCHANGEABLE
Seat,valve
Northrop Grumman Systems Corporation Div Marine Systems
4810-01-519-077740119-3 INTERCHANGEABLE
Base and Ring Gear Assembly
Morpac Industries, Inc Div Actuator
8465-01-565-400340119 INTERCHANGEABLE
Hydration System
Camelbak Products, Llc Dba Camelbak
Cross-Reference Index
Part NumberManufacturer
16P21 A.e.york, Llc (USA)
900128-11 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
40119 Coast/advanced Chip Magnetics, Inc. (USA)
68384 Magnetek Inc Huntington Div (USA)
Related Parts
2530-00-244-9841INTERCHANGEABLE
LINK,BRAKE
5330-00-285-6381INTERCHANGEABLE
SEAL,PLAIN ENCASED
PH283
5950-00-556-1626INTERCHANGEABLE
SATURABLE REACTOR
6105-00-902-4498INTERCHANGEABLE
CASE,THERMOSTAT,MOT
40119
5180-01-092-0489INTERCHANGEABLE
SERVICE KIT,PINS
3120-01-257-8409INTERCHANGEABLE
BEARING,OUTER
5365-01-262-7819INTERCHANGEABLE
SPACER,RING
4820-01-280-8363INTERCHANGEABLE
SEAT,VALVE
40119
4810-01-519-0777INTERCHANGEABLE
BASE AND RING GEAR ASSEMBLY
40119-3
8465-01-565-4003INTERCHANGEABLE
HYDRATION SYSTEM
40119

Frequently Asked Questions

What is NSN 5950-00-889-6645?

NSN 5950-00-889-6645 is a Transformer,power, manufactured by A.e.york, Llc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-889-6645?

NSN 5950-00-889-6645 has 4 cross-referenced part numbers: 16P21 (A.e.york, Llc), 900128-11 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 40119 (Coast/advanced Chip Magnetics, Inc.), 68384 (Magnetek Inc Huntington Div).

What NSN replaces 5950-00-889-6645?

There are 10 known substitutes for 5950-00-889-6645: 2530-00-244-9841, 5330-00-285-6381, 5950-00-556-1626 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 16P21?

Key specifications for 16P21: Reliability Indicator: NOT ESTABLISHED; Inclosure Type: FULLY INCLOSED; Body Length: 1.090 INCHES MAXIMUM IN; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP. 21 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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