PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8121Relay,electromagnetic

Elkay Mfg Co Water Cooler Div · NSN 5945-00-189-2094 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-189-2094 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-189-2094. Primary manufacturer part number: 8121.
Features
  • Relay,electromagnetic — FSC 5945
  • Operating Voltage Rating and Type at Specified Temp: 230.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
  • Winding Quantity: 1
  • Terminal Type and Quantity: 4 PIN ALL FUNCTIONS
  • Mounting Facility Type and Quantity: 2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Mounting Facility Pattern: IN-LINE SINGLE MOUNTING FACILITY
  • Coil Quantity: 1
  • Nominal Thread Size: 0.164 INCHES SINGLE MOUNTING FACILITY IN
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-189-2094, is classified within Federal Supply Class 5945 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Elkay Mfg Co Water Cooler Div. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-00-189-2094
Primary Part Number8121
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerElkay Mfg Co Water Cooler Div
StatusCANCELLED
Operating Voltage Rating and Type at Specified Temp230.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
Winding Quantity1
Terminal Type and Quantity4 PIN ALL FUNCTIONS
Mounting Facility Type and Quantity2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Mounting Facility PatternIN-LINE SINGLE MOUNTING FACILITY
Coil Quantity1
Nominal Thread Size0.164 INCHES SINGLE MOUNTING FACILITY IN
Duty TypeCONTINUOUS
Main Contact Maximum Voltage Rating in Volts230.0 AC
Frequency in Hertz60.0 NOMINAL
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Main Contact Load Current Rating at Maximum Rated Voltage5.0 AMPERES AC RESISTIVE LOAD
Thread Class2B SINGLE MOUNTING FACILITY
Nominal Operating Current Rating and Type8.5 AMPERES AC SINGLE WINDING
Nonpile-Up Main Contact Arrangement1 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION
Center to Center Distance Between Mounting Facilities Parallel to Length0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5935-00-052-8649 INTERCHANGEABLE
Connector,plug,electrical
5961-00-058-1178 INTERCHANGEABLE
Transistor
5950-00-198-8511672-2090-00 INTERCHANGEABLE
Transformer,power
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
6210-00-295-18378-0121-200 INTERCHANGEABLE
Lens,light
Dialight Corporation
5325-00-454-638481-21 INTERCHANGEABLE
Grommet,nonmetallic
Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes)
4730-00-483-46870041130-012 INTERCHANGEABLE
Elbow,pipe
Cleveland Service Center
3110-00-540-4662 INTERCHANGEABLE
Bearing,ball,annular
4820-00-582-1418 INTERCHANGEABLE
Valve,air
6625-00-702-7235462636-1 INTERCHANGEABLE
Meter,arbitrary Scale
Raytheon Company Dba Raytheon
5960-00-722-1044 INTERCHANGEABLE
Electron Tube
Cross-Reference Index
Part NumberManufacturer
8121 PRIMARY Elkay Mfg Co Water Cooler Div (USA)
51-08121-55 Elkay Mfg Co Water Cooler Div (USA)
9660-041-155 Sensata Technologies, Inc. Div Sensata Attleboro (USA)
Related Parts
5935-00-052-8649INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5961-00-058-1178INTERCHANGEABLE
TRANSISTOR
5950-00-198-8511INTERCHANGEABLE
TRANSFORMER,POWER
672-2090-00
6210-00-295-1837INTERCHANGEABLE
LENS,LIGHT
8-0121-200
5325-00-454-6384INTERCHANGEABLE
GROMMET,NONMETALLIC
81-21
4730-00-483-4687INTERCHANGEABLE
ELBOW,PIPE
0041130-012
3110-00-540-4662INTERCHANGEABLE
BEARING,BALL,ANNULAR
4820-00-582-1418INTERCHANGEABLE
VALVE,AIR
6625-00-702-7235INTERCHANGEABLE
METER,ARBITRARY SCALE
462636-1
5960-00-722-1044INTERCHANGEABLE
ELECTRON TUBE
5975-00-962-9891INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
8121
5930-01-049-8285INTERCHANGEABLE
SWITCH,PUSH
37655289-001

Frequently Asked Questions

What is NSN 5945-00-189-2094?

NSN 5945-00-189-2094 is a Relay,electromagnetic, manufactured by Elkay Mfg Co Water Cooler Div, classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-00-189-2094?

NSN 5945-00-189-2094 has 3 cross-referenced part numbers: 8121 (Elkay Mfg Co Water Cooler Div), 51-08121-55 (Elkay Mfg Co Water Cooler Div), 9660-041-155 (Sensata Technologies, Inc. Div Sensata Attleboro).

What NSN replaces 5945-00-189-2094?

There are 12 known substitutes for 5945-00-189-2094: 5935-00-052-8649, 5961-00-058-1178, 5950-00-198-8511 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8121?

Key specifications for 8121: Operating Voltage Rating and Type at Specified Temp: 230.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING; Overall Height: 1.000 INCHES MAXIMUM IN; Winding Quantity: 1; Terminal Type and Quantity: 4 PIN ALL FUNCTIONS. 20 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-189-2094 still in active supply?

NSN 5945-00-189-2094 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.
PartsTable Design LLC · partstable.com