PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

28166Relay,electromagnetic

Raytheon Company Dba Raytheon · NSN 5945-00-502-2901 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-502-2901 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-502-2901. Primary manufacturer part number: 28166.
Features
  • Relay,electromagnetic — FSC 5945
  • Terminal Type and Quantity: 5 PIN ALL FUNCTIONS
  • Winding Quantity: 1
  • Mounting Facility Pattern: DIAGONAL SINGLE MOUNTING FACILITY
  • Nominal Thread Size: 0.138 INCHES SINGLE MOUNTING FACILITY IN
  • Environmental Protection: HERMETIC
  • Mounting Facility Type and Quantity: 2 THREADED STUD(S) SINGLE MOUNTING FACILITY
  • Nonpile-Up Main Contact Arrangement: 1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-502-2901, 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 Raytheon Company Dba Raytheon. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-502-2901
Primary Part Number28166
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerRaytheon Company Dba Raytheon
StatusACTIVE
Terminal Type and Quantity5 PIN ALL FUNCTIONS
Winding Quantity1
Mounting Facility PatternDIAGONAL SINGLE MOUNTING FACILITY
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY IN
Environmental ProtectionHERMETIC
Mounting Facility Type and Quantity2 THREADED STUD(S) SINGLE MOUNTING FACILITY
Nonpile-Up Main Contact Arrangement1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Main Contact Maximum Voltage Rating in Volts115.0 AC AND 24.0 DC
Main Contact Load Current Rating at Maximum Rated Voltage2.0 AMPERES AC AND 2.0 AMPERES DC RESISTIVE LOAD
Thread Class2A SINGLE MOUNTING FACILITY A
Winding DC Resistance Rating5.0 KILOHMS NOMINAL SINGLE WINDING
Center to Center Distance Between Mounting Facilities Parallel to Length1.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Duty TypeCONTINUOUS
Center to Center Distance Between Mounting Facilities Parallel to Width1.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Coil Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
3110-00-560-9458 INTERCHANGEABLE
Bearing,ball,annular
4210-00-628-5633 INTERCHANGEABLE
Valve,fire Extinguisher
6210-00-812-384410250ED1065-3 INTERCHANGEABLE
Lens,light
Eaton Corp Opns & Technical Center
3510-01-208-751228-166 INTERCHANGEABLE
Panel Control,washer Extractor
Hoyt Corporation
5910-01-396-92760281660000 INTERCHANGEABLE
Capacitor,fixed,mica Dielectric
Riimic, Llc Dba Sunair Electronics
Cross-Reference Index
Part NumberManufacturer
28166 Raytheon Company Dba Raytheon (USA)
5RJ90215 Sigma Instruments Inc (USA)
271-1092P2 Raytheon Company Div Corp (USA)
Related Parts
3110-00-560-9458INTERCHANGEABLE
BEARING,BALL,ANNULAR
4210-00-628-5633INTERCHANGEABLE
VALVE,FIRE EXTINGUISHER
6210-00-812-3844INTERCHANGEABLE
LENS,LIGHT
10250ED1065-3
3510-01-208-7512INTERCHANGEABLE
PANEL CONTROL,WASHER EXTRACTOR
28-166
5910-01-396-9276INTERCHANGEABLE
CAPACITOR,FIXED,MICA DIELECTRIC
0281660000

Frequently Asked Questions

What is NSN 5945-00-502-2901?

NSN 5945-00-502-2901 is a Relay,electromagnetic, manufactured by Raytheon Company Dba Raytheon, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-502-2901?

NSN 5945-00-502-2901 has 3 cross-referenced part numbers: 28166 (Raytheon Company Dba Raytheon), 5RJ90215 (Sigma Instruments Inc), 271-1092P2 (Raytheon Company Div Corp).

What NSN replaces 5945-00-502-2901?

There are 5 known substitutes for 5945-00-502-2901: 3110-00-560-9458, 4210-00-628-5633, 6210-00-812-3844 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 28166?

Key specifications for 28166: Overall Width: 1.500 INCHES NOMINAL IN; Overall Height: 3.150 INCHES NOMINAL IN; Terminal Type and Quantity: 5 PIN ALL FUNCTIONS; Winding Quantity: 1. 19 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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