PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FC404-2Relay,electromagnetic

Struthers-Dunn Inc · NSN 5945-00-818-8904 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-818-8904 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-818-8904. Primary manufacturer part number: FC404-2.
Features
  • Relay,electromagnetic — FSC 5945
  • Nonpile-Up Main Contact Arrangement: 4 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 1.187 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Test Data Document: 81349-MIL-R-6106 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Nominal Thread Size: 0.138 INCHES SINGLE MOUNTING FACILITY IN
  • Main Contact Load Current Rating at Maximum Rated Voltage: 5.0 AMPERES AC AND 5.0 AMPERES DC RESISTIVE LOAD
  • Mounting Facility Pattern: RECTANGULAR SINGLE MOUNTING FACILITY
  • Terminal Type and Quantity: 14 WIRE HOOK ALL FUNCTIONS
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-818-8904, 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 Struthers-Dunn Inc. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 16 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-00-818-8904
Primary Part NumberFC404-2
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerStruthers-Dunn Inc
StatusCANCELLED
Nonpile-Up Main Contact Arrangement4 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Center to Center Distance Between Mounting Facilities Parallel to Length1.187 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Test Data Document81349-MIL-R-6106 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY IN
Main Contact Load Current Rating at Maximum Rated Voltage5.0 AMPERES AC AND 5.0 AMPERES DC RESISTIVE LOAD
Mounting Facility PatternRECTANGULAR SINGLE MOUNTING FACILITY
Terminal Type and Quantity14 WIRE HOOK ALL FUNCTIONS
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Specification/standard Data96906-MS25267 GOVERNMENT STANDARD
Operating Voltage Rating and Type at Specified Temp115.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
Coil Quantity1
Fragility FactorMODERATELY RUGGED
Frequency in Hertz400.0 NOMINAL
Main Contact Load Current Rating at Maximum Rated Voltage3.0 AMPERES AC AND 3.0 AMPERES DC INDUCTIVE LOAD
Duty TypeCONTINUOUS
Center to Center Distance Between Mounting Facilities Parallel to Width0.687 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Environmental ProtectionHERMETIC
Mounting Facility Type and Quantity4 THREADED STUD(S) SINGLE MOUNTING FACILITY
Winding Quantity1
Main Contact Load Current Rating at Maximum Rated Voltage800.0 MILLIAMPERES AC AND 800.0 MILLIAMPERES DC LAMP LOAD
Cubic Measure3.783 CUBIC INCHES
Storage TypeGENERAL PURPOSE WAREHOUSE
Time Delay0.02 SECONDS MAXIMUM FIXED OPERATE AND RELEASE TIME
Thread DirectionRIGHT-HAND SINGLE MOUNTING FACILITY
Main Contact Maximum Voltage Rating in Volts115.0 AC AND 28.0 DC
Arc Quenching MethodAIR
Thread Class2A SINGLE MOUNTING FACILITY A
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
4310-00-175-6226P35222 INTERCHANGEABLE
Compressor Unit,reciprocating
Altec Air, Llc Dba Altec Llc
5360-00-323-874241061 INTERCHANGEABLE
Spring,helical,torsion
Hanovia Specialty Lighting Llc
5340-00-523-6418 INTERCHANGEABLE
Clip,end,strap
5945-00-914-0152 INTERCHANGEABLE
Relay,electromagnetic
3455-01-164-221741061 INTERCHANGEABLE
Cutter,milling,end
Kennametal Inc. Div Kennametal Industrial Products Group
8465-01-589-112741061 INTERCHANGEABLE
Hydration System
Camelbak Products, Llc Dba Camelbak
Cross-Reference Index
Part NumberManufacturer
FC404-2 Struthers-Dunn Inc (USA)
438-6726443 FIND 8 Naval Sea Systems Command (USA)
4106-1 Wing Corp (USA)
3975-99004 Seacon Brantner & Associates Dba Seacon Giannini (USA)
3975-99004 Hurletronaltair Inc (USA)
1730-479 Woodward, Inc. (USA)
G370039S2 L3harris Technologies, Inc Div Space & Airborne Systems (USA)
9220-4186 Leach International Corp Div Leach International Corporation (USA)
5945PL1368771 Jednolity Indeks Materialowy - Uniform Material Index (POL)
438-6404473-29 Naval Sea Systems Command (USA)
M5757-15-005 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-R-6106 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
4S1639-67 Bfgoodrich Co the Aerospace Div Engineered Polymer Products (USA)
M1LR5757-15-005 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS25267-A1 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-6106 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4310-00-175-6226INTERCHANGEABLE
COMPRESSOR UNIT,RECIPROCATING
P35222
5360-00-323-8742INTERCHANGEABLE
SPRING,HELICAL,TORSION
41061
5340-00-523-6418INTERCHANGEABLE
CLIP,END,STRAP
5945-00-914-0152INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
3455-01-164-2217INTERCHANGEABLE
CUTTER,MILLING,END
41061
8465-01-589-1127INTERCHANGEABLE
HYDRATION SYSTEM
41061

Frequently Asked Questions

What is NSN 5945-00-818-8904?

NSN 5945-00-818-8904 is a Relay,electromagnetic, manufactured by Struthers-Dunn Inc, classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-00-818-8904?

NSN 5945-00-818-8904 has 16 cross-referenced part numbers: FC404-2 (Struthers-Dunn Inc), 438-6726443 FIND 8 (Naval Sea Systems Command), 4106-1 (Wing Corp), 3975-99004 (Seacon Brantner & Associates Dba Seacon Giannini), 3975-99004 (Hurletronaltair Inc) and 11 more.

What NSN replaces 5945-00-818-8904?

There are 6 known substitutes for 5945-00-818-8904: 4310-00-175-6226, 5360-00-323-8742, 5340-00-523-6418 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FC404-2?

Key specifications for FC404-2: Nonpile-Up Main Contact Arrangement: 4 POLE, DOUBLE THROW, ONE POSITION MOMENTARY; Center to Center Distance Between Mounting Facilities Parallel to Length: 1.187 INCHES NOMINAL SINGLE MOUNTING FACILITY IN; Test Data Document: 81349-MIL-R-6106 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).; Nominal Thread Size: 0.138 INCHES SINGLE MOUNTING FACILITY IN. 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-818-8904 still in active supply?

NSN 5945-00-818-8904 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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