PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SM-C-143770Relay,electromagnetic

Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir · NSN 5945-00-259-6446 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-259-6446 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-259-6446. Primary manufacturer part number: SM-C-143770.
Features
  • Relay,electromagnetic — FSC 5945
  • Pile-Up Main Contact Form Arrangement: 1A A
  • Mounting Facility Type and Quantity: 4 THREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Thread Class: 2B SINGLE MOUNTING FACILITY
  • Nominal Operating Current Rating and Type: 57.5 MILLIAMPERES DC SINGLE WINDING
  • Thread Direction: RIGHT-HAND SINGLE MOUNTING FACILITY
  • Winding Quantity: 1
  • Coil Quantity: 1
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-259-6446, 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 Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-00-259-6446
Primary Part NumberSM-C-143770
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerUs Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
StatusCANCELLED
Pile-Up Main Contact Form Arrangement1A A
Mounting Facility Type and Quantity4 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Thread Class2B SINGLE MOUNTING FACILITY
Nominal Operating Current Rating and Type57.5 MILLIAMPERES DC SINGLE WINDING
Thread DirectionRIGHT-HAND SINGLE MOUNTING FACILITY
Winding Quantity1
Coil Quantity1
Arc Quenching MethodAIR
Operating Voltage Rating and Type at Specified Temp27.5 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Center to Center Distance Between Mounting Facilities Parallel to Width0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Fragility FactorMODERATELY RUGGED
Thread Quantity Per Inch40 SINGLE MOUNTING FACILITY
Purpose for Which DesignedGENERAL
Nominal Thread Size0.112 INCHES SINGLE MOUNTING FACILITY IN
Storage TypeGENERAL PURPOSE WAREHOUSE
Cubic Measure1.024 CUBIC INCHES
Terminal Type and Quantity4 TAB, SOLDER LUG ALL FUNCTIONS
Mounting Facility PatternRECTANGULAR SINGLE MOUNTING FACILITY
Center to Center Distance Between Mounting Facilities Parallel to Length0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Duty TypeCONTINUOUS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
5360-00-027-8469 INTERCHANGEABLE
Spring,helical,compression
5340-00-359-04391F23 INTERCHANGEABLE
Plunger,detent
Caterpillar Inc Div Caterpillar Defense
3408-00-463-2321 INTERCHANGEABLE
Machining Center,horizontal Spin
5342-01-120-9500 INTERCHANGEABLE
Snap
4820-01-199-7880283367-0001 ITEM 8 INTERCHANGEABLE
Valve,safety Relief
Marotta Controls Inc
4820-01-412-0279280041-0032 INTERCHANGEABLE
Valve,safety Relief
Marotta Controls Inc
5965-01-475-75403013331090 INTERCHANGEABLE
Microphone,dynamic
Creative Labs Inc
Cross-Reference Index
Part NumberManufacturer
SM-C-143770 PRIMARY Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA)
LPPTGX61-1 Emerson Electric Co White-Rodgers Div (USA)
MC1000 Te Connectivity Corporation (USA)
SM-C-143770 Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions (USA)
28004-1 Emerson Electric Co White-Rodgers Div (USA)
Related Parts
5360-00-027-8469INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5340-00-359-0439INTERCHANGEABLE
PLUNGER,DETENT
1F23
3408-00-463-2321INTERCHANGEABLE
MACHINING CENTER,HORIZONTAL SPIN
5342-01-120-9500INTERCHANGEABLE
SNAP
4820-01-199-7880INTERCHANGEABLE
VALVE,SAFETY RELIEF
283367-0001 ITEM 8
4820-01-412-0279INTERCHANGEABLE
VALVE,SAFETY RELIEF
280041-0032
5965-01-475-7540INTERCHANGEABLE
MICROPHONE,DYNAMIC
3013331090

Frequently Asked Questions

What is NSN 5945-00-259-6446?

NSN 5945-00-259-6446 is a Relay,electromagnetic, manufactured by Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir, classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-00-259-6446?

NSN 5945-00-259-6446 has 5 cross-referenced part numbers: SM-C-143770 (Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir), LPPTGX61-1 (Emerson Electric Co White-Rodgers Div), MC1000 (Te Connectivity Corporation), SM-C-143770 (Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions), 28004-1 (Emerson Electric Co White-Rodgers Div).

What NSN replaces 5945-00-259-6446?

There are 7 known substitutes for 5945-00-259-6446: 5360-00-027-8469, 5340-00-359-0439, 3408-00-463-2321 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SM-C-143770?

Key specifications for SM-C-143770: Pile-Up Main Contact Form Arrangement: 1A A; Mounting Facility Type and Quantity: 4 THREADED HOLE(S) SINGLE MOUNTING FACILITY; Thread Class: 2B SINGLE MOUNTING FACILITY; Overall Length: 1.297 INCHES MAXIMUM IN. 24 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-259-6446 still in active supply?

NSN 5945-00-259-6446 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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