PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SM-C-209473-3Relay,thermal

Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir · NSN 5945-00-331-2891 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-331-2891 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-331-2891. Primary manufacturer part number: SM-C-209473-3.
Features
  • Relay,thermal — FSC 5945
  • Heater Voltage Rating in Volts: 117.0
  • Contact Maximum Current Rating in Amps: 3.0 AC OR 3.0 DC
  • Heater Power Rating in Watts: 5.0
  • Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN
  • Delay Time in Seconds: 4.0 FIXED OPERATE AND RELEASE MINIMUM AND 45.0 FIXED OPERATE AND RELEASE MAXIMUM
  • Overall Diameter: 1.275 INCHES NOMINAL IN
  • Environmental Protection: HERMETIC
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,thermal, cataloged under National Stock Number 5945-00-331-2891, 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 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 8 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
NSN5945-00-331-2891
Primary Part NumberSM-C-209473-3
Item NameRelay,thermal
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerUs Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
StatusCANCELLED
Heater Voltage Rating in Volts117.0
Contact Maximum Current Rating in Amps3.0 AC OR 3.0 DC
Heater Power Rating in Watts5.0
Contact ArrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
Delay Time in Seconds4.0 FIXED OPERATE AND RELEASE MINIMUM AND 45.0 FIXED OPERATE AND RELEASE MAXIMUM
Overall Diameter1.275 INCHES NOMINAL IN
Environmental ProtectionHERMETIC
Contact Maximum Voltage Rating in Volts250.0 AC AND 150.0 DC
Mounting Facility Type and Quantity1 OCTAL BASE PLUG-IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5133-00-266-9469 INTERCHANGEABLE
Drill,twist
5975-00-395-9499SM-B-148594 INTERCHANGEABLE
Plate,switch
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4210-00-488-106211545 INTERCHANGEABLE
Disk,driving
Sachs-Boge of America
5120-00-596-9313HX4-501 INTERCHANGEABLE
Crimping Tool,terminal,hand
Daniels Manufacturing Corporation
1650-00-730-006711545 INTERCHANGEABLE
Stiffener,linear Actuating Cylin
Eaton Corp Dba Eaton Aerospace Jackson
3110-00-814-3127 INTERCHANGEABLE
Bearing,ball,annular
2520-00-971-18836J9828 INTERCHANGEABLE
Parts Kit,pump
Caterpillar Inc Div Caterpillar Defense
5330-01-053-7015 INTERCHANGEABLE
Seal,plain Encased
2805-01-104-046511-545 INTERCHANGEABLE
Bushing,connecting
Thermo King Corporation Dba Phoenix Global Distirbution.
3020-01-153-1620 INTERCHANGEABLE
Pulley,groove
Cross-Reference Index
Part NumberManufacturer
8105174 Us Army Aviation and Missile Command (USA)
115-45 Amperite Co Inc (USA)
B2105 Meggitt (new Hampshire), Inc (USA)
115N045 Amperite Co Inc (USA)
SM-C-209473-3 PRIMARY Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA)
823786B Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
BP431123 Lucent Technologies Inc Corporate Headquarters (USA)
P36300062 Entron Industries Limited Partnership Dba Entron Industries Property Div (USA)
T7621001PT12 Westinghouse Electric Corp (USA)
Related Parts
5133-00-266-9469INTERCHANGEABLE
DRILL,TWIST
5975-00-395-9499INTERCHANGEABLE
PLATE,SWITCH
SM-B-148594
4210-00-488-1062INTERCHANGEABLE
DISK,DRIVING
11545
5120-00-596-9313INTERCHANGEABLE
CRIMPING TOOL,TERMINAL,HAND
HX4-501
1650-00-730-0067INTERCHANGEABLE
STIFFENER,LINEAR ACTUATING CYLIN
11545
3110-00-814-3127INTERCHANGEABLE
BEARING,BALL,ANNULAR
2520-00-971-1883INTERCHANGEABLE
PARTS KIT,PUMP
6J9828
5330-01-053-7015INTERCHANGEABLE
SEAL,PLAIN ENCASED
2805-01-104-0465INTERCHANGEABLE
BUSHING,CONNECTING
11-545
3020-01-153-1620INTERCHANGEABLE
PULLEY,GROOVE
5330-01-311-5987INTERCHANGEABLE
GASKET
11545
4820-01-624-3494INTERCHANGEABLE
VALVE,CHECK
11545

Frequently Asked Questions

What is NSN 5945-00-331-2891?

NSN 5945-00-331-2891 is a Relay,thermal, 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 5945-00-331-2891?

NSN 5945-00-331-2891 has 9 cross-referenced part numbers: 8105174 (Us Army Aviation and Missile Command), 115-45 (Amperite Co Inc), B2105 (Meggitt (new Hampshire), Inc), 115N045 (Amperite Co Inc), SM-C-209473-3 (Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir) and 4 more.

What NSN replaces 5945-00-331-2891?

There are 12 known substitutes for 5945-00-331-2891: 5133-00-266-9469, 5975-00-395-9499, 4210-00-488-1062 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SM-C-209473-3?

Key specifications for SM-C-209473-3: Heater Voltage Rating in Volts: 117.0; Contact Maximum Current Rating in Amps: 3.0 AC OR 3.0 DC; Heater Power Rating in Watts: 5.0; Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-331-2891 still in active supply?

NSN 5945-00-331-2891 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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