PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1551AS249-1Relay,electromagnetic

Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier · NSN 5945-01-311-6729 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-01-311-6729 — this item is cataloged by the U.S. Government under National Stock Number 5945-01-311-6729. Primary manufacturer part number: 1551AS249-1.
Features
  • Relay,electromagnetic — FSC 5945
  • Purpose for Which Designed: GENERAL
  • Duty Type: CONTINUOUS
  • Winding Quantity: 1
  • Frequency in Hertz: 50.0 MINIMUM AND 60.0 MAXIMUM
  • Coil Quantity: 1
  • Cubic Measure: 12.203 CUBIC INCHES
  • Storage Type: GENERAL PURPOSE WAREHOUSE
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-01-311-6729, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 14 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-01-311-6729
Primary Part Number1551AS249-1
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerNaval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
StatusACTIVE
Purpose for Which DesignedGENERAL
Duty TypeCONTINUOUS
Winding Quantity1
Frequency in Hertz50.0 MINIMUM AND 60.0 MAXIMUM
Coil Quantity1
Cubic Measure12.203 CUBIC INCHES
Storage TypeGENERAL PURPOSE WAREHOUSE
Mounting Facility Type and Quantity1 PLUG-IN TERMINAL(S) SINGLE MOUNTING FACILITY
Nonpile-Up Main Contact Arrangement2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY
Operating Voltage Rating and Type at Specified Temp120.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
Environmental ProtectionDUSTPROOF
Fragility FactorMODERATELY RUGGED
Main Contact Load Current Rating at Maximum Rated Voltage10.0 AMPERES AC RESISTIVE LOAD
Terminal Type and Quantity8 STANDARD TUBE BASE ALL FUNCTIONS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5945-01-314-95271551AS249-4 INTERCHANGEABLE
Relay,electromagnetic
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
Cross-Reference Index
Part NumberManufacturer
PAR2B110 Crouzet Corporation (USA)
390AB300-A0200A Cramer Co Division of Chestnut Group Inc (USA)
1551AS249-1 PRIMARY Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
Related Parts
5945-01-314-9527INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
1551AS249-4

Frequently Asked Questions

What is NSN 5945-01-311-6729?

NSN 5945-01-311-6729 is a Relay,electromagnetic, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-01-311-6729?

NSN 5945-01-311-6729 has 3 cross-referenced part numbers: PAR2B110 (Crouzet Corporation), 390AB300-A0200A (Cramer Co Division of Chestnut Group Inc), 1551AS249-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).

What NSN replaces 5945-01-311-6729?

There is 1 known substitute for 5945-01-311-6729: 5945-01-314-9527. Verify interchangeability with system specifications before substitution.

What are the specifications of 1551AS249-1?

Key specifications for 1551AS249-1: Purpose for Which Designed: GENERAL; Duty Type: CONTINUOUS; Winding Quantity: 1; Frequency in Hertz: 50.0 MINIMUM AND 60.0 MAXIMUM. 18 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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