PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

90581Relay,electromagnetic

Sigma Instruments Inc · NSN 5945-00-949-7372 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-949-7372 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-949-7372. Primary manufacturer part number: 90581.
Features
  • Relay,electromagnetic — FSC 5945
  • Winding Quantity: 1
  • Coil Quantity: 1
  • 1 verified cross-reference
  • Primary manufacturer: Sigma Instruments Inc
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,electromagnetic, cataloged under National Stock Number 5945-00-949-7372, 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 Sigma Instruments Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-949-7372
Primary Part Number90581
Item NameRelay,electromagnetic
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerSigma Instruments Inc
StatusACTIVE
Winding Quantity1
Coil Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5945-00-842-8721SGEE-EM-PD-133A INTERCHANGEABLE
Relay,electromagnetic
Air Force Lifecycle Management Center Electronic Components (aflcmc/ezss)
3820-01-246-58679058-1 INTERCHANGEABLE
Button Shield,earth
Little Beaver Inc
Cross-Reference Index
Part NumberManufacturer
90581 Sigma Instruments Inc (USA)
Related Parts
5945-00-842-8721INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
SGEE-EM-PD-133A
3820-01-246-5867INTERCHANGEABLE
BUTTON SHIELD,EARTH
9058-1

Frequently Asked Questions

What is NSN 5945-00-949-7372?

NSN 5945-00-949-7372 is a Relay,electromagnetic, manufactured by Sigma Instruments Inc, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-949-7372?

NSN 5945-00-949-7372 has 1 cross-referenced part number: 90581 (Sigma Instruments Inc).

What NSN replaces 5945-00-949-7372?

There are 2 known substitutes for 5945-00-949-7372: 5945-00-842-8721, 3820-01-246-5867. Verify interchangeability with system specifications before substitution.

What are the specifications of 90581?

Key specifications for 90581: Winding Quantity: 1; Coil Quantity: 1. 2 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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