PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A2.81Relay,thermal

Schneider Electric Usa, Inc. · NSN 5945-00-426-8377 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-426-8377 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-426-8377. Primary manufacturer part number: A2.81.
Features
  • Relay,thermal — FSC 5945
  • Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S)
  • 2 verified cross-references
  • Primary manufacturer: Schneider Electric Usa, Inc.
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,thermal, cataloged under National Stock Number 5945-00-426-8377, 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 Schneider Electric Usa, Inc.. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5945-00-426-8377
Primary Part NumberA2.81
Item NameRelay,thermal
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerSchneider Electric Usa, Inc.
StatusCANCELLED
Contact ArrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S)
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5965-00-090-7451701012-300 INTERCHANGEABLE
Holder,handset
Dynalec Corporation
2925-00-328-2018 INTERCHANGEABLE
Spark Plug
5950-00-501-2039278-0398-010 INTERCHANGEABLE
Transformer,radio Frequency
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5950-00-517-8812278-0398-011 INTERCHANGEABLE
Transformer,radio Frequency
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5355-00-818-0884A281 INTERCHANGEABLE
Knob
Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc
3040-01-133-79719321C1001-47 INTERCHANGEABLE
Shaft,straight
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
5355-01-161-2163 INTERCHANGEABLE
Knob
5330-01-352-1997A/281 INTERCHANGEABLE
Gasket
O. E. M. Controls, Inc. Dba Oem Controls Inc
5355-01-359-8501A281 INTERCHANGEABLE
Knob
Henrici Controls Corporation
5340-01-616-2403A-281 INTERCHANGEABLE
Bracket,mounting
Amron International Inc
Cross-Reference Index
Part NumberManufacturer
A2.81 PRIMARY Schneider Electric Usa, Inc. (USA)
A2-81 Schneider Electric Usa, Inc. (USA)
Related Parts
5965-00-090-7451INTERCHANGEABLE
HOLDER,HANDSET
701012-300
2925-00-328-2018INTERCHANGEABLE
SPARK PLUG
5950-00-501-2039INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
278-0398-010
5950-00-517-8812INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
278-0398-011
5355-00-818-0884INTERCHANGEABLE
KNOB
A281
3040-01-133-7971INTERCHANGEABLE
SHAFT,STRAIGHT
9321C1001-47
5355-01-161-2163INTERCHANGEABLE
KNOB
5330-01-352-1997INTERCHANGEABLE
GASKET
A/281
5355-01-359-8501INTERCHANGEABLE
KNOB
A281
5340-01-616-2403INTERCHANGEABLE
BRACKET,MOUNTING
A-281

Frequently Asked Questions

What is NSN 5945-00-426-8377?

NSN 5945-00-426-8377 is a Relay,thermal, manufactured by Schneider Electric Usa, Inc., classified under FSC 5945 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5945-00-426-8377?

NSN 5945-00-426-8377 has 2 cross-referenced part numbers: A2.81 (Schneider Electric Usa, Inc.), A2-81 (Schneider Electric Usa, Inc.).

What NSN replaces 5945-00-426-8377?

There are 10 known substitutes for 5945-00-426-8377: 5965-00-090-7451, 2925-00-328-2018, 5950-00-501-2039 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A2.81?

Key specifications for A2.81: Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN; Overall Height: 0.719 INCHES NOMINAL IN; Overall Length: 1.344 INCHES NOMINAL IN; Overall Width: 0.469 INCHES NOMINAL IN. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5945-00-426-8377 still in active supply?

NSN 5945-00-426-8377 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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