PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

501B2281Relay,thermal

Jettron Products Inc · NSN 5945-00-502-3855 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-502-3855 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-502-3855. Primary manufacturer part number: 501B2281.
Features
  • Relay,thermal — FSC 5945
  • Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN
  • Mounting Facility Type and Quantity: 1 OCTAL BASE PLUG-IN
  • Environmental Protection: HERMETIC
  • Delay Time in Seconds: 255.0 FIXED OPERATE MINIMUM AND 345.0 FIXED OPERATE MAXIMUM
  • Overall Diameter: 1.275 INCHES NOMINAL IN
  • Contact Maximum Voltage Rating in Volts: 450.0 AC
  • Heater Voltage Rating in Volts: 26.5
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,thermal, cataloged under National Stock Number 5945-00-502-3855, 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 Jettron Products Inc. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-502-3855
Primary Part Number501B2281
Item NameRelay,thermal
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerJettron Products Inc
StatusACTIVE
Contact ArrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
Mounting Facility Type and Quantity1 OCTAL BASE PLUG-IN
Environmental ProtectionHERMETIC
Delay Time in Seconds255.0 FIXED OPERATE MINIMUM AND 345.0 FIXED OPERATE MAXIMUM
Overall Diameter1.275 INCHES NOMINAL IN
Contact Maximum Voltage Rating in Volts450.0 AC
Heater Voltage Rating in Volts26.5
Heater Power Rating in Watts5.0
Terminal Type and Quantity8 PIN
Contact Maximum Current Rating in Amps3.0 AC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5360-00-291-11802281 INTERCHANGEABLE
Spring,helical,compression
Eaton Aerospace, Llc Dba Jackson South
5330-01-133-4782B2281 INTERCHANGEABLE
Gasket
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
3040-01-283-8447400025 INTERCHANGEABLE
Lever,manual Control
Niantic Tool, Inc. Dba Niantic Tool Co
Cross-Reference Index
Part NumberManufacturer
501B2281 Jettron Products Inc (USA)
B2281 Meggitt (new Hampshire), Inc (USA)
Related Parts
5360-00-291-1180INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
2281
5330-01-133-4782INTERCHANGEABLE
GASKET
B2281
3040-01-283-8447INTERCHANGEABLE
LEVER,MANUAL CONTROL
400025

Frequently Asked Questions

What is NSN 5945-00-502-3855?

NSN 5945-00-502-3855 is a Relay,thermal, manufactured by Jettron Products Inc, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-502-3855?

NSN 5945-00-502-3855 has 2 cross-referenced part numbers: 501B2281 (Jettron Products Inc), B2281 (Meggitt (new Hampshire), Inc).

What NSN replaces 5945-00-502-3855?

There are 3 known substitutes for 5945-00-502-3855: 5360-00-291-1180, 5330-01-133-4782, 3040-01-283-8447. Verify interchangeability with system specifications before substitution.

What are the specifications of 501B2281?

Key specifications for 501B2281: Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN; Mounting Facility Type and Quantity: 1 OCTAL BASE PLUG-IN; Environmental Protection: HERMETIC; Delay Time in Seconds: 255.0 FIXED OPERATE MINIMUM AND 345.0 FIXED OPERATE MAXIMUM. 11 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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