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Technical Data Sheet
501B2281 ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The RELAY,THERMAL is a the manufacturer industrial component. Key specifications include overall_length: 3.250 INCHES NOMINAL IN, overall_diameter: 1.275 INCHES NOMINAL IN, contact_arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN, delay_time_in_seconds: 255.0 FIXED OPERATE MINIMUM AND 345.0 FIXED OPERATE MAXIMUM, environmental_protection: HERMETIC, terminal_type_and_quantity: 8 PIN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-502-3855, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
501B2281
NSN: 5945-00-502-3855
FSC: 5945
CAGE: 04435 — JETTRON PRODUCTS INC (USA)
SPECIFICATIONS
overall_length3.250 INCHES NOMINAL IN
overall_diameter1.275 INCHES NOMINAL IN
contact_arrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
delay_time_in_seconds255.0 FIXED OPERATE MINIMUM AND 345.0 FIXED OPERATE MAXIMUM
environmental_protectionHERMETIC
terminal_type_and_quantity8 PIN
heater_power_rating_in_watts5.0
mounting_facility_type_and_quantity1 OCTAL BASE PLUG-IN
contact_maximum_current_rating_in_amps3.0 AC
NSN5945-00-502-3855
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RELAY,THERMAL TITLE COMPONENT PN 501B2281 MFR RELAY,THERMAL
KEY FEATURES
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
TECHNICAL CHARACTERISTICS (FLIS)
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
OVERALL LENGTH3.250 INCHES NOMINAL IN
HEATER VOLTAGE RATING IN VOLTS26.5
HEATER POWER RATING IN WATTS5.0
TERMINAL TYPE AND QUANTITY8 PIN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
2281Interchangeable
interchangeable cross-reference
interchangeable
B2281Interchangeable
interchangeable cross-reference
interchangeable
C-2281Interchangeable
interchangeable cross-reference
interchangeable
451140Interchangeable
interchangeable cross-reference
interchangeable
400025Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 501B2281?
501B2281 is a RELAY,THERMAL.
What parts can replace 501B2281?
There are 5 known substitutes for 501B2281: 2281, B2281, C-2281 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 501B2281?
501B2281 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-502-3855. This indicates validated use in U.S. government and defense supply chains.
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