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Technical Data Sheet
B1539CHANGEB ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
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PRODUCT OVERVIEW

The RELAY,THERMAL is a the manufacturer industrial component. Key specifications include overall_length: 3.250 INCHES NOMINAL IN, overall_diameter: 1.187 INCHES NOMINAL IN, contact_arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN, delay_time_in_seconds: 135.0 FIXED OPERATE MINIMUM AND 165.0 FIXED OPERATE MAXIMUM, environmental_protection: HERMETIC, terminal_type_and_quantity: 4 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 5945-00-254-6260, 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
B1539CHANGEB
NSN: 5945-00-254-6260
FSC: 5945
CAGE: 58880 — MEGGITT (NEW HAMPSHIRE), INC (USA)
SPECIFICATIONS
overall_length3.250 INCHES NOMINAL IN
overall_diameter1.187 INCHES NOMINAL IN
contact_arrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
delay_time_in_seconds135.0 FIXED OPERATE MINIMUM AND 165.0 FIXED OPERATE MAXIMUM
environmental_protectionHERMETIC
terminal_type_and_quantity4 PIN
heater_power_rating_in_watts6.0
mounting_facility_type_and_quantity1 OCTAL BASE PLUG-IN
contact_maximum_current_rating_in_amps2.0 AC
NSN5945-00-254-6260
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RELAY,THERMAL TITLE COMPONENT PN B1539CHANGEB MFR RELAY,THERMAL
KEY FEATURES
CONTACT MAXIMUM VOLTAGE RATING IN VOLTS: 250.0 AC
DELAY TIME IN SECONDS: 135.0 FIXED OPERATE MINIMUM AND 165.0 FIXED OPERATE MAXIMUM
HEATER VOLTAGE RATING IN VOLTS: 115.0
CONTACT ARRANGEMENT: SINGLE POLE, SINGLE THROW, NORMALLY OPEN
ENVIRONMENTAL PROTECTION: HERMETIC
TERMINAL TYPE AND QUANTITY: 4 PIN
CONTACT MAXIMUM CURRENT RATING IN AMPS: 2.0 AC
TECHNICAL CHARACTERISTICS (FLIS)
CONTACT MAXIMUM VOLTAGE RATING IN VOLTS250.0 AC
DELAY TIME IN SECONDS135.0 FIXED OPERATE MINIMUM AND 165.0 FIXED OPERATE MAXIMUM
HEATER VOLTAGE RATING IN VOLTS115.0
CONTACT ARRANGEMENTSINGLE POLE, SINGLE THROW, NORMALLY OPEN
ENVIRONMENTAL PROTECTIONHERMETIC
OVERALL LENGTH3.250 INCHES NOMINAL IN
TERMINAL TYPE AND QUANTITY4 PIN
CONTACT MAXIMUM CURRENT RATING IN AMPS2.0 AC
HEATER POWER RATING IN WATTS6.0
OVERALL DIAMETER1.187 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
RL-1001-4Interchangeable
interchangeable cross-reference
interchangeable
A-810Interchangeable
interchangeable cross-reference
interchangeable
SM-D-337274-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B1539CHANGEB?
B1539CHANGEB is a RELAY,THERMAL.
What parts can replace B1539CHANGEB?
There are 3 known substitutes for B1539CHANGEB: RL-1001-4, A-810, SM-D-337274-4. Substitute compatibility should be verified for your specific system.
What is the NSN for B1539CHANGEB?
B1539CHANGEB is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-254-6260. This indicates validated use in U.S. government and defense supply chains.
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