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Technical Data Sheet
501B-2109 ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
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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, special_features: 60.0 TO 100.0 SEC RELEASE TIME, contact_arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN, delay_time_in_seconds: 185.0 ADJUSTABLE OPERATE MINIMUM AND 242.0 ADJUSTABLE OPERATE MAXIMUM, environmental_protection: HERMETIC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-249-9776, 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
501B-2109
NSN: 5945-00-249-9776
FSC: 5945
CAGE: 04435 — JETTRON PRODUCTS INC (USA)
SPECIFICATIONS
overall_length3.250 INCHES NOMINAL IN
overall_diameter1.275 INCHES NOMINAL IN
special_features60.0 TO 100.0 SEC RELEASE TIME
contact_arrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
delay_time_in_seconds185.0 ADJUSTABLE OPERATE MINIMUM AND 242.0 ADJUSTABLE 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
NSN5945-00-249-9776
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RELAY,THERMAL TITLE COMPONENT PN 501B-2109 MFR RELAY,THERMAL
KEY FEATURES
OVERALL DIAMETER: 1.275 INCHES NOMINAL IN
DELAY TIME IN SECONDS: 185.0 ADJUSTABLE OPERATE MINIMUM AND 242.0 ADJUSTABLE OPERATE MAXIMUM
ENVIRONMENTAL PROTECTION: HERMETIC
HEATER POWER RATING IN WATTS: 5.0
HEATER VOLTAGE RATING IN VOLTS: 117.0
CONTACT MAXIMUM VOLTAGE RATING IN VOLTS: 450.0 AC
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH3.250 INCHES NOMINAL IN
OVERALL DIAMETER1.275 INCHES NOMINAL IN
DELAY TIME IN SECONDS185.0 ADJUSTABLE OPERATE MINIMUM AND 242.0 ADJUSTABLE OPERATE MAXIMUM
ENVIRONMENTAL PROTECTIONHERMETIC
HEATER POWER RATING IN WATTS5.0
HEATER VOLTAGE RATING IN VOLTS117.0
SPECIAL FEATURES60.0 TO 100.0 SEC RELEASE TIME
CONTACT MAXIMUM VOLTAGE RATING IN VOLTS450.0 AC
TERMINAL TYPE AND QUANTITY8 PIN
MOUNTING FACILITY TYPE AND QUANTITY1 OCTAL BASE PLUG-IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
877026Interchangeable
interchangeable cross-reference
interchangeable
EN-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 501B-2109?
501B-2109 is a RELAY,THERMAL.
What parts can replace 501B-2109?
There are 2 known substitutes for 501B-2109: 877026, EN-4. Substitute compatibility should be verified for your specific system.
What is the NSN for 501B-2109?
501B-2109 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5945-00-249-9776. This indicates validated use in U.S. government and defense supply chains.
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