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Technical Data Sheet
900J439 ✓ Verified by PartsTable
· MRO · MRO_GENERAL
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 FUSE UNIT ASSEMBLY is a the manufacturer industrial component. Key specifications include special_features: AMBIENT TEMP. 50 DEGREES C,INSTANTANEOUS TRIP RANGE 125-350 AMPS, frequency_in_hertz: 60.0 ALL LOCATIONS, criticality_code_justification: ZZZY, general_characteristics_item_description: CIR.

BRK. FUSE UNIT,450 VOLTS,15-25 AMPS.,FOR AQB-A101., maximum_continuous_load_current_rating_per_pole: 25.0 AMPERES AC ALL LOCATIONS, operating_voltage_type_and_rating_per_pole_in_volts: 150.0 AC ALL LOCATIONS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5925-01-234-3115, 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
MRO MRO_GENERAL 900J439
NSN: 5925-01-234-3115
FSC: 5925
CAGE: 79500 — WESTINGHOUSE ELECTRIC CORP (USA)
SPECIFICATIONS
pole_quantity3
special_featuresAMBIENT TEMP. 50 DEGREES C,INSTANTANEOUS TRIP RANGE 125-350 AMPS
frequency_in_hertz60.0 ALL LOCATIONS
criticality_code_justificationZZZY
general_characteristics_item_descriptionCIR. BRK. FUSE UNIT,450 VOLTS,15-25 AMPS.,FOR AQB-A101.
maximum_continuous_load_current_rating_per_pole25.0 AMPERES AC ALL LOCATIONS
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
operating_voltage_type_and_rating_per_pole_in_volts150.0 AC ALL LOCATIONS
maximum_interrupting_capacity_current_type_and_rating_per_pole_in_amps500.0 AC ALL LOCATIONS
NSN5925-01-234-3115
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FUSE UNIT ASSEMBLY TITLE COMPONENT PN 900J439 MFR FUSE UNIT ASSEMBLY
KEY FEATURES
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
POLE QUANTITY: 3
MAXIMUM CONTINUOUS LOAD CURRENT RATING PER POLE: 25.0 AMPERES AC ALL LOCATIONS
MAXIMUM INTERRUPTING CAPACITY CURRENT TYPE AND RATING PER POLE IN AMPS: 500.0 AC ALL LOCATIONS
CRITICALITY CODE JUSTIFICATION: ZZZY
FREQUENCY IN HERTZ: 60.0 ALL LOCATIONS
OPERATING VOLTAGE TYPE AND RATING PER POLE IN VOLTS: 150.0 AC ALL LOCATIONS
TECHNICAL CHARACTERISTICS (FLIS)
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
POLE QUANTITY3
MAXIMUM CONTINUOUS LOAD CURRENT RATING PER POLE25.0 AMPERES AC ALL LOCATIONS
MAXIMUM INTERRUPTING CAPACITY CURRENT TYPE AND RATING PER POLE IN AMPS500.0 AC ALL LOCATIONS
CRITICALITY CODE JUSTIFICATIONZZZY
SPECIAL FEATURESAMBIENT TEMP. 50 DEGREES C,INSTANTANEOUS TRIP RANGE 125-350 AMPS
FREQUENCY IN HERTZ60.0 ALL LOCATIONS
OPERATING VOLTAGE TYPE AND RATING PER POLE IN VOLTS150.0 AC ALL LOCATIONS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
375D413G12Interchangeable
interchangeable cross-reference
interchangeable
321-7303507 ITEM NO 9Interchangeable
interchangeable cross-reference
interchangeable
MIL-C-17361/4Interchangeable
interchangeable cross-reference
interchangeable
458D509G13Interchangeable
interchangeable cross-reference
interchangeable
80048005 REV.D ITEM 21Interchangeable
interchangeable cross-reference
interchangeable
900J439Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 900J439?
900J439 is a FUSE UNIT ASSEMBLY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 900J439?
There are 11 known substitutes for 900J439: 375D413G12, 321-7303507 ITEM NO 9, MIL-C-17361/4 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 900J439?
900J439 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5925-01-234-3115. This indicates validated use in U.S. government and defense supply chains.
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