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Technical Data Sheet
PartsTable / COMPONENT / 31-3B
31-3B ✓ Verified by PartsTable
— · PSU
WHAT YOU NEED TO KNOW
Always quote matching pair — mixed wattage causes throttling Platinum/Titanium = higher efficiency = lower power cost over time
AC or DC input? Verify customer site power
PRODUCT OVERVIEW

The MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include material: STEEL, overall_width: 3.140 INCHES NOMINAL IN, overall_height: 2.880 INCHES NOMINAL IN, overall_length: 4.880 INCHES NOMINAL IN, features_provided: OVER VOLTAGE PROTECTOR AND INPUT TO OUTPUT ISOLATION, input_voltage_rating: 25.0 DC VOLTS MINIMUM AND 36.0 DC VOLTS MAXIMUM SINGLE OPERATING POWER RQMT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6130-01-025-1537, 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
31-3B
NSN: 6130-01-025-1537
FSC: 6130
CAGE: 08748 — ELDEC AEROSPACE CORP (USA)
SPECIFICATIONS
materialSTEEL
overall_width3.140 INCHES NOMINAL IN
overall_height2.880 INCHES NOMINAL IN
overall_length4.880 INCHES NOMINAL IN
features_providedOVER VOLTAGE PROTECTOR AND INPUT TO OUTPUT ISOLATION
input_voltage_rating25.0 DC VOLTS MINIMUM AND 36.0 DC VOLTS MAXIMUM SINGLE OPERATING POWER RQMT
input_connection_typeSCREW SINGLE OPERATING POWER RQMT
output_current_rating500.0 DC AMPERES NOMINAL SINGLE POWER OUTPUT
output_voltage_rating20.0 DC KILOVOLTS NOMINAL SINGLE POWER OUTPUT
output_connection_typeTHREADED STUD AND SCREW SINGLE POWER OUTPUT
end_item_identificationSNAP-ON NO. 131A BRAKE SPRING PLIERS A
environmental_protectionFUNGUS PROOF
NSN6130-01-025-1537
COMPONENT DIAGRAM
PULL TAB AIRFLOW —W PLATINUM 100-240V~ 50/60Hz OEM BACKPLANE CONN ~200 mm HOT-PLUG POWER SUPPLY | —W | Platinum AC input 100-240V | Redundant pair required | Match wattage in same chassis TITLE PSU —W PN 31-3B MFR OEM Platinum
KEY FEATURES
•
ELECTRICAL POWER SOURCE RELATIONSHIP: OPERATING
•
FEATURES PROVIDED: OVER VOLTAGE PROTECTOR AND INPUT TO OUTPUT ISOLATION
•
OUTPUT CONNECTION TYPE: THREADED STUD AND SCREW SINGLE POWER OUTPUT
•
INPUT CONNECTION QUANTITY: 2 SINGLE OPERATING POWER RQMT
•
OUTPUT CURRENT RATING: 500.0 DC AMPERES NOMINAL SINGLE POWER OUTPUT
•
OUTPUT CONNECTION QUANTITY: 2 SINGLE POWER OUTPUT
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONAN/APQ-158; F-4 (PHANTOM II)
ELECTRICAL POWER SOURCE RELATIONSHIPOPERATING
FEATURES PROVIDEDOVER VOLTAGE PROTECTOR AND INPUT TO OUTPUT ISOLATION
OUTPUT CONNECTION TYPETHREADED STUD AND SCREW SINGLE POWER OUTPUT
INPUT CONNECTION QUANTITY2 SINGLE OPERATING POWER RQMT
OUTPUT CURRENT RATING500.0 DC AMPERES NOMINAL SINGLE POWER OUTPUT
OVERALL HEIGHT2.880 INCHES NOMINAL IN
OUTPUT CONNECTION QUANTITY2 SINGLE POWER OUTPUT
OUTPUT VOLTAGE RATING20.0 DC KILOVOLTS NOMINAL SINGLE POWER OUTPUT
OPERATING AMBIENT TEMP RANGE-55.0 TO 85.0 CELSIUS DEGC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
303Upgraded Successor
successor cross-reference
successor
875583-1Upgraded Successor
successor cross-reference
successor
580008Interchangeable
interchangeable cross-reference
interchangeable
167803-25Interchangeable
interchangeable cross-reference
interchangeable
167802-03Interchangeable
interchangeable cross-reference
interchangeable
31-3BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31-3B?
31-3B is a MICROCIRCUIT,DIGITAL.
What parts can replace 31-3B?
There are 8 known substitutes for 31-3B: 303, 875583-1, 580008 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 31-3B?
31-3B is cataloged in the Federal Logistics Information System (FLIS) under NSN 6130-01-025-1537. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026