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Technical Data Sheet
3991AS320-2 ✓ 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

TERMINAL JUNCTION BLOCK,SECTIONA. Key specifications include block_type: CIRCUIT BREAKER, overall_width: 0.72 INCHES NOMINAL IN, overall_height: 0.63 INCHES NOMINAL IN, overall_length: 8.16 INCHES NOMINAL IN, voltage_rating: 300.0 VOLTS NOMINAL, mounting_method: PANEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5940-01-645-2312, 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
3991AS320-2
NSN: 5940-01-645-2312
FSC: 5940
CAGE: 1UX99 — MOLEX, LLC (USA)
SPECIFICATIONS
block_typeCIRCUIT BREAKER
overall_width0.72 INCHES NOMINAL IN
overall_height0.63 INCHES NOMINAL IN
overall_length8.16 INCHES NOMINAL IN
voltage_rating300.0 VOLTS NOMINAL
mounting_methodPANEL
terminal_designTERMINATING
special_featuresDESCRIPTION: TERMINAL BLOCK, DOUBLE ROW, 10POS; MOUNT TYPE: CHASSIS PANEL; CURRENT: 15A; NUMBER OF CIRCUITS: 10; COLOR: BLACK A
operating_temp_range-40.0 TO 120.0 CELSIUS DEGC
wire_size_accommodated14.0 AWG MINIMUM AND 22.0 AWG MAXIMUM
terminal_type_and_quantity10 SCREW
part_name_assigned_by_controlling_agency(INAVY) TERMINAL BLCK 10 POS; TERMINAL BLOCK 2 X 10
NSN5940-01-645-2312
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TERMINAL JUNCTION BLOCK,SECTIONA TITLE COMPONENT PN 3991AS320-2 MFR TERMINAL JUNCTION BLOC
KEY FEATURES
VOLTAGE RATING: 300.0 VOLTS NOMINAL
WIRE SIZE ACCOMMODATED: 14.0 AWG MINIMUM AND 22.0 AWG MAXIMUM
MOUNTING METHOD: PANEL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH8.16 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCY(INAVY) TERMINAL BLCK 10 POS; TERMINAL BLOCK 2 X 10
VOLTAGE RATING300.0 VOLTS NOMINAL
OVERALL WIDTH0.72 INCHES NOMINAL IN
WIRE SIZE ACCOMMODATED14.0 AWG MINIMUM AND 22.0 AWG MAXIMUM
SPECIAL FEATURESDESCRIPTION: TERMINAL BLOCK, DOUBLE ROW, 10POS; MOUNT TYPE: CHASSIS PANEL; CURRENT: 15A; NUMBER OF CIRCUITS: 10; COLOR: BLACK A
MOUNTING METHODPANEL
OVERALL HEIGHT0.63 INCHES NOMINAL IN
BLOCK TYPECIRCUIT BREAKER
TERMINAL DESIGNTERMINATING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
101444Interchangeable
interchangeable cross-reference
interchangeable
101404Interchangeable
interchangeable cross-reference
interchangeable
AD9813540Interchangeable
interchangeable cross-reference
interchangeable
150876Interchangeable
interchangeable cross-reference
interchangeable
M28748/8-B00G1AInterchangeable
interchangeable cross-reference
interchangeable
MIL-C-28748/8Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3991AS320-2?
3991AS320-2 is a TERMINAL JUNCTION BLOCK,SECTIONA.
What parts can replace 3991AS320-2?
There are 10 known substitutes for 3991AS320-2: 101444, 101404, AD9813540 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3991AS320-2?
3991AS320-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5940-01-645-2312. This indicates validated use in U.S. government and defense supply chains.
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