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Technical Data Sheet
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B278 ✓ Verified by PartsTable
— · COMPONENT
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 CONNECTOR ASSEMBLY,ELECTRICAL is a the manufacturer industrial component. Key specifications include material: PAPER FILTERING MEDIUM, body_height: 0.233 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN, design_type: NONREUSABLE, body_diameter: 3.812 INCHES NOMINAL IN, terminal_type: TAB, SOLDER LUG, flow_direction: OUTSIDE IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-01-054-3489, 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
B278
NSN: 5930-01-054-3489
FSC: 5930
CAGE: 90536 — LOCKHEED MARTIN CORP DBA LOCKHEED MARTIN DIV MST - EAGAN (USA)
SPECIFICATIONS
materialPAPER FILTERING MEDIUM
body_height0.233 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
design_typeNONREUSABLE
body_diameter3.812 INCHES NOMINAL IN
terminal_typeTAB, SOLDER LUG
flow_directionOUTSIDE IN
overall_length1.060 INCHES MAXIMUM IN
mounting_methodFLANGE AND UNTHREADED HOLE(S)
style_designatorCYLINDRICAL W/ INTEGRAL OUTER CASING
body_overall_length4.281 INCHES NOMINAL IN
nominal_thread_size0.812 INCHES IN
contact_adjustabilityDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
NSN5930-01-054-3489
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CONNECTOR ASSEMBLY,ELECTRICAL TITLE COMPONENT PN B278 MFR CONNECTOR ASSEMBLY,ELE
KEY FEATURES
•
CONTACT LOAD CURRENT RATING: 2.0 AMPERES RESISTIVE LOAD SINGLE VOLTAGE
•
CONTACT VOLTAGE RATING IN VOLTS: 28.0 DC AT SEA LEVEL SINGLE VOLTAGE
•
NONPILE-UP CONTACT ARRANGEMENT: 1 POLE, SINGLE THROW, BOTH POSITIONS MAINTAINED
•
UNTHREADED MOUNTING HOLE DIAMETER: 0.104 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
•
CONTACT STIMULUS RATING: 131.00 ACTUATION POINT MINIMUM DEGREES FAHRENHEIT AND 135.00 ACTUATION POINT MAXIMUM DEGREES FAHRENHEIT AND 4.00 DIFFERENTIAL POINT NOMINAL DEGREES FAHRENHEIT
•
CONTACT ADJUSTABILITY: DEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
•
CONTACT ACTION STIMULUS: INCREASE
•
MOUNTING FACILITY PATTERN: TWO POSITION IN-LINE
TECHNICAL CHARACTERISTICS (FLIS)
CONTACT LOAD CURRENT RATING2.0 AMPERES RESISTIVE LOAD SINGLE VOLTAGE
CONTACT VOLTAGE RATING IN VOLTS28.0 DC AT SEA LEVEL SINGLE VOLTAGE
NONPILE-UP CONTACT ARRANGEMENT1 POLE, SINGLE THROW, BOTH POSITIONS MAINTAINED
UNTHREADED MOUNTING HOLE DIAMETER0.104 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
CONTACT STIMULUS RATING131.00 ACTUATION POINT MINIMUM DEGREES FAHRENHEIT AND 135.00 ACTUATION POINT MAXIMUM DEGREES FAHRENHEIT AND 4.00 DIFFERENTIAL POINT NOMINAL DEGREES FAHRENHEIT
CONTACT ADJUSTABILITYDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
CONTACT ACTION STIMULUSINCREASE
MOUNTING FACILITY PATTERNTWO POSITION IN-LINE
BODY HEIGHT0.233 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
MOUNTING METHODFLANGE AND UNTHREADED HOLE(S)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
8065BInterchangeable
interchangeable cross-reference
interchangeable
990067F1Interchangeable
interchangeable cross-reference
interchangeable
LH9814Interchangeable
interchangeable cross-reference
interchangeable
B278Interchangeable
interchangeable cross-reference
interchangeable
7921714-00Interchangeable
interchangeable cross-reference
interchangeable
7921714-00 90536Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B278?
B278 is a CONNECTOR ASSEMBLY,ELECTRICAL.
What parts can replace B278?
There are 9 known substitutes for B278: 8065B, 990067F1, LH9814 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B278?
B278 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-01-054-3489. 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