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Technical Data Sheet
PartsTable / MRO / A81-78
A81-78 ✓ 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 RESISTOR,FIXED,COMPOSITION is a the manufacturer industrial component. Key specifications include body_style: RECTANGULAR W/MOUNTING HOLES, body_width: 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN, body_height: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN, body_length: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN, shaft_style: ROUND, SLOTTED, shaft_length: 0.030 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5905-00-106-1273, 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→ A81-78
NSN: 5905-00-106-1273
FSC: 5905
CAGE: 81535 — AERONAUTICAL COMMUNICATIONS EQUIPMENT INC (USA)
SPECIFICATIONS
body_styleRECTANGULAR W/MOUNTING HOLES
body_width0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
body_height0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
body_length0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
shaft_styleROUND, SLOTTED
shaft_length0.030 INCHES MAXIMUM IN
actuator_typeSINGLE SHAFT
body_diameter0.138 INCHES NOMINAL IN
cubic_measure0.007 CUBIC INCHES
overall_width3.031 INCHES NOMINAL IN
terminal_typeWIRE LEAD
inclosure_typeOPEN
NSN5905-00-106-1273
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RESISTOR,FIXED,COMPOSITION TITLE COMPONENT PN A81-78 MFR RESISTOR,FIXED,COMPOSI
KEY FEATURES
•
ELECTRICAL RESISTANCE: 15.000 KILOHMS
•
SPECIFICATION/STANDARD DATA: 81349-MIL-R-39008/2 GOVERNMENT SPECIFICATION
•
TEST DATA DOCUMENT: 81349-MIL-R-39008 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
STYLE DESIGNATOR: AXIAL TERMINAL EACH END
•
BODY DIAMETER: 0.138 INCHES NOMINAL IN
•
TERMINAL LENGTH: 1.500 INCHES NOMINAL IN
•
RELIABILITY INDICATOR: ESTABLISHED
•
CUBIC MEASURE: 0.007 CUBIC INCHES
TECHNICAL CHARACTERISTICS (FLIS)
ELECTRICAL RESISTANCE15.000 KILOHMS
SPECIFICATION/STANDARD DATA81349-MIL-R-39008/2 GOVERNMENT SPECIFICATION
TEST DATA DOCUMENT81349-MIL-R-39008 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
STYLE DESIGNATORAXIAL TERMINAL EACH END
BODY DIAMETER0.138 INCHES NOMINAL IN
TERMINAL LENGTH1.500 INCHES NOMINAL IN
RELIABILITY INDICATORESTABLISHED
CUBIC MEASURE0.007 CUBIC INCHES
BODY LENGTH0.375 INCHES NOMINAL IN
RELIABILITY FAILURE RATE LEVEL IN PERCENT0.001
VERIFIED SUBSTITUTES & CROSS-REFERENCES 38
5-115557-153Interchangeable
interchangeable cross-reference
interchangeable
RCR20G153JSInterchangeable
interchangeable cross-reference
interchangeable
RCR20G182JSInterchangeable
interchangeable cross-reference
interchangeable
K8419236Interchangeable
interchangeable cross-reference
interchangeable
K3321112Interchangeable
interchangeable cross-reference
interchangeable
3321112Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A81-78?
A81-78 is a RESISTOR,FIXED,COMPOSITION. It is classified as a MRO (MRO_GENERAL).
What parts can replace A81-78?
There are 38 known substitutes for A81-78: 5-115557-153, RCR20G153JS, RCR20G182JS and 35 more. Substitute compatibility should be verified for your specific system.
Is A81-78 still available?
A81-78 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026