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Technical Data Sheet
PartsTable / MRO / PC40Q1R8
PC40Q1R8 ✓ 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

CAPACITOR,VARIABLE,GLASS DIELECT. Key specifications include body_style: PISTON, body_length: 0.297 INCHES NOMINAL IN, thread_class: 2A A, bushing_shape: ROUND W/FLAT, bushing_width: 0.167 INCHES NOMINAL IN, bushing_length: 0.281 INCHES NOMINAL 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 5910-00-786-8786, 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→ PC40Q1R8
NSN: 5910-00-786-8786
FSC: 5910
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
body_stylePISTON
body_length0.297 INCHES NOMINAL IN
thread_class2A A
bushing_shapeROUND W/FLAT
bushing_width0.167 INCHES NOMINAL IN
bushing_length0.281 INCHES NOMINAL IN
inclosure_typeENCASED
bushing_diameter0.190 INCHES NOMINAL IN
overall_diameter0.312 INCHES NOMINAL IN
nominal_thread_size0.190 INCHES IN
adjustment_device_torque1.000 INCH-OUNCES MINIMUM AND 10.000 INCH-OUNCES MAXIMUM IN
nonderated_operating_temp-55.0 CELSIUS MINIMUM AND 150.0 CELSIUS MAXIMUM DEGC
NSN5910-00-786-8786
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,VARIABLE,GLASS DIELECT TITLE COMPONENT PN PC40Q1R8 MFR CAPACITOR,VARIABLE,GLA
KEY FEATURES
•
INSULATION DC RESISTANCE AT 25 DEG CELSIUS: 100.0 GIGOHMS
•
INCLOSURE TYPE: ENCASED
•
TEST DATA DOCUMENT: 81349-MIL-C-14409 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.).
•
CAPACITANCE DRIFT IN PICOFARADS: 0.01 SINGLE SECTION
•
TERMINAL TYPE AND QUANTITY: 1 WIRE LEAD
•
TEMP COEFFICIENT OF CAPACITANCE RANGE IN PPM PER DEG CELSIUS: +0.0 TO 50.0 SINGLE SECTION
•
BUSHING WIDTH: 0.167 INCHES NOMINAL IN
•
BODY STYLE: PISTON
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
INSULATION DC RESISTANCE AT 25 DEG CELSIUS100.0 GIGOHMS
INCLOSURE TYPEENCASED
TEST DATA DOCUMENT81349-MIL-C-14409 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.).
CAPACITANCE DRIFT IN PICOFARADS0.01 SINGLE SECTION
TERMINAL TYPE AND QUANTITY1 WIRE LEAD
TEMP COEFFICIENT OF CAPACITANCE RANGE IN PPM PER DEG CELSIUS+0.0 TO 50.0 SINGLE SECTION
BUSHING WIDTH0.167 INCHES NOMINAL IN
BODY STYLEPISTON
BUSHING DIAMETER0.190 INCHES NOMINAL IN
MOUNTING FACILITY SCREW THREAD SERIES DESIGNATORUNF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
GHC525Interchangeable
interchangeable cross-reference
interchangeable
PC40J4R5Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-14409/6Interchangeable
interchangeable cross-reference
interchangeable
562-053Interchangeable
interchangeable cross-reference
interchangeable
11-00310-007Interchangeable
interchangeable cross-reference
interchangeable
562-052Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PC40Q1R8?
PC40Q1R8 is a CAPACITOR,VARIABLE,GLASS DIELECT. It is classified as a MRO (MRO_GENERAL).
What parts can replace PC40Q1R8?
There are 21 known substitutes for PC40Q1R8: GHC525, PC40J4R5, MIL-PRF-14409/6 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PC40Q1R8?
PC40Q1R8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-786-8786. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026