PartsTable
Technical Data Sheet
JMC3957 ✓ 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,AIR DIELECTRI. Key specifications include body_style: PISTON, body_length: 0.296 INCHES NOMINAL IN, thread_class: 2A A, bushing_shape: ROUND, bushing_length: 0.203 INCHES NOMINAL IN, inclosure_type: ENCASED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-954-0522, 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 JMC3957
NSN: 5910-00-954-0522
FSC: 5910
CAGE: 91293 — KNOWLES CAZENOVIA, INC. DIV JOHANSON MANUFACTURING (USA)
SPECIFICATIONS
body_stylePISTON
body_length0.296 INCHES NOMINAL IN
thread_class2A A
bushing_shapeROUND
bushing_length0.203 INCHES NOMINAL IN
inclosure_typeENCASED
overall_length0.499 INCHES NOMINAL IN
terminal_length0.109 INCHES NOMINAL IN
bushing_diameter0.234 INCHES NOMINAL IN
overall_diameter0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
nominal_thread_size0.234 INCHES IN
tuning_characteristicSTRAIGHT LINE CAPACITY SINGLE SECTION
NSN5910-00-954-0522
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,VARIABLE,AIR DIELECTRI TITLE COMPONENT PN JMC3957 MFR CAPACITOR,VARIABLE,AIR
KEY FEATURES
THREAD QUANTITY PER INCH: 64
TERMINAL TYPE AND QUANTITY: 1 TURRET
NONDERATED OPERATING TEMP: -65.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
INCLOSURE TYPE: ENCASED
TEMP COEFFICIENT OF CAPACITANCE IN PPM PER DEG CELSIUS: 0.0 SINGLE SECTION
ADJUSTMENT DEVICE TORQUE: 1.000 INCH-OUNCES MINIMUM AND 5.000 INCH-OUNCES MAXIMUM IN
MOUNTING FACILITY SCREW THREAD SERIES DESIGNATOR: UNS
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)
THREAD QUANTITY PER INCH64
OVERALL LENGTH0.499 INCHES NOMINAL IN
TERMINAL TYPE AND QUANTITY1 TURRET
NONDERATED OPERATING TEMP-65.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
INCLOSURE TYPEENCASED
TEMP COEFFICIENT OF CAPACITANCE IN PPM PER DEG CELSIUS0.0 SINGLE SECTION
ADJUSTMENT DEVICE TORQUE1.000 INCH-OUNCES MINIMUM AND 5.000 INCH-OUNCES MAXIMUM IN
MOUNTING FACILITY SCREW THREAD SERIES DESIGNATORUNS
TEST DATA DOCUMENT00724-11-00273-002 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)
CAPACITANCE RANGE IN PICOFARADS+0.8 TO 10.0 SINGLE SECTION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
3957Interchangeable
interchangeable cross-reference
interchangeable
269-2004-00Interchangeable
interchangeable cross-reference
interchangeable
9162Interchangeable
interchangeable cross-reference
interchangeable
D2906-4Interchangeable
interchangeable cross-reference
interchangeable
3B7738Interchangeable
interchangeable cross-reference
interchangeable
35-7260Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is JMC3957?
JMC3957 is a CAPACITOR,VARIABLE,AIR DIELECTRI. It is classified as a MRO (MRO_GENERAL).
What parts can replace JMC3957?
There are 13 known substitutes for JMC3957: 3957, 269-2004-00, 9162 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for JMC3957?
JMC3957 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5910-00-954-0522. This indicates validated use in U.S. government and defense supply chains.
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