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DB7821 — CAPACITOR,FIXED,ELECTROLYTIC

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

DB7821: CAPACITOR,FIXED,ELECTROLYTIC.

The CAPACITOR,FIXED,ELECTROLYTIC is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include material: COPPER ALLOY OVERALL, corner_shape: SQUARE INSIDE RIGHT CORNER, flange_width: 0.1250 INCHES NOMINAL IN, overall_length: 1.4375 INCHES NOMINAL IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, body_inside_diameter: 0.7500 INCHES MINIMUM AND 0.7510 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-338-7422, 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
DB7821
NSN: 3120-00-338-7422
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 81601 — NORFOLK NAVAL SHIPYARD (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
corner_shapeSQUARE INSIDE RIGHT CORNER
flange_width0.1250 INCHES NOMINAL IN
overall_length1.4375 INCHES NOMINAL IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter0.7500 INCHES MINIMUM AND 0.7510 INCHES MAXIMUM IN
body_outside_diameter1.0010 INCHES MINIMUM AND 1.0020 INCHES MAXIMUM IN
flange_outside_diameter1.1825 INCHES MINIMUM AND 1.1975 INCHES MAXIMUM IN
lubricant_accommodation_styleGROOVED SINGLE LOOP
antirotation/lubrication_type_and_quantity1 HOLE
NSN3120-00-338-7422
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: DB7821 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CORNER SHAPE: SQUARE INSIDE RIGHT CORNER
•
FLANGE OUTSIDE DIAMETER: 1.1825 INCHES MINIMUM AND 1.1975 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 1.0010 INCHES MINIMUM AND 1.0020 INCHES MAXIMUM IN
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
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPESQUARE LEFT FLANGE BODY CORNER
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE INSIDE LEFT CORNER
FLANGE OUTSIDE DIAMETER1.1825 INCHES MINIMUM AND 1.1975 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER1.0010 INCHES MINIMUM AND 1.0020 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
OVERALL LENGTH1.4375 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 5
LN24027Reference document
Same NSN cross-reference
Reference document — Secondary reference
75B3833Reference document
Same NSN cross-reference
Reference document — Secondary reference
7821Reference document
Same NSN cross-reference
Reference document — Secondary reference
H75B3833Reference document
Same NSN cross-reference
Reference document — Secondary reference
24027Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is DB7821?
DB7821 is a CAPACITOR,FIXED,ELECTROLYTIC.
What parts can replace DB7821?
There are 5 known substitutes for DB7821: LN24027, 75B3833, 7821 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for DB7821?
DB7821 is cataloged in the U.S. Government catalog under NSN 3120-00-338-7422. This indicates validated use in U.S. government and defense supply chains.
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