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M3291-DB — BATTERY POWER SUPPLY

✓ Government record, cited
— · PSU
PRODUCT OVERVIEW

M3291-DB: BATTERY POWER SUPPLY.

The BATTERY POWER SUPPLY is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. This part is cataloged in the U.S. Government catalog under NSN 4820-01-397-5794, 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
M3291-DB
NSN: 4820-01-397-5794
FSC: 4820 — Valves, Nonpowered
CAGE: 0ASY6 — DERBYSHIRE MARINE PRODUCTS, LLC DBA DERBYSHIRE MARINE PRODUCTS LLC (USA)
SPECIFICATIONS
NSN4820-01-397-5794
COMPONENT DIAGRAM
PULL TAB AIRFLOW —W PLATINUM 100-240V~ 50/60Hz OEM BACKPLANE CONN ~200 mm HOT-PLUG POWER SUPPLY | —W | Platinum AC input 100-240V | Redundant pair required | Match wattage in same chassis TITLE PSU —W PN M3291-DB MFR OEM Platinum
KEY FEATURES
•
STYLE DESIGNATOR: PLAIN THREADED
•
NOMINAL THREAD SIZE: 4.375 INCHES SINGLE THREADED PORTION IN
•
THREAD QUANTITY PER INCH: 12 SINGLE THREADED PORTION
•
THREAD SERIES DESIGNATOR: UN SINGLE THREADED PORTION
•
SEATING SURFACE SHAPE: ANGULAR
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
OVERALL HEIGHT0.625 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN THREADED
NOMINAL THREAD SIZE4.375 INCHES SINGLE THREADED PORTION IN
THREAD QUANTITY PER INCH12 SINGLE THREADED PORTION
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
SEATING SURFACE SHAPEANGULAR
SUBSTITUTES & CROSS-REFERENCES 1
M3291Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M3291-DB?
M3291-DB is a BATTERY POWER SUPPLY.
What parts can replace M3291-DB?
There is 1 known substitute for M3291-DB: M3291. Substitute compatibility should be verified for your specific system.
What is the NSN for M3291-DB?
M3291-DB is cataloged in the U.S. Government catalog under NSN 4820-01-397-5794. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.