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TN645B — POWER SUPPLY

✓ Government record, cited
— · PSU
PRODUCT OVERVIEW

TN645B: POWER SUPPLY.

The POWER SUPPLY is a the manufacturer power supply unit built for continuous operation in enterprise server and storage platforms. This part is cataloged in the U.S. Government catalog under NSN 6130-01-367-5736, 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
TN645B
NSN: 6130-01-367-5736
FSC: 6130 — Converters, Electrical, Nonrotating
CAGE: 93LG4 — BEACON TECHNOLOGY PARTNERS LLC (USA)
SPECIFICATIONS
NSN6130-01-367-5736
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 TN645B MFR OEM Platinum
KEY FEATURES
•
OUTPUT VOLTAGE RATING: -5.0 DC VOLTS NOMINAL SECOND POWER OUTPUT
•
INPUT VOLTAGE RATING: -48.0 DC VOLTS NOMINAL SINGLE OPERATING POWER RQMT
TYPICAL APPLICATIONS
  • Server power supply replacement (failed or degraded)
  • Redundant power upgrade for high-availability
  • Power capacity upgrade for GPU or expansion configurations
  • Hot-swap power maintenance in production environments
  • Spare inventory for break-fix operations
TECHNICAL CHARACTERISTICS
OUTPUT VOLTAGE RATING-5.0 DC VOLTS NOMINAL SECOND POWER OUTPUT
OUTPUT VOLTAGE RATING-48.0 DC VOLTS NOMINAL FIRST POWER OUTPUT
INPUT VOLTAGE RATING-48.0 DC VOLTS NOMINAL SINGLE OPERATING POWER RQMT
END ITEM IDENTIFICATIONDEFINITY 75 TELEPHONE SYSTEM
SUBSTITUTES & CROSS-REFERENCES 2
MP200038 ITEM 508Reference document
Same NSN cross-reference
Reference document — Secondary reference
645BReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is TN645B?
TN645B is a POWER SUPPLY.
What parts can replace TN645B?
There are 2 known substitutes for TN645B: MP200038 ITEM 508, 645B. Substitute compatibility should be verified for your specific system.
What is the NSN for TN645B?
TN645B is cataloged in the U.S. Government catalog under NSN 6130-01-367-5736. 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.