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21C — IBM 1725W AC POWER SUPPLY

✓ Government record, cited
— · POWER_SUPPLY · HOTPLUG_PSU
PRODUCT OVERVIEW

21C: IBM 1725W AC POWER SUPPLY.

The IBM 1725W AC 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 5975-00-188-1164, 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
POWER_SUPPLY→ HOTPLUG_PSU→ 21C
NSN: 5975-00-188-1164
NIINs: 001881164, 002301195, 002600447, 005391970, 006501202, 013151973, 014200677, 016534178
FSC: 5975 — Electrical Hardware and Supplies
CAGE: 76655 — PORTER H K CO INC ELECTRICAL DIV AMBRIDGE WORKS (USA)
SPECIFICATIONS
Wattage1725W
NSN5975-00-188-1164
COMPONENT DIAGRAM
PULL TAB AIRFLOW 1725W PLATINUM 100-240V~ 50/60Hz OEM BACKPLANE CONN ~200 mm HOT-PLUG POWER SUPPLY | 1725W | Platinum AC input 100-240V | Redundant pair required | Match wattage in same chassis TITLE PSU 1725W PN 21C MFR OEM Platinum
KEY FEATURES
•
1725W Power Rating
•
MOUNTING HOLE QUANTITY: 1
•
OPENING QUANTITY: 2
•
GANG QUANTITY: 1
•
CENTER TO CENTER VERTICAL DISTANCE BETWEEN OPENINGS: 1.531 INCHES NOMINAL IN
•
INSULATING ADAPTER: NOT INCLUDED
•
MATERIAL THICKNESS: 0.073 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: NATURAL FINISH AND ZINC OR CADMIUM PLATED STEEL MATERIAL AND II TYPE
•
LENGTH: 4.000 INCHES IN
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
MOUNTING HOLE QUANTITY1
OPENING QUANTITY2
GANG QUANTITY1
CENTER TO CENTER VERTICAL DISTANCE BETWEEN OPENINGS1.531 INCHES NOMINAL IN
INSULATING ADAPTERNOT INCLUDED
MATERIAL THICKNESS0.073 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATANATURAL FINISH AND ZINC OR CADMIUM PLATED STEEL MATERIAL AND II TYPE
LENGTH4.000 INCHES IN
HEIGHT1.140 INCHES NOMINAL IN
UNIT TYPEOUTLET
SUBSTITUTES & CROSS-REFERENCES 10
ANSI UL514CReference document
Same NSN cross-reference
Reference document — Secondary reference
V-STReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
T4-12Reference document
Same NSN cross-reference
Reference document — Secondary reference
864Reference document
Same NSN cross-reference
Reference document — Secondary reference
GC832AC1Reference document
Same NSN cross-reference
Reference document — Secondary reference
SP58R7Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21C?
21C is a IBM 1725W AC POWER SUPPLY. It is classified as a POWER_SUPPLY (HOTPLUG_PSU).
What parts can replace 21C?
There are 10 known substitutes for 21C: ANSI UL514C, V-ST, T4-12 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21C?
21C is cataloged in the U.S. Government catalog under NSN 5975-00-188-1164. 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.