PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3950557Power Supply

Oshkosh Defense Llc · NSN 6120-01-600-5489 · FSC 6120 · Power Supply
Verified by PartsTable
NSN 6120-01-600-5489 — this item is cataloged by the U.S. Government under National Stock Number 6120-01-600-5489. Primary manufacturer part number: 3950557.
Features
  • Power Supply — FSC 6120
  • 3 verified cross-references
  • Primary manufacturer: Oshkosh Defense Llc
Applications
  • Electrical power distribution
  • Generator and power systems
  • Industrial motor installations
General Description

The Power Supply, cataloged under National Stock Number 6120-01-600-5489, is classified within Federal Supply Class 6120 (Power Supply) of the Electric Wire, Power, and Distribution Equipment group. The primary manufacturer of record is Oshkosh Defense Llc. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NamePower Supply
FSC / FSG6120 — Power Supply (FSG 61)
ManufacturersOshkosh Corp (CAGE 45152); Amerex Corporation Dba Amerex Corp (CAGE 54905); Oshkosh Defense Llc (CAGE 75Q65)
Technical Specifications
ParameterValue
NSN6120-01-600-5489
Primary Part Number3950557
Item NamePower Supply
FSC / FSG6120 / 61 — Power Supply
ManufacturerOshkosh Defense Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5945-00-247-3720SG2026 INTERCHANGEABLE
Relay,electromagnetic
Australian Munitions
6220-01-248-0778 INTERCHANGEABLE
Light,parking
Cross-Reference Index
Part NumberManufacturer
3950557 Oshkosh Corp (USA)
20053-01 Amerex Corporation Dba Amerex Corp (USA)
3950557 PRIMARY Oshkosh Defense Llc (USA)
Related Parts
5945-00-247-3720INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
SG2026
6220-01-248-0778INTERCHANGEABLE
LIGHT,PARKING

Frequently Asked Questions

What is NSN 6120-01-600-5489?

NSN 6120-01-600-5489 is a Power Supply, manufactured by Oshkosh Defense Llc, classified under FSC 6120 (Power Supply). Status: active.

What are the part numbers for NSN 6120-01-600-5489?

NSN 6120-01-600-5489 has 3 cross-referenced part numbers: 3950557 (Oshkosh Corp), 20053-01 (Amerex Corporation Dba Amerex Corp), 3950557 (Oshkosh Defense Llc).

What NSN replaces 6120-01-600-5489?

There are 2 known substitutes for 6120-01-600-5489: 5945-00-247-3720, 6220-01-248-0778. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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