PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

903 203Welding Machine,arc

Miller Electric Mfg. Llc · NSN 3431-01-473-0527 · FSC 3431 · No Item Name Available
Verified by PartsTable
NSN 3431-01-473-0527 — this item is cataloged by the U.S. Government under National Stock Number 3431-01-473-0527. Primary manufacturer part number: 903 203.
Features
  • Welding Machine,arc — FSC 3431
  • Mounting Type: WHEEL
  • Design Type: RECTIFIER
  • Output Current Rating in Amps: 250.0 MAXIMUM
  • Voltage in Volts: 220.0 OR 380.0 OR 415.0
  • Frequency in Hertz: 50.0
  • Unpackaged Unit Weight: 355.000 POUNDS NOMINAL LBS
  • Phase: SINGLE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Welding Machine,arc, cataloged under National Stock Number 3431-01-473-0527, is classified within Federal Supply Class 3431 (No Item Name Available) of the Metalworking Machinery (continued) group. The primary manufacturer of record is Miller Electric Mfg. Llc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3431-01-473-0527
Primary Part Number903 203
Item NameWelding Machine,arc
FSC / FSG3431 / 34 — No Item Name Available
ManufacturerMiller Electric Mfg. Llc
StatusACTIVE
Mounting TypeWHEEL
Design TypeRECTIFIER
Output Current Rating in Amps250.0 MAXIMUM
Voltage in Volts220.0 OR 380.0 OR 415.0
Frequency in Hertz50.0
Unpackaged Unit Weight355.000 POUNDS NOMINAL LBS
PhaseSINGLE
Arc Current TypeAC
Current TypeAC
Wheel Quantity4
Power SourceELECTRIC MOTOR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
3110-00-516-5289203TF INTERCHANGEABLE
Bearing,ball,annular
Fag Bearings Corporation
3110-00-884-812726118-26282D INTERCHANGEABLE
Bearing,roller,tapered
The Timken Corporation
5998-01-356-414090320-3 INTERCHANGEABLE
Retainer-Ejector,electrical Card
Hamilton Sundstrand Corporation Dba Collins Aerospace
3110-01-372-778523506244 INTERCHANGEABLE
Ball Assembly
Rolls-Royce Solutions America Inc
5998-01-554-1068EM-266-11 INTERCHANGEABLE
Circuit Card Assembly
L3 Technologies, Inc.
3110-01-620-8153903203 INTERCHANGEABLE
Bearing,roller,tapered
Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer
Cross-Reference Index
Part NumberManufacturer
903 203 Miller Electric Mfg. Co. (USA)
903 203 PRIMARY Miller Electric Mfg. Llc (USA)
SYNCROWAVE 250 Miller Electric Mfg. Llc (USA)
SYNCROWAVE 250 Miller Electric Mfg. Co. (USA)
Related Parts
3110-00-516-5289INTERCHANGEABLE
BEARING,BALL,ANNULAR
203TF
3110-00-884-8127INTERCHANGEABLE
BEARING,ROLLER,TAPERED
26118-26282D
5998-01-356-4140INTERCHANGEABLE
RETAINER-EJECTOR,ELECTRICAL CARD
90320-3
3110-01-372-7785INTERCHANGEABLE
BALL ASSEMBLY
23506244
5998-01-554-1068INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
EM-266-11
3110-01-620-8153INTERCHANGEABLE
BEARING,ROLLER,TAPERED
903203

Frequently Asked Questions

What is NSN 3431-01-473-0527?

NSN 3431-01-473-0527 is a Welding Machine,arc, manufactured by Miller Electric Mfg. Llc, classified under FSC 3431 (No Item Name Available). Status: active.

What are the part numbers for NSN 3431-01-473-0527?

NSN 3431-01-473-0527 has 4 cross-referenced part numbers: 903 203 (Miller Electric Mfg. Co.), 903 203 (Miller Electric Mfg. Llc), SYNCROWAVE 250 (Miller Electric Mfg. Llc), SYNCROWAVE 250 (Miller Electric Mfg. Co.).

What NSN replaces 3431-01-473-0527?

There are 6 known substitutes for 3431-01-473-0527: 3110-00-516-5289, 3110-00-884-8127, 5998-01-356-4140 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 903 203?

Key specifications for 903 203: Mounting Type: WHEEL; Design Type: RECTIFIER; Output Current Rating in Amps: 250.0 MAXIMUM; Voltage in Volts: 220.0 OR 380.0 OR 415.0. 12 total characteristics are documented in the Federal Logistics Information System.

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