Federal NAICS Codes

NAICS 335311: Power, Distribution, and Specialty Transformer Manufacturing

Explore obligations, trends, recent awards, and incumbent contractors for NAICS 335311.

NAICS 335311 federal market metrics

Total obligations
$4B
Total awards
46,862 awards
Active obligations
$413.2M
Size standard
800 employees

What this NAICS covers

NAICS 335311 covers manufacturing power, distribution, and specialty transformers, including winding, core assembly, insulation, tank fabrication, assembly, factory testing, and production of transformers for electrical distribution and specialty applications.

Federal opportunities under 335311 typically involve supplying manufactured transformer units that meet specified performance and testing criteria, including factory acceptance testing, production quality records, transportation and handling for energized systems, spare part provisioning, and on-site delivery coordination.

FY2025 snapshot

Obligations
$308.1M
Awards
3,558
Average award
$86.6K
Change from FY2024
+8.3%

Recent awards

Search contractors

$454,483

SUPPLYFORCE.COM, LLC

National Aeronautics and Space Administration

PIID
80SSC026P0002
PSC
6120 - TRANSFORMERS: DISTRIBUTION AND POWER STATION

$17,061

MISCELLANEOUS FOREIGN AWARDEES

Department of State

PIID
191N6526P0959
PSC
N061 - INSTALLATION OF EQUIPMENT- ELECTRIC WIRE AND POWER DISTRIBUTION EQUIPMENT

$247,780

ELGIN POWER SOLUTIONS, INC.

National Aeronautics and Space Administration

PIID
80NSSC26P0885
PSC
3670 - SPECIALIZED SEMICONDUCTOR, MICROCIRCUIT, AND PRINTED CIRCUIT BOARD MANUFACTURING MACHINERY

FAQ

What work fits NAICS 335311?
  • Procurement of pad-mounted distribution transformers delivered and factory-tested with specified kVA, voltage ratings, and tap settings.
  • Supply of custom specialty transformers for mission-critical equipment with defined winding configurations, insulation class, and factory acceptance test reports.
  • Replacement dry-type transformers for substations delivered with dielectric and load-loss test certificates and nameplate data.
  • Stocking contract for spare transformer coils, tanks, and factory-fabricated components with drawings, serial-number traceability, and test documentation.
When is NAICS 335311 a weak fit?
  • Electrical construction and installation contracts that require onsite cable routing, grounding, and setting of equipment rather than supply of new manufactured transformer units.
  • Transformer repair, rewinding, or field reconditioning services performed on installed units where the deliverable is service rather than a new manufactured transformer.
  • Power system engineering procurements focused on relay protection, system studies, or switching design where fabrication of transformer hardware is not part of the scope.
What solicitation language points to NAICS 335311?
  • Line items specify manufactured unit delivery with nameplate data, kVA, voltage, impedance, and specified tap-changer settings rather than hourly installation labor.
  • RFP requires factory acceptance testing records, dielectric and load-loss test results, and material traceability for each shipped transformer.
  • Evaluation criteria weight OEM manufacturing QA, production lead time, and submitted factory test procedures rather than installer staffing or site electrical crews.

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