Skip to main contentPsst! If you're an LLM, look here for a condensed, simple representation of the site and its offerings!

LiveFree Webinar — Wednesday, October 28 at 2:00 PM ET

Register Free →
CLEATUS
Get CLEATUS
← Back to NAICS Codes
NAICS Code· 335311

NAICS 335311: Power, Distribution, and Specialty Transformer Manufacturing

This U.S. industry comprises establishments primarily engaged in manufacturing power, distribution, and specialty transformers (except electronic components). Industrial-type and consumer-type transformers in this industry vary (e.g., step up or step down) voltage but do not convert alternating to direct or direct to alternating current. Illustrative Examples: Fluorescent ballasts (i.e., transformers) manufacturing Substation transformers, electric power distribution, manufacturing Distribution transformers, electric, manufacturing Transmission and distribution voltage regulators manufacturing Cross-References.Show more

NAICS 335311 – Power, Distribution, and Specialty Transformer Manufacturing encompasses the design, fabrication, and assembly of transformers used to regulate, step up, or step down electrical voltage in power distribution networks and specialized applications. This includes oil-filled and dry-type transformers for military bases, remote field operations, renewable energy installations, and critical infrastructure systems.

445
Active Contracts
$294.0M
Total Obligations (12mo)
2.5K
Awarded Contracts (12mo)
612
Contractors Awarded (12mo)
2
Median Bidders per Award
-12.6%
YoY Growth

Industry Spending Overview

Federal obligations, top contractors and agencies, and related industry codes for NAICS 335311.

AI Industry Description

NAICS 335311 – Power, Distribution, and Specialty Transformer Manufacturing encompasses the design, fabrication, and assembly of transformers used to regulate, step up, or step down electrical voltage in power distribution networks and specialized applications. This includes oil-filled and dry-type ...

NAICS 335311 – Power, Distribution, and Specialty Transformer Manufacturing encompasses the design, fabrication, and assembly of transformers used to regulate, step up, or step down electrical voltage in power distribution networks and specialized applications. This includes oil-filled and dry-type transformers for military bases, remote field operations, renewable energy installations, and critical infrastructure systems. These components are essential for reliable power conditioning, isolation, and voltage stabilization in harsh or mission-critical environments, making them indispensable to defense, energy, and federal facility operations. The sector intersects with broader government efforts to modernize grid resilience, support expeditionary power systems, and ensure energy security in austere locations. Top contractors in this space include GARDNER ZEMKE CO, POWER WEST ENGINEERING LLC, COLORADO STANDBY, LLC, POWER CLINIC INC., INTER-PACIFIC INC., STARWIN INDUSTRIES, LLC, and REALITY TECHNOLOGY, INC. These firms range from small businesses with niche expertise in custom transformer designs to specialized manufacturers with experience in military-grade ruggedization and compliance with MIL-STD specifications. The competitive landscape is characterized by technical specialization, low supplier volume, and high barriers to entry due to stringent quality and certification requirements. The Department of the Interior and the Department of Defense, including the U.S. Air Force, are the primary federal buyers, driven by needs for field-deployable power systems, base infrastructure upgrades, and energy resilience for remote installations. The Department of Energy also procures specialty transformers for research facilities and grid modernization initiatives. Demand is tied to mission-critical power reliability, with recurring needs for replacement, retrofit, and expansion of aging transformer assets. The market offers concentrated opportunities for manufacturers with proven capabilities in high-reliability transformer design, EMC shielding, and compliance with federal procurement standards. Procurement trends favor domestic production, rapid turnaround for emergency deployments, and integration with microgrid and renewable energy systems, creating a strong niche for agile, technically adept suppliers.

Small Business Size Standard

The SBA threshold that decides who can bid NAICS 335311 work as a small business.

800 employees
Applies to the whole industry code

The SBA cap for this NAICS (13 CFR 121.201). A business at or under it can self-certify as small for work in this code, which is what makes it eligible for a small-business set-aside. The cap is set per NAICS, so the same company can be small in one code and not in another.

13 CFR 121.201, effective January 1, 2026. The SBA revises the table roughly once a year.

Top Contractors

Companies with the highest total award value under NAICS 335311, ranked by dollars won.

Ranked by total awards
CompanyTotal AwardsContracts
PAF ELECTRICAL, INC.$57.2M2
TEPCO ENERGY PARTNER, INCORPORATED$26.2M3
VINCORION LLC$20.2M6
TELEDYNE INSTRUMENTS INC$19.0M5
THE BOEING COMPANY$12.9M1
THE CHUGOKU ELECTRIC POWER COMPANY, INCORPORATED$12.2M1
P.A.R. PRODUCTS CO$10.1M82
SIEMENS INDUSTRY INC$9.9M1
PHILLIP CABLE MANUFACTURING, INC.$5.2M207
SCHNEIDER ELECTRIC USA, INC.$5.2M24

Top Agencies

Federal agencies directing the most contract spending toward NAICS 335311.

Department Of Defense2,165 awards$224.4M
DLA Aviation111 awards$17.7M
Ut DLA Aviation At Ogden6 awards$15.1M
DLA Land And Maritime76 awards$11.5M
Department Of Transportation25 awards$5.8M
Department Of The Interior7 awards$3.1M
Western-Desert Southwest Region1 award$2.7M
Al DLA Aviation At Huntsville5 awards$2.3M
Department Of Defense (dod)8 awards$2.0M
W071 Endist Portland2 awards$1.4M

Competition

How many companies historically bid on federal awards in NAICS 335311, from bidder counts reported on USAspending.

Fewer Bidders

Median under 3 bidders per reported award. · 48,787 reported awards

Median Bidders

2

Per reported award, all-time

Single-Bid Awards

39%

Share of reported awards with one bidder

10+ Bidder Awards

5%

Share of reported awards with 10+ bidders

Reported Awards

48,787

94% of 51,948 total awards

Bidder Count Distribution by Fiscal Year

Share of reported awards in each bidder-count bracket per federal fiscal year.

How this code compares up the NAICS hierarchy. Parent cohorts pool every code under their prefix, so they are the steadier baseline when a 6-digit sample is thin.

Industry FamilyCompetitionMedian BiddersSingle-BidBidder MixReported Awards
335311This Code
Power, Distribution, and Specialty Transformer Manufacturing
Fewer Bidders239%
48,78794% of 51,948
33531NAICS Industry
Fewer Bidders237%
233,15593% of 249,808
3353Industry Group
Electrical Equipment Manufacturing
Fewer Bidders237%
233,15593% of 249,808
335Subsector
Fewer Bidders244%
910,15864% of 1,420,758
33Sector
Manufacturing
Fewer Bidders244%
16,883,00469% of 24,369,785

Bidder counts reported on past federal awards in this NAICS (USAspending). An open opportunity has no bidders yet, so this is the historical norm for similar work, not a fact about this solicitation. Not all awards report bidder counts, and fewer bidders often means incumbent-held work rather than an easier win. Federal reporting of bidder counts fell from ~96% of awards (FY2016) to ~30% (FY2018 onward); the chart shows shares of reported awards, and washed-out stretches mark years with fewer than 30 of them.

Related NAICS Codes

Industries similar to Power, Distribution, and Specialty Transformer Manufacturing, by shared sector, subsector, and industry group.

Motor and Generator Manufacturing

This U.S. industry comprises establishments primarily engaged in manufacturing electric motors (exce...
335312Same Industry GroupHigh Similarity

Switchgear and Switchboard Apparatus Manufacturing

This U.S. industry comprises establishments primarily engaged in manufacturing switchgear and switch...
335313Same Industry GroupHigh Similarity

Relay and Industrial Control Manufacturing

This U.S. industry comprises establishments primarily engaged in manufacturing relays, motor starter...
335314Same Industry GroupHigh Similarity

Residential Electric Lighting Fixture Manufacturing

This U.S. industry comprises establishments primarily engaged in manufacturing fixed or portable res...
335131Same SubsectorMedium Similarity

Commercial, Industrial, and Institutional Electric Lighting Fixture Manufacturing

This U.S. industry comprises establishments primarily engaged in manufacturing commercial, industria...
335132Same SubsectorMedium Similarity

Electric Lamp Bulb and Other Lighting Equipment Manufacturing

This U.S. industry comprises establishments primarily engaged in manufacturing electric light bulbs,...
335139Same SubsectorMedium Similarity

Small Electrical Appliance Manufacturing

This industry comprises establishments primarily engaged in manufacturing small electric appliances ...
335210Same SubsectorMedium Similarity

Major Household Appliance Manufacturing

This industry comprises establishments primarily engaged in manufacturing household-type cooking app...
335220Same SubsectorMedium Similarity

Explore contracts across multiple NAICS codes Browse all NAICS Codes

Dotted
NAICS 335311 FAQ

Frequently Asked Questions

NAICS code 335311 covers Power, Distribution, and Specialty Transformer Manufacturing. This U.S. industry comprises establishments primarily engaged in manufacturing power, distribution, and specialty transformers (except electronic components). Industrial-type and consumer-type transformers in this industry vary (e.g., step up or step down) voltage but do not convert alternating to direct or direct to alternating current. Illustrative Examples: Fluorescent ballasts (i.e., transformers) manufacturing Substation transformers, electric power distribution, manufacturing Distribution transformers, electric, manufacturing Transmission and distribution voltage regulators manufacturing Cross-References.

Recently Posted in Power, Distribution, and Specialty Transformer Manufacturing

NAICS: 335311
New
SLED
24-17.9B
Solicitation # 48985
The City of Piqua, Ohio, is soliciting bids for Project 24-17.9B, which involves the procurement and furnishing of major equipment for the Piqua 69kV The Site Substation. The engineer's estimate for this equipment project is 575,000 dollars. This solicitation, identified by number 48985, was posted on October 6, 2026, with a response deadline of October 21, 2026, at 2:00 PM. The project falls under NAICS code 335311 and will be performed within the state of Ohio.
City of Piqua

POSTED

1 day ago

DEADLINE

in 4 days
View Details
NAICS: 335311
New
DIBBS
Branched Electrical Power Cable Assembly FabricationThis subcontract involves the fabrication of nine branched electrical power cable assemblies for prime contractors supporting the DLA Weapons Support ASC Commodities Division. All work must be performed in accordance with Reference Drawing NR 53711 8216904 Revision A, with quality assurance sampling conducted per MIL-STD-1916 or ASQ Z1.4. Additionally, the contractor must ensure zero mercury content as mandated by NAVSEA 5100-003D and apply markings according to RQ017. The project requires the contractor to have a CMMC Level 2 self-assessment. Performance of the contract will take place in New Cumberland, Pennsylvania. Interested parties must respond by October 23, 2026, for this Department of Defense requirement categorized under NAICS code 335311.
DLA WEAPONS SUPPORT ASC COMMODITIES DIVISION

POSTED

1 day ago

DEADLINE

in 6 days
View Details
NAICS: 335311
New
DIBBS
Bus Conductor Fabrication and SupplyThis subcontract involves the manufacture and supply of Bus Conductors, identified by NSN 6150-01-653-6747, for prime contractors supporting the DLA Weapons Support Nuclear Reactor Program. The selected provider is responsible for fabricating six finished units in strict accordance with the DLA Master List of Technical and Quality Requirements. Quality assurance must be maintained through sampling methods adhering to MIL-STD-1916 or ASQ H1331, with a critical requirement that no mercury or mercury compounds are utilized during production. Logistical requirements specify that all units must be packaged according to MIL-STD-2073-1E and marked per MIL-STD-129. The project falls under NAICS code 335311 and is managed by the Department of Defense. Performance of the contract will take place in New Cumberland, Pennsylvania.
DLA WEAPONS SUPPORT NUCLEAR REACTOR PROGRAM

POSTED

1 day ago

DEADLINE

in 9 days
View Details
NAICS: 335311
New
DIBBS
Push-Pull Switch ManufacturingThis subcontract involves the manufacture of high-reliability push-pull switches for the Department of Defense, specifically under the DLA Weapons Support Electrical Devices Division. The scope of work includes the fabrication of switch housings and internal electrical contacts, assembly of the push-pull mechanisms, and rigorous testing for mechanical actuation and electrical continuity. The contractor is responsible for delivering eight completed units under NSN 5930-01-028-1953 to a performance location in Tracy, California. Strict compliance is required regarding Critical Application Item designations and mercury-free mandates. Additionally, the successful bidder must provide a CMMC Level 2 Self-Assessment to meet cybersecurity standards. Responses to this opportunity are due by October 26, 2026.
DLA WEAPONS SUPPORT ELECTRICAL DEVICES DIV

POSTED

1 day ago

DEADLINE

in 9 days
View Details
NAICS: 335311
Awarded
DIBBS
TRANSFORMER, POWER
Solicitation # SPE7M1-26-T-379S
Solicitation SPE7M1-26-T-379S is a request for quotations issued by DLA Land and Maritime for the procurement of six power transformers, identified by NSN 5950012559554. This is a critical application item that must be manufactured in accordance with TDP Rev A Gen 2 and basic drawing 10001 3257951 Revision H. The required delivery date is June 21, 2027, with a delivery lead time of 168 days after order. Supplies are to be delivered FOB Origin to the DLA Distribution DDSP New Cumberland facility in Pennsylvania, with inspection and acceptance occurring at the destination. The contract mandates strict adherence to quality and environmental standards, requiring a manufacturer inspection system compliant with ISO 9001:2015. Prohibited materials include Class I ozone-depleting substances and intentionally added mercury, except in specific functional applications. Packaging and marking must comply with MIL-STD-2073-1E and MIL-STD-129, with additional requirements for hazardous materials per the Hazard Communication Standard and IP025. Administrative requirements include the use of the Wide Area WorkFlow system for invoicing and compliance with the Buy American Act and Berry Amendment. Price evaluation preferences are available for certified HUBZone small business concerns.
Defense Logistics Agency

POSTED

1 day ago

DEADLINE

N/A
View Details
NAICS: 335311
New
DIBBS
CABLE ASSEMBLY, POWER, E
Solicitation # SPE4A6-27-T-4662
Solicitation SPE4A6-27-T-4662 is issued by the DLA Weapons Support ASC Commodities Division for the procurement of nine branched electrical power cable assemblies, identified by NSN 6150-01-657-0511. The contract specifies a delivery period of 246 days, with a need ship date of October 8, 2026, and an original required delivery date of December 13, 2027. Delivery is FOB Origin, with the destination and acceptance point located at the DLA Distribution DDSP New Cumberland Facility in Pennsylvania. The items are designated as critical application items and must adhere to specific technical drawings and standards, including NAVSEA 5100-003D. The contract mandates strict quality and safety compliance, including a prohibition on the intentional addition of mercury or mercury-containing compounds. Quality assurance is governed by MIL-STD-1916 or ASQ SPE4A6-27-T-4662, with acceptance based on zero non-conformances in the sample lot. Packaging and marking must comply with MIL-STD-129 and RP001, utilizing specific unit and intermediate containers designated as E5. Administrative requirements include the use of the Wide Area WorkFlow system for invoicing and adherence to CMMC Level 2 self-assessment and DFARS cybersecurity standards for safeguarding covered defense information. The procurement falls under NAICS 335311 and requires compliance with the Buy American Act and the Berry Amendment.
DLA WEAPONS SUPPORT ASC COMMODITIES DIVISION

POSTED

1 day ago

DEADLINE

in 6 days
View Details
NAICS: 335311
Awarded
DIBBS
TRANSFORMER, POWER AUTOTRANSFORMER
Solicitation # SPE7M127F0288
Defense Logistics Agency award SPE7M127F0288 is a delivery order issued on October 15, 2026, to Coast/Advanced Chip Magnetics, Inc. under the broader Indefinite Delivery Contract SPE7M526D61ZZ. This specific order, managed by the DLA Weapons Support Maritime Supply Chain, is for the procurement of two power autotransformers identified by NSN 5950005834769. The total price for this award is 788.00 dollars, with a required delivery date of April 1, 2027, to the DLA Distribution Depot Oklahoma. The overarching Indefinite Delivery Contract, established by DLA Land and Maritime on July 10, 2026, provides a maximum contract value of 350,000.00 dollars for the specified part number. This framework utilizes the DLA Master Solicitation for Automated Simplified Acquisitions and governs the order limitations and quantity clauses applicable to subsequent delivery orders like SPE7M127F0288.
Defense Logistics Agency

POSTED

1 day ago

DEADLINE

N/A
View Details
NAICS: 335311
New
DIBBS
WIRING HARNESS
Solicitation # SPE7L5-27-T-0238
Solicitation SPE7L5-27-T-0238 is a request for quotations from the DLA Weapons Support Land Supplier Operations Engines for the procurement of nine wiring harnesses, identified by NSN 6150-01-514-1692 and Oshkosh Defense LLC part number 3462464. The items are designated as repairable and must be delivered to DLA Distribution San Joaquin in Tracy, California, with a need ship date of April 13, 2027, and an original required delivery date of July 11, 2027. The contract is governed by NAICS code 335311 and utilizes a fixed-price structure with inspection and acceptance occurring at the destination. Technical and quality requirements are managed through the DLA Master List, while packaging must adhere to MIL-STD-2073-1E and RP001. Specific handling instructions require cables to be coiled without impairing functional properties and secured to prevent kinking. Due to the items being classified as protected cargo, Special Marking Code 40 applies, requiring the omission of item nomenclature from shipping containers per MIL-STD-129. Administrative requirements include electronic invoicing via the Wide Area WorkFlow system and compliance with various FAR and DFARS clauses, including cybersecurity standards under DFARS 252.204-7012 and domestic sourcing restrictions under the Buy American Act.
DLA WEAPONS SUPPORT LAND SUPPLIER OPNS ENGINES

POSTED

1 day ago

DEADLINE

in 9 days
View Details
NAICS: 335311
Awarded
DIBBS
TRANSFORMER, POTENTIAL
Solicitation # SPE7M1-27-T-0427
Solicitation SPE7M1-27-T-0427 is issued by the DLA Weapons Support Maritime Supply Chain for the procurement of one potential transformer, identified by NSN 5950017002868. The requirement specifies a need ship date of March 2, 2027, with an original required delivery date of October 31, 2027. Delivery is established as FOB Origin, with inspection and acceptance occurring at the destination, specifically the DLA Distribution New Cumberland facility in Pennsylvania. The procurement may be subject to automated award, and a price evaluation preference is available for certified HUBZone Small Business Concerns. Technical compliance requires adherence to basic drawing 30554 17-60240 Revision D and the DLA Master List of Technical and Quality Requirements. Packaging must follow ASTM D3951 for non-hazardous materials, with palletization per RP001 and marking and labeling in accordance with MIL-STD-129. The contract incorporates various FAR and DFARS clauses, including strict mandates on safeguarding covered defense information, combating trafficking in persons, and compliance with the Buy American Act and Berry Amendment. All payment requests and receiving reports must be processed electronically through the Wide Area WorkFlow system.
Defense Logistics Agency

POSTED

1 day ago

DEADLINE

N/A
View Details
NAICS: 335311
New
DIBBS
BUS, CONDUCTOR
Solicitation # SPE7M2-27-T-0221
Solicitation SPE7M2-27-T-0221 is issued by the DLA Weapons Support Nuclear Reactor Program for the procurement of six units of BUS, CONDUCTOR, identified by NSN 6150-01-653-6747. The requirement is classified under NAICS code 335311. The need ship date is April 13, 2027, with an original required delivery date of October 25, 2027. Delivery is set as FOB Origin under the First Destination Transportation program, with the freight shipping destination being the DLA Distribution DDSP New Cumberland Facility in Pennsylvania. The contract mandates strict quality and packaging standards, including compliance with MIL-STD-2073-1E for packaging and MIL-STD-129 for marking. Inspection and acceptance will occur at the destination, utilizing sampling methods per MIL-STD-1916 or ASQ H1331. A critical prohibition is placed on the use of mercury or mercury compounds in preservation, packaging, and marking. Administrative requirements include electronic invoicing via the Wide Area WorkFlow system and adherence to domestic sourcing regulations, such as the Buy American Act and the Berry Amendment. Quotations must be submitted through the DLA Internet Bid Board System by October 26, 2026.
DLA WEAPONS SUPPORT NUCLEAR REACTOR PROGRAM

POSTED

1 day ago

DEADLINE

in 9 days
View Details
NAICS: 335311
Awarded
DIBBS
TRANSFORMER ASSEMBLY
Solicitation # SPE7M527F0236
Contract SPE7M527F0236 is a delivery order issued on October 15, 2026, by the Defense Logistics Agency Weapons Support Active Devices Division to NGH Retail LLC. This order falls under the broader Indefinite Delivery Contract SPE7M526D61NN, which was originally established on May 11, 2026, with a maximum value of 350,000.00 dollars. The specific purpose of this delivery order is the procurement of 41 units of Transformer Assembly, identified by part number 4100000SC1 and NSN 6120016495314. The total price for this award is 3,841.70 dollars. The contracted items must be delivered to DLA Distribution San Joaquin located in Tracy, California, by the required delivery date of April 13, 2027. The overarching contract is managed by the Department of Defense and includes standard federal acquisition regulations regarding order limitations and indefinite quantities.
Defense Logistics Agency

POSTED

1 day ago

DEADLINE

N/A
View Details
NAICS: 335311
New
DIBBS
CABLE ASSEMBLY, SPECIAL
Solicitation # SPE7M2-27-T-0227
Solicitation SPE7M2-27-T-0227 is a fixed-price procurement issued by the DLA Weapons Support Nuclear Reactor Program for the supply of 10 units of a special purpose electrical cable assembly, identified by NSN 6150-01-707-9908. The contract requires delivery within 168 days, with a need ship date of April 13, 2027, and an original required delivery date of June 26, 2027. Delivery is FOB Origin to the DLA Distribution DDSP New Cumberland facility in Pennsylvania. Inspection and acceptance will occur at the destination, with sampling conducted according to MIL-STD-1916 or ASQ H1331, requiring zero non-conformances for acceptance. The procurement includes stringent security and regulatory requirements, including CMMC Level 2 certification and compliance with DFARS 252.204-7012 for safeguarding covered defense information. Technical data is subject to ITAR or EAR export controls, requiring contractors to have approved US/Canada Joint Certification Program certification. Packaging and marking must adhere to MIL-STD-2073-1E and MIL-STD-129, while hazardous materials must be labeled per the Hazard Communication Standard. Additionally, offerors must comply with the Buy American Act and the Berry Amendment, and all quotes must be submitted via the DLA Internet Bid Board System.
DLA WEAPONS SUPPORT NUCLEAR REACTOR PROGRAM

POSTED

1 day ago

DEADLINE

in 9 days
View Details

Win Contracts in Power, Distribution, and Specialty Transformer Manufacturing

Get AI-powered intelligence on NAICS 335311 procurement

Real-time contract opportunities for NAICS 335311 (Power, Distribution, and Specialty Transformer Manufacturing)

AI-powered matching based on your business capabilities and past performance

Competitive analysis of contractors winning awards in this industry

Automated alerts when new opportunities are posted

Miguel
Hillary
Keith Deutsch
Christine

Join 750+ contractors already using CLEATUS