NAICS Code 335311: Power, Distribution, and Specialty Transformer Manufacturing
National industry
SBA small business size standard: 800 employees
Definition
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.
Government contracts for this product: PSC 6150 Miscellaneous Electric Power and Distribution Equipment
Code facts
- Part of
-
-
31-33
-
335
-
3353
- 33531
-
3353
-
335
-
31-33
- Contract awards
- 2,285 In the last 12 months
- Contract obligations
- $329,861,495 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 335311
- Airport lighting transformers manufacturing
- Arc-welding transformers, separate solid-state, manufacturing
- Autotransformers for switchboards (except telephone switchboards) manufacturing
- Autotransformers manufacturing
- Ballasts (i.e., transformers) manufacturing
- Boosters, feeder voltage (i.e., electrical transformers), manufacturing
- Burner ignition transformers manufacturing
- Control transformers manufacturing
- Current limiting reactors, electrical, manufacturing
- Distribution transformers, electric, manufacturing
- Electric furnace transformers manufacturing
- Feeder voltage regulators and boosters (i.e., electrical transformers) manufacturing
- Fluorescent ballasts (i.e., transformers) manufacturing
- Fluorescent lighting transformers manufacturing
- Generator voltage regulators, electric induction and step-type (except engine electrical equipment), manufacturing
- Instrument transformers (except complete instruments) for metering or protective relaying use manufacturing
- Isolation transformers manufacturing
- Lamp ballasts manufacturing
- Lighting transformers manufacturing
- Lighting transformers, street and airport, manufacturing
- Line voltage regulators (i.e., electric transformers) manufacturing
- Luminous tube transformers manufacturing
- Machine tool transformers manufacturing
- Power transformers, electric, manufacturing
- Regulating transformers, power system-type, manufacturing
- Regulators (i.e., electric transformers), feeder voltage, manufacturing
- Saturable transformers manufacturing
- Signaling transformers, electric, manufacturing
- Specialty transformers, electric, manufacturing
- Substation transformers, electric power distribution, manufacturing
- Transformers, electric power, manufacturing
- Transformers, ignition, for use on domestic fuel burners, manufacturing
- Transformers, reactor, manufacturing
- Transformers, separate solid-state arc-welding, manufacturing
- Transmission and distribution voltage regulators manufacturing
- Voltage regulating transformers, electric power, manufacturing
- Voltage regulators, transmission and distribution, manufacturing
Show all 37
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $70,575 |
| FY2026 | $279,220,800 |
| FY2025 | $329,861,495 |
| FY2024 | $300,934,686 |
| FY2023 | $327,408,250 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Tepco Energy Partner, Incorporated | $48,701,006 | |
| 2 | Vincorion LLC | $42,368,236 | |
| 3 | The Chugoku Electric Power Company, Incorporated | $23,780,833 | |
| 4 | Teledyne Instruments Inc. | $18,997,145 | |
| 5 | Siemens Industry Inc. | $11,934,517 | |
| 6 | Tohoku Electric Power Company Incorporated | $9,584,322 | |
| 7 | RCT Systems, Inc. | $7,717,000 | |
| 8 | P.a.r. Products Co | $6,889,943 | |
| 9 | General Dynamics Land Systems Inc. | $6,766,362 | |
| 10 | Triman Industries Inc. | $6,529,502 |
See the full FY2025 ranking of NAICS 335311 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Navy | $103,879,586 | |
| 2 | Department of the Army | $66,436,411 | |
| 3 | Defense Logistics Agency | $53,249,749 | |
| 4 | Air Force | $41,295,336 | |
| 5 | Department of Transportation | $6,365,951 | |
| 6 | Department of the Interior | $2,118,493 | |
| 7 | Department of Veterans Affairs | $1,505,783 | |
| 8 | Department of Energy | $1,212,387 | |
| 9 | National Aeronautics and Space Administration | $837,221 | |
| 10 | Department of State | $587,851 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 6150 Miscellaneous Electric Power and Distribution Equipment | $166,213,241 | |
| 2 | 5975 Electrical Hardware and Supplies | $33,652,176 | |
| 3 | 1905 Combat Ships and Landing Vessels | $16,519,287 | |
| 4 | 6115 Generators and Generator Sets, Electrical | $14,541,466 | |
| 5 | 6120 Transformers: Distribution and Power Station | $11,627,650 | |
| 6 | 6110 Electrical Control Equipment | $8,665,716 | |
| 7 | 5950 Coils and Transformers | $7,456,083 | |
| 8 | 6350 Miscellaneous Alarm, Signal, and Security Detection Systems | $4,661,897 | |
| 9 | 6250 Ballasts, Lampholders, and Starters | $2,735,750 | |
| 10 | 6130 Converters, Electrical, Nonrotating | $2,552,635 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Texas | $48,098,803 | |
| 2 | New Hampshire | $21,764,161 | |
| 3 | Tennessee | $12,361,387 | |
| 4 | Maryland | $10,241,382 | |
| 5 | New Jersey | $10,171,165 | |
| 6 | Massachusetts | $10,127,595 | |
| 7 | Michigan | $7,103,997 | |
| 8 | New York | $7,047,483 | |
| 9 | California | $6,915,048 | |
| 10 | Florida | $6,477,181 | |
| 11 | Virginia | $5,430,521 | |
| 12 | Oregon | $4,956,971 | |
| 13 | Rhode Island | $4,900,284 | |
| 14 | Georgia | $4,404,168 | |
| 15 | Wisconsin | $4,052,319 | |
| 16 | Alabama | $3,395,081 | |
| 17 | Pennsylvania | $2,783,977 | |
| 18 | Illinois | $2,417,394 | |
| 19 | Ohio | $2,188,903 | |
| 20 | Connecticut | $1,982,276 | |
| 21 | Nevada | $1,454,971 | |
| 22 | District of Columbia | $1,293,576 | |
| 23 | Arizona | $998,101 | |
| 24 | Kansas | $783,879 | |
| 25 | Iowa | $705,250 | |
| 26 | Colorado | $678,005 | |
| 27 | Vermont | $629,511 | |
| 28 | Kentucky | $572,676 | |
| 29 | Louisiana | $545,324 | |
| 30 | Indiana | $530,666 | |
| 31 | Oklahoma | $375,460 | |
| 32 | North Dakota | $349,500 | |
| 33 | West Virginia | $287,090 | |
| 34 | Hawaii | $283,447 | |
| 35 | North Carolina | $179,570 | |
| 36 | Arkansas | $99,819 | |
| 37 | South Carolina | $85,322 | |
| 38 | Washington | $65,393 | |
| 39 | Montana | $41,833 | |
| 40 | Wyoming | $28,463 | |
| 41 | Minnesota | $26,224 | |
| 42 | Mississippi | $12,717 | |
| 43 | Nebraska | $8,589 |
Show all 43
Shares are of everything obligated under NAICS 335311 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 17,128 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 335311?
NAICS 335311 is Power, Distribution, and Specialty Transformer Manufacturing, a national industry in NAICS 31-33, Manufacturing.
What is the NAICS code for lamp ballasts manufacturing?
The NAICS code for lamp ballasts manufacturing is 335311, Power, Distribution, and Specialty Transformer Manufacturing.
What is the NAICS code for autotransformers manufacturing?
The NAICS code for autotransformers manufacturing is 335311, Power, Distribution, and Specialty Transformer Manufacturing.
What is the NAICS code for control transformers manufacturing?
The NAICS code for control transformers manufacturing is 335311, Power, Distribution, and Specialty Transformer Manufacturing.
When did the size standard for NAICS 335311 last change?
The most recent Federal Register rule on record that names NAICS 335311 in the SBA's size standards is "Small Business Size Standards: Manufacturing and Industries With Employee-Based Size Standards in Other Sectors Except Wholesale Trade and Retail Trade" (88 FR 9970), published Feb 15, 2023 and effective Mar 17, 2023.
How much do federal agencies spend under NAICS 335311?
Federal contracts under NAICS 335311 obligated $329,861,495 in fiscal year 2025 and $1,237,495,805 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 335311?
The contractors with the most obligated under NAICS 335311 in fiscal years 2026 and 2027 are Tepco Energy Partner, Incorporated ($48,701,006); Vincorion LLC ($42,368,236); and The Chugoku Electric Power Company, Incorporated ($23,780,833).
Which agencies buy the most under NAICS 335311?
The agencies that obligated the most under NAICS 335311 in fiscal years 2026 and 2027 are Department of the Navy ($103,879,586), Department of the Army ($66,436,411) and Defense Logistics Agency ($53,249,749).
Which PSC codes are used with NAICS 335311?
The PSC codes with the most obligated under NAICS 335311 in fiscal years 2026 and 2027 are 6150 Miscellaneous Electric Power and Distribution Equipment, 5975 Electrical Hardware and Supplies and 1905 Combat Ships and Landing Vessels.
Where is the work under NAICS 335311 performed?
By place of performance, the states with the most contract obligations under NAICS 335311 over the last 12 months are Texas ($48,098,803), New Hampshire ($21,764,161) and Tennessee ($12,361,387).
What is the latest contract opportunity under NAICS 335311?
The latest contract opportunity under NAICS 335311 is USACE Kansas City District - Stockton Dam and Powerhouse Procurement - Resin Impregnated Synthetic (RIS) Bushings, pre-solicitation from ENDIST Kansas City (USACE), posted November 6, 2026.
On GovTribe
See everything under NAICS 335311
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
- Contacts who buy under this code
- Ask GovTribe AI about this code