335311 — Power, Distribution, and Specialty Transformer Manufacturing
Description
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 (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Illustrative Examples
- Fluorescent ballasts (i.e., transformers) manufacturing
- Substation transformers, electric power distribution, manufacturing
- Distribution transformers, electric, manufacturing
- Transmission and distribution voltage regulators manufacturing
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3548 - Electric and Gas Welding and Soldering Equipment (via SIC1987:3548→NAICS1997:335311→2002:335311→2007:335311→2012:335311→2017:335311→2022:335311)
- SIC 3612 - Power, Distribution, and Specialty Transformers (via SIC1987:3612→NAICS1997:335311→2002:335311→2007:335311→2012:335311→2017:335311→2022:335311)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 3431 — Electric Arc Welding Equipment
- PSC 5950 — Coils and Transformers
- PSC 6120 — Transformers: Distribution and Power Station
- PSC 6150 — Miscellaneous Electric Power and Distribution Equipment
- PSC 6160 — Miscellaneous Battery Retaining Fixtures and Liners
- PSC 6250 — Ballasts, Lampholders, and Starters
- PSC 6310 — Traffic and Transit Signal Systems
- PSC 6350 — Miscellaneous Alarm, Signal, and Security Detection Systems
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 335311 valid in 2022? ▾
Yes, 335311 is a valid 6-digit 2022 NAICS national industry code representing 'Power, Distribution, and Specialty Transformer Manufacturing' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 335311? ▾
The Small Business Administration (SBA) has established a small business size standard of 800 employees for NAICS code 335311 (Power, Distribution, and Specialty Transformer Manufacturing), calculated based on employees.
What is the legacy SIC equivalent for NAICS 335311? ▾
According to official Census Bureau concordance tables, NAICS code 335311 (Power, Distribution, and Specialty Transformer Manufacturing) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3548 - Electric and Gas Welding and Soldering Equipment, 3612 - Power, Distribution, and Specialty Transformers.
Related Pages & Tools
Further regulatory reference links for NAICS code 335311:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 335311 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Power, Distribution, and Specialty Transformer Manufacturing).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.