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.
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
| NAICS Code | 335311 |
|---|---|
| Industry Title | Power, Distribution, and Specialty Transformer Manufacturing |
| SBA Size Standard | 800 employees |
| U.S. Establishments | 242 (Census CBP, 2023) |
| IRS PBA Code | 335310 (rolled-up match) |
| Sectors Hierarchy | Sector 31-33 → 335 → 3353 |
| Source / Verified | US Census 2022 NAICS Manual, Census CBP / 2026-06-28 |
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)
Related Resources & Compliance Guides
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.
- 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.
Related Industries in 3353
Frequently Asked Questions (FAQ)
Is 335311 a valid 2022 NAICS code?
NAICS 335311 is 'Power, Distribution, and Specialty Transformer Manufacturing', a 2022 U.S. national industry under Sector 31-33 (Manufacturing); the SBA small-business size standard is 800 employees.
What is the SBA size standard for NAICS 335311?
The SBA small business size standard for NAICS 335311 is 800 employees (based on employees).
What is the legacy SIC code mapping for 335311?
NAICS code 335311 maps to the legacy 1987 SIC codes: 3548 - Electric and Gas Welding and Soldering Equipment, 3612 - Power, Distribution, and Specialty Transformers.