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US Standard Industrial Classification (SIC) Code Lookup

Division: D - Manufacturing

US-SIC Code 3612 - Power, Distribution, and Specialty Transformers

Industry Description

Establishments primarily engaged in manufacturing power, distribution, instrument, and specialty transformers. Establishments primarily engaged in manufacturing radio frequency or voice frequency electronic transformers, coils, or chokes are classified in Industry 3677, and those manufacturing resistance welder transformers are classified in Industry 3548.

Business Examples

Common types of business activities within US SIC 3612 - Power, Distribution, and Specialty Transformers are:

  • Airport lighting transformers
  • Auto-transformers for switchboards, except telephone switchboards
  • Auto-transformers, electric (power transformers)
  • Ballasts for lighting fixtures
  • Control transformers
  • Current limiting reactors, electrical
  • Distribution transformers electric
  • Doorbell transformers, electric
  • Electric furnace transformers
  • Feeder voltage regulators and boosters (electric transformers)
  • Fluorescent ballasts (transformers)
  • Generator voltage regulators electric induction and step type
  • Ignition transformers
  • Instrument transformers except portable
  • Isolation transformers
  • Lighting transformers, fluorescent
  • Lighting transformers, street and airport
  • Line voltage regulators
  • Luminous tube transformers
  • Machine tool transformers
  • Ratio transformers
  • Rectifier transformers
  • Signaling transformers electric
  • Specialty transformers
  • Street lighting transformers
  • Toy transformers
  • Transformers, electric power
  • Transformers, for electronic meters
  • Transformers, reactor
  • Tripping transformers
  • Vibrators interrupter
  • Voltage regulating transformers electric power
  • Voltage regulators, transmission and distribution

IBISWorld Industry Research Report

Electrical Equipment Manufacturing in the US (33531)

Revenue 2025

$56.3bn

Growth 2025

-0.26%

Key Trends

  • Revenue has been volatile, as changing consumer attitudes and business sentiment alter spending on electrical equipment

  • Supply chain disruptions have caused a big rise in the prices of key inputs

  • Over the next five years, imports will fall while exports will increase very slowly

Products and Services

US-SIC Hierarchy 3612 - Power, Distribution, and Specialty Transformers

US-SIC Code 3612 - Power, Distribution, and Specialty Transformers sits in the 2-digit Power, Distribution, and Specialty Transformers sector. US SIC codes can be 2 to 8 digits and the further along the hierarchy, the more detailed and specific the category will be.

Division: D

Division Title: Manufacturing

2 Digits 3 Digits 4 Digits

Extended US-SIC Hierarchy for 3612 - Power, Distribution, and Specialty Transformers

For business marketing and targeting, US SIC Codes have been extended to provide more specific classifications within US-SIC 3612 - Power, Distribution, and Specialty Transformers. Extended US SIC Codes are being continuously updated to reflect the current business environment.

6 Digit SIC Codes

  • 361201 Power plant equipment-manufacturers
  • 361202 Electric transmission/distr equip (mfrs)
  • 361203 Power protection systems (manufacturers)
  • 361204 Power transmission equip-manufacturers
  • 361205 Voltage stabilizers (manufacturers)
  • 361206 Transformers-manufacturers
  • 361298 Power distr/specialty transformer (mfrs)

8 Digit SIC Codes

  • 36120000 Transformers, except electric
  • 36120100 Power and distribution transformers
  • 36120101 Autotransformers, electric (power transformers)
  • 36120102 Control transformers
  • 36120103 Current limiting reactors, electrical
  • 36120104 Distribution transformers, electric
  • 36120105 Feeder voltage boosters (electric transformers)
  • 36120106 Feeder voltage regulators (electric transformers)
  • 36120107 Generator voltage regulators
  • 36120108 Line voltage regulators
  • 36120109 Power transformers, electric
  • 36120110 Transmission and distribution voltage regulators
  • 36120111 Voltage regulating transformers, electric power
  • 36120112 Voltage regulators, transmission and distribution
  • 36120200 Lamp ballasts
  • 36120201 Ballasts for lighting fixtures
  • 36120202 Fluorescent ballasts
  • 36120300 Specialty transformers
  • 36120301 Airport lighting transformers
  • 36120302 Autotransformers for switchboards (exc. tele. switchboards)
  • 36120303 Doorbell transformers, electric
  • 36120304 Electric furnace transformers
  • 36120305 Electronic meter transformers
  • 36120306 Fluorescent lighting transformers
  • 36120307 Ignition transformers, for use on domestic fuel burners
  • 36120308 Lighting transformers, fluorescent
  • 36120309 Lighting transformers, street and airport
  • 36120310 Luminous tube transformers
  • 36120311 Machine tool transformers
  • 36120312 Ratio transformers
  • 36120313 Reactor transformers
  • 36120314 Rectifier transformers
  • 36120315 Signaling transformers, electric
  • 36120316 Toy transformers
  • 36120317 Tripping transformers
  • 36129900 Transformers, except electric, nec
  • 36129901 Instrument transformers (except portable)
  • 36129902 Saturable reactors
  • 36129903 Vibrators, interrupter

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US SIC Code Directory

Each US SIC Code is part of a Division, which corresponds with a numerical range. Select a Division category from the table below, then drill down to discover the industries within that Division.

Division US-SIC Code Sector title
A 01-09 Agriculture, Forestry, and Fishing
B 10-14 Mining
C 15-17 Construction
D 20-39 Manufacturing
E 40-49 Transportation, Communications, Electric, Gas, and Sanitary Services
F 50-51 Wholesale Trade
G 52-59 Retail Trade
H 60-67 Finance, Insurance, and Real Estate
I 70-89 Services
J 90-99 Public Administration

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