> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/sic/3677/ # SIC code 3677: Manufacturing electronic coils and transformers The companies classified under SIC 3677, where they are based, how big they are and how the code maps to NAICS. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** SIC 3677 is the Standard Industrial Classification code for Manufacturing electronic coils and transformers, in division D (Manufacturing). The companies counted under it are mostly small: 75% have 200 or fewer employees. ## What is SIC 3677? SIC 3677 is the Standard Industrial Classification code for Manufacturing electronic coils and transformers. It sits in division D, Manufacturing. The first two digits name the major group, and the last two narrow it to a single industry. Most of the companies counted also carry NAICS 334416 (88%). - 44% of the companies counted have 50 or fewer employees, and the middle one is in the 51 to 200 range. - The largest group is headquartered in the United States (42%). - Most were founded in the before 1960 (21%), then the 2000s (21%). **Figure: How SIC 3677 is built.** The code 3677 split into its parts: major group 36, then industry group and industry. It sits in division D, Manufacturing. *The four digits of SIC 3677.* ## Which companies are classified under SIC 3677? The biggest by headcount range include Vishay Intertechnology, Baumüller Nürnberg, Mangal Electrical Industries, Vilas Transcore and Rakon. Names link to a company profile where we have one. | Company | Headquarters | Employees | | --- | --- | --- | | [Vishay Intertechnology](https://enrich.chat/company/vishay-intertechnology/) | Malvern, PA | 10,001+ | | Baumüller Nürnberg | Nurnberg, Germany | 1,001 to 5,000 | | Mangal Electrical Industries | Jaipur, India | 501 to 1,000 | | Vilas Transcore | Vadodara, India | 501 to 1,000 | | Rakon | Auckland, New Zealand | 501 to 1,000 | | Venture Lighting India | Chennai, India | 501 to 1,000 | | Sudhir Transformers | Dadra, India | 501 to 1,000 | | Intelux Electronics | Pune, India | 501 to 1,000 | | Esennar Transformers | Hyderabad, India | 201 to 500 | | Pt Asata Utama Electrical Industries | Jakarta Pusat, Indonesia | 201 to 500 | | Electro Technik Industries | Clearwater, FL | 201 to 500 | | Pragati Electricals | Thane, India | 201 to 500 | | Mbs | Sulzbach-Laufen, Germany | 201 to 500 | | Shri Krsna Sudarshan Urja | Jaipur, India | 201 to 500 | | Smart Wires | Durham, NC | 51 to 200 | | Ornet Transformers | Mehasana, India | 51 to 200 | | Powersmiths International | Brampton, Canada | 51 to 200 | | Staco Energy Products | Miamisburg, OH | 51 to 200 | | Vats Filtration Technologies | Pune, India | 51 to 200 | | Thin Film Technology | North Mankato, MN | 51 to 200 | | Groschopp AG Drives And More | Viersen, Germany | 51 to 200 | | Ctm Magnetics | Tempe, AZ | 51 to 200 | | Bh Electronics | Burnsville, MN | 51 to 200 | | Powervolt | Addison, IL | 51 to 200 | | Sba-Trafotech | Heiligenstadt I.Ofr., Germany | 51 to 200 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Where are SIC 3677 companies based? The largest groups are headquartered in the United States (42%), India (35%) and Germany (13%). **Figure: Where companies in SIC 3677 are based.** Bars for the share of counted companies in SIC 3677 headquartered in each country: United States 42%, India 35%, Germany 13%. *Share of counted companies in SIC 3677 by headquarters country.* ## How big are the companies counted for SIC 3677? 44% of them have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. **Figure: Size of companies in SIC 3677.** Seven columns for the share of counted companies in SIC 3677 in each employee range: 11 to 50 44%, 51 to 200 31%, 201 to 500 11%, 501 to 1,000 10%, 1,001 to 5,000 2%, 5,001 to 10,000 0%, 10,001+ 2%. *Share of counted companies in SIC 3677 in each employee range.* ## How SIC 3677 compares - 44% of companies in SIC 3677 have 50 or fewer employees, against 60% across all NAICS codes on this site. ## SIC 3677 and the NAICS system NAICS replaced SIC as the U.S. federal standard in 1997, but the two do not line up one to one. These are the NAICS codes seen most among the companies counted under SIC 3677. | Code | Title | Share of counted | | --- | --- | --- | | NAICS 334416 | Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing | 88% | | NAICS 423690 | Other Electronic Parts and Equipment Merchant Wholesalers | 6% | ## How do SIC 3677 companies describe themselves? A code is assigned by classification, and a company does not choose its own, so the label a company uses for itself can differ. The most common labels here are Appliances; Electrical; and Electronics Manufacturing (70%), Machinery Manufacturing (8%) and Automation Machinery Manufacturing (5%). **Figure: How companies in SIC 3677 describe themselves.** Bars for the share of counted companies in SIC 3677 that give each industry on their public profile: Appliances; Electrical; and Electronics Manufacturing 70%, Machinery Manufacturing 8%, Automation Machinery Manufacturing 5%. *Share of counted companies in SIC 3677 by the industry they list on their public profile.* ## Where SIC codes come from SIC was created in the 1930s and is now historical: the U.S. government replaced it with NAICS in 1997. It is still widely used, and the SEC still assigns a SIC code to every company that files on EDGAR. The full list is in the [SIC manual](https://www.osha.gov/data/sic-manual) that OSHA hosts, and the Census Bureau's [guide to understanding NAICS](https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html) explains how the two relate. ## How do you reach the people at SIC 3677 companies? The people to talk to are usually operations, supply chain and procurement leaders. You can build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with SIC code 3677 (Manufacturing electronic coils and transformers) ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the operations, supply chain and procurement leaders at companies with SIC code 3677, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Other SIC codes in major group 36: [SIC 3651: Manufacturing home audio and video equipment](https://enrich.chat/sic/3651/) ## Frequently asked questions ### What is SIC code 3677? SIC 3677 is the code for Manufacturing electronic coils and transformers, in division D (Manufacturing). ### What is the NAICS code for SIC 3677 (Manufacturing electronic coils and transformers)? 88% of the companies counted carry NAICS 334416 (Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing), but the two systems do not map one to one. ### Which companies are classified under SIC 3677? The biggest by headcount range include Vishay Intertechnology, Baumüller Nürnberg, Mangal Electrical Industries, Vilas Transcore and Rakon. The page lists 25 with links to their profiles where we have them. ### How big are the companies in SIC 3677? 44% have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. ### Is SIC still used? Yes. The U.S. government replaced SIC with NAICS in 1997, but SIC codes are still common in business databases, and the SEC still uses them on EDGAR. ## Try this prompt Find the people at SIC 3677 companies ```text Use www.enrich.chat to find the operations, supply chain and procurement leaders at companies with SIC code 3677, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [SIC 3651](https://enrich.chat/sic/3651/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)