TDA Magnetics

A privately held Southern California maker of magnet components and assemblies in sintered SmCo, sintered and bonded NdFeB, ferrite and alnico, with coating and plating, for aerospace, semiconductor, medical and industrial customers; it does not state where its rare earth magnet material is made.

Points to check

Facts from the sources on this page that a reader should weigh before relying on the company's own figures.

The company does not state where its sintered NdFeB or SmCo magnet material is made.
No ITAR registration or DFARS compliance statement is published on the company website.
No production capacity, output, revenue or ownership details are published.
The only federal contract on record is a $13,964 NASA purchase order in fiscal 2026.

At a glance

Founded: Not established in public sources — No founding date is published. The company says it has close to 30 years of experience; its SAM registration dates from March 17, 2015; a third-party directory (ZoomInfo) gives 2003.
Headquarters: Rancho Dominguez (Compton postal area), Los Angeles County, California, United States
Ownership: Private California LLC; self-certified in SAM as minority-owned and Asian-Pacific American-owned. Owners are not named in public sources.
Stage: Mature. Registered as a federal supplier since March 2015 and AS9100D certified, it sells magnet components and assemblies commercially, including a fiscal 2026 NASA order. No output figures are published.
Listing: Private. Privately held California LLC (CAGE 7CMX4); no public filings.
Revenue: Not publicly disclosed. This company does not publish revenue and no named third party has published an estimate of it.

Capacity

Each date below links to the document the figure came from. A capacity figure with no source is not on this page.

What	Figure	Status	As of
Magnet components and assemblies, Rancho Dominguez (no output figure published; headcount shown as a size indicator)	No capacity or output published; directories list 1-10 (GovTribe) or 11-50 (Crunchbase, ZoomInfo) employees	Operating	Oct 2026

Narrative

TDA Magnetics LLC is a privately held maker of permanent magnets, magnet assemblies and magnetic components at 1175 West Victoria Street, Rancho Dominguez, in Los Angeles County, California. Its website lists sintered samarium cobalt, sintered and bonded neodymium iron boron, ceramic (ferrite) and alnico magnets, with phenolic resin, nickel, IVD, parylene and epoxy coatings and plating, and describes custom fabrication of magnets and magnet assemblies for aerospace and defense, semiconductor and wafer equipment, medical, industrial, automotive, telecommunications and consumer markets, from prototype through production. The company states AS9100D and ISO 9001:2015 certification and says it has close to 30 years of experience, but it does not publish a founding date. In the federal SAM registry, where it has been registered since March 17, 2015 under CAGE code 7CMX4, it is a California limited liability company that self-certifies as a small, minority-owned, Asian-Pacific American-owned business, with NAICS code 332999. The one federal contract listed for it in databases built on USAspending is a NASA purchase order of $13,964, described as procurement of TDA magnets for future builds, in fiscal 2026; one database dates it November 26, 2025 and another March 18, 2026. The website refers to a U.S. manufacturing facility but does not say where its sintered NdFeB or SmCo material is made, and the company publishes no ITAR registration, DFARS compliance statement, production capacity, revenue or ownership details. Third-party business directories give its headcount as 1 to 10 or 11 to 50 employees.

Where public sources disagree

NASA purchase order 80NSSC26P0026 ($13,964): GovConInABox dates it November 26, 2025; GovTribe gives an award date of March 18, 2026.
Headcount: GovTribe lists 1-10 employees; Crunchbase and ZoomInfo list 11-50.
Founding: ZoomInfo gives 2003; the company website says close to 30 years of experience; SAM registration dates from March 17, 2015.
GovTribe lists under TDA Magnetics a $3,725,422 Air Force Research Laboratory cooperative agreement (FA86502025509, September 30, 2020) for a Defense Production Act Title III study of sintered NdFeB; GovConInABox and Sweetspot, which use the same UEI, list only the $13,964 NASA award.

Sources

TDA Magnetics website (materials, coatings, certifications) — TDA Magnetics LLC (2026-10-19)
Federal contractor profile (UEI, CAGE, NASA award, minority-owned) — GovConInABox (USAspending data) (2026-10-19)
Vendor record (SAM registration date, business types) — GovTribe (2026-10-19)
Aerospace and defense page — TDA Magnetics LLC (2026-10-19)
Contact page (address) — TDA Magnetics LLC (2026-10-19)
Semiconductor page — TDA Magnetics LLC (2026-10-19)
Federal contractor record (business types, state of incorporation) — Sweetspot (2026-10-19)
Company record — Crunchbase (2026-10-19)
Company record — ZoomInfo (2026-10-19)

How this page is sourced

Everything here comes from public sources — company filings, annual reports, exchange announcements, government releases and trade press. Every figure is linked to the document it came from and carries the date that document was published, because a capacity number without a date is not a fact, it is a rumor with a decimal point.

What is deliberately absent: material nonpublic information. I have spent more than two decades in this industry and a good deal of what I know about these companies I learned under NDA. Those obligations do not expire and they do not bend for a website. Nothing I have been told in confidence appears here in any form, and nothing on this page — or missing from it — should be read as a signal about what I know privately. I hold NDAs absolutely. It is the reason clients tell me things.

Judgment is the other thing left out on purpose. This page reports what has been published and who published it. Whether a target is credible, whether a ramp will hold, whether a capacity figure survives contact with the plant behind it — that is the work I do for clients, and it does not belong in a free reference page.

Where public sources disagree, I say so rather than picking a winner. Where a figure has not been published, the field says so rather than carrying an estimate. An empty field is information too.

Public filings tell you what a company has said. Whether it holds up is a different question, and the one I get hired to answer.

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