Ferrite Core Memory Module from China
A ferrite core memory module consists of a grid of tiny ferrite toroids arranged on ceramic substrates, fired after shaping to create nonmetallic magnetic storage elements. It falls under HTS 6909.19.10.00 as a ceramic ware for technical uses, specifically designed for computer data storage in legacy systems. These modules were pivotal in early computing for their reliable, non-volatile memory properties.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Verify the ceramic substrate is fired above 800°C and meets Chapter 69 definitions to avoid exclusion as unfired articles
• Provide technical specifications confirming ferrite cores on ceramic base for laboratory/technical classification, including material composition certificates