Loading...
SITCSection 7
U.S. imports of optical fiber cables (SITC 77318) totaled $543.3M in July 2026, traded with 60 countries.
Importers of Optical Fiber Cables paid $56.9M in duties in July 2026 — an effective duty rate of 15% on $371.5M in dutiable value, based on actual customs collections rather than the published tariff schedule. Optical Fiber Cables imports of $543.3M in July 2026 ran 30% above the year-to-date monthly average of $418.9M.
Last updated: July 2026 dataOptical fiber cables transmit data as pulses of light through glass or plastic strands, making them the backbone of high-speed telecommunications, data center interconnects, and broadband infrastructure. Classification hinges on whether the cable contains optical fibers individually sheathed, the number of fibers, and the presence of electrical conductors — distinctions that can shift the applicable tariff heading. Imports from major producing countries may be subject to antidumping or countervailing duty orders, so verifying current trade-remedy scope rulings before entry is essential for importers.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
11.3K shipments/mo
Basic heading 42 of 642 in section 7
Basic heading 77318 · $543.3M of $175.6B
The key classification factors are whether the product transmits signals via light (optical fibers) versus electrical current, the construction of the fiber bundle (individually sheathed vs. loose-tube), and whether any metallic conductors are present for power or reinforcement. Cables with both optical fibers and electrical conductors may be classified differently depending on the principal function, so a binding ruling from CBP is advisable for ambiguous constructions.
Certain optical fiber cable products have been subject to antidumping and countervailing duty investigations targeting specific countries of origin. Importers should check the current scope of any active orders with the International Trade Administration before shipment, as scope rulings can be product-specific and country-specific.
Supplier Network
Get discovered by U.S. importers searching for HS 77318 — Optical Fiber Cables. Be the first supplier listed.
Imports · July 2026
origin
Mexico and China together supply 49% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$543.3MYoY · Pro
Exports
$253.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.