U.S. imports of Parts of Diodes, Transistors & Similar Semiconductor Devices (SITC 77688) totaled $114.9M in August 2026, imported from 48 countries.
Importers of Parts of Diodes, Transistors & Similar Semiconductor Devices paid $1.8M in duties in August 2026, an average duty rate of 1.53% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Parts of Diodes, Transistors & Similar Semiconductor Devices imports of $114.9M in August 2026 ran 26% above the year-to-date monthly average of $91.3M.
Last updated: August 2026 dataCovering components and sub-elements used in the manufacture or repair of discrete semiconductors — including photosensitive devices, light-emitting diodes, and mounted piezoelectric crystals — this heading is a key procurement category for semiconductor packaging houses and LED module manufacturers. The inclusion of LED-related parts alongside traditional diode and transistor components reflects the convergence of optoelectronics with conventional semiconductor manufacturing. Section 301 tariffs affect parts sourced from China, which is a dominant origin for LED packaging materials and lead frames, making origin tracking and first-sale valuation strategies particularly relevant for cost management.
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1.4K import shipments a month
Lead frames, bonding wires, and similar sub-components used specifically in the assembly of diodes, transistors, and LEDs generally fall within parts of semiconductor devices. However, generic metal stampings or wire not dedicated to semiconductor use may classify under base-metal or wire headings. A product-specific ruling from CBP is the most reliable way to confirm classification for novel packaging materials.
Because LED packaging components — phosphors, lead frames, lenses, and substrates — share this heading with parts for conventional discrete semiconductors, importers benefit from consolidating supplier audits and compliance reviews. Given that China is a major source of LED packaging materials subject to Section 301 tariffs, some buyers have shifted procurement to suppliers in Southeast Asia to manage landed cost.
Basic heading 146 of 642 in section 7
Basic heading 77688 · $114.9M of $172.0B
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ImportsExports
Imports
$114.9MYoY · free account
Exports
$49.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $985.6M of Parts of Diodes, Transistors & Similar Semiconductor Devices.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.
Imports · August 2026
origin
Vietnam and Malaysia together supply 67% 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.