U.S. imports of Parts for Telephones & Other Voice/Data Transmission Apparatus (HS 851779) totaled $231.0M in August 2026, imported from 69 countries.
Importers of Parts for Telephones & Other Voice/Data Transmission Apparatus paid $23.8M in duties in August 2026, an average duty rate of 10.28% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Parts for Telephones & Other Voice/Data Transmission Apparatus imports of $231.0M in August 2026 ran 20% above the year-to-date monthly average of $192.3M.
Last updated: August 2026 dataReplacement and OEM parts for telephone sets and other voice, image, and data transmission apparatus — circuit boards, housings, keypads, and similar components — are consolidated under a single US tariff line (8517790000). Vietnam leads supply, followed by Mexico and China, reflecting the geographic spread of electronics component manufacturing. Parts classification under this heading requires demonstrating that the component is solely or principally used with apparatus of heading 8517; parts that serve multiple equipment types may instead fall under the general parts provisions of Chapter 85.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
9.1K import shipments a month
CBP applies the 'solely or principally used' test: a component classifies as a part of heading 8517 apparatus if it has no commercially significant use other than in such apparatus. Generic electronic components (capacitors, connectors) that serve many equipment types typically classify under their own headings. Importers should document the component's design specifications and intended application to support a parts classification.
PCBAs are a frequent classification dispute area. If a PCBA constitutes a functional unit in its own right — for example, a complete modem or router board — CBP may classify it as the finished apparatus rather than as a part. Conversely, a bare board designed exclusively for a specific telephone model is more defensibly a part. A binding ruling is advisable for high-volume PCBA imports to lock in the classification.
Subheading 3 of 9 in heading 8517
Subheading 851779 · $231.0M of $16.5B
Trade Directory
List your company under HS 851779 — Parts for Telephones & Other Voice/Data Transmission Apparatus, so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8517790000 | Part Phone/Oth Apparat Trans/Recept Voice, Img, Data | $231.8M | 10.28% | 79.44% | $23.8M |
Part Phone/Oth Apparat Trans/Recept Voice, Img, Data
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8517790000 | Part Phone/Oth Apparat Trans/Recept Voice, Img, Data | $141.6M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$231.0MYoY · free account
Exports
$141.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $2.2B of Parts for Telephones & Other Voice/Data Transmission Apparatus and exported $1.6B.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
China pays 17.4% duty; Mexico 0.7%.
customs district
destination
entry
rate provision · imports
18.3% enters free of duty; duty collected equals 10.28% of imports for consumption.