SITCSection 7

Microwave Tubes (Excluding Grid-Controlled Tubes)

Name: Microwave Tubes (Excluding Grid-Controlled Tubes) (SITC 77625) -- U.S. Export Data
Creator: U.S. Census Bureau
License: https://www.census.gov/about/policies/open-gov/open-data.html

SITC 77625Basic heading5-digit

U.S. imports · July 2026: $10.6M; YTD $67.5M

U.S. exports · July 2026: $17.9M

Balance · July 2026: Sign in free to see the trade balance

Sign in free to see the trade balance and the full top 5 in every module.

Balance · July 2026: Loading the trade balance

U.S. exports of microwave tubes (excluding grid-controlled tubes) (SITC 77625) totaled $17.9M in July 2026.

Importers of Microwave Tubes (Excluding Grid-Controlled Tubes) paid $671K in duties in July 2026 — an effective duty rate of 14% on $4.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.

Last updated: July 2026 data

Microwave tubes in SITC 77625 — including traveling-wave tubes (TWTs), magnetrons, klystrons, and crossed-field amplifiers — serve as high-power RF amplification components in radar, satellite communications, electronic warfare, and industrial heating systems. Grid-controlled tubes are excluded, keeping this heading focused on velocity-modulation and crossed-field device types. Many microwave tube variants are subject to export-control regimes in their country of manufacture, and US importers dealing in defense-related variants should assess whether Commerce Department import or export licensing applies.

AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.

108 shipments/mo

12-month trend

ImportsExports

Imports

$10.6MYoY · Pro

Exports

$17.9MYoY · Pro

12-mo low · imports

YoY · Pro

$17.9M$0

June 2025December 2025July 2026

Through July 2026. Source: U.S. Census Bureau.

Suppliers

Supplier Network

Are you a supplier of this product?

Get discovered by U.S. importers searching for HS 77625 — Microwave Tubes (Excluding Grid-Controlled Tubes). Be the first supplier listed.

Balance · July 2026: Sign in free to see the trade balance

Sign in free to see the trade balance and the full top 5 in every module.

Basic heading 411 of 642 in section 7

Share of section 7 imports0.0060%

Basic heading 77625 · $10.6M of $175.6B

Where it comes from, where it lands, what it pays

Exports · July 2026

Countries

destination

Japan and India together take 41% of it.

Sign in free to see the top 5 →

Districts

customs district

Census does not publish district detail for this classification system.

States

origin

Census does not publish state detail for this classification system.

Ports

entry

Census does not publish port detail for this classification system.

Frequently Asked Questions

What distinguishes a microwave tube classified here from a grid-controlled tube?

Grid-controlled tubes (such as triodes and tetrodes used at lower frequencies) modulate electron flow via a physical grid electrode and are excluded from 77625. Microwave tubes under this heading — TWTs, klystrons, magnetrons, and gyrotrons — control electron beams through velocity modulation, resonant cavities, or crossed magnetic and electric fields, enabling operation at microwave frequencies and high power levels that grid-controlled designs cannot achieve.

Do defense-related microwave tubes face additional import or licensing requirements?

Yes. High-power microwave tubes used in radar and electronic warfare are frequently controlled under the US Commerce Control List (CCL) or the US Munitions List (USML). Importers should verify whether the specific tube type and its country of origin trigger an import certificate requirement or whether the foreign exporter needed an export license, as misclassification can result in seizure or penalties.