Product classification
HS code for Signal generator: 8543.20
Electrical machines and apparatus, signal generators.
Classification of signal generator under HS 8543.20
Signal generators are classified under HS code 8543.20 because they are defined as electrical machines and apparatus having individual functions, not specified or included elsewhere in Chapter 85. According to the Explanatory Notes to the Harmonized System, heading 8543 covers a wide range of electrical goods that perform a specific task independently. Signal generators are devices that produce electrical signals with specific waveforms, frequencies, and amplitudes. These signals are used as stimuli for electronic measurements or as a reference for testing electronic equipment. The classification is driven by General Interpretative Rule (GIR) 1, which dictates that classification is determined by the terms of the headings and any relative section or chapter notes. Since signal generators are explicitly named in subheading 8543.20, this specific designation takes precedence over more general headings. It is important to distinguish these from measuring instruments; while a signal generator creates a signal, it does not measure one, which is why it is excluded from Chapter 90.
- Covers
- Radio frequency (RF) signal generators
- Audio frequency (AF) signal generators
- Function generators (sine, square, triangle waves)
- Pulse generators
- Arbitrary waveform generators (AWG)
- Microwave signal generators
- Also under 8543.20
- Keysight 33500B
- Rohde & Schwarz SMB100A
- Tektronix AFG31000
- Anritsu MG3710A
- National Instruments PXIe-5450
- Rigol DG800 series
Codes often confused with 8543.20
Common mistake. Signal generators are frequently misclassified under HS code 9030.40 or 9030.89. These codes refer to instruments and apparatus for measuring or checking electrical quantities. The confusion arises because signal generators are often used alongside oscilloscopes and spectrum analyzers. However, if the primary function is the generation of a signal rather than the measurement of an external signal, 8543.20 is the correct code. Another common error is using 8517.62 for telecommunication signal converters, which are distinct from laboratory signal generators.
Top exporters and importers of HS 854320 (the code used for signal generator), 2025
In 2025, the largest exporter of HS 854320 (the code used for signal generator) in UN Comtrade data was Japan, with 17% of world exports; the largest importer in UN Comtrade data was China, with 14% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 854320, not only signal generator.
Top exporters 2025 · share of world exports
- 1 Japan $380M 17% of world exports
- 2 Malaysia $293M 13% of world exports
- 3 Germany $277M 12% of world exports
World total: $2.2B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $262M 14% of world imports
- 2 Ukraine* ~$245M 13% of world imports · partner records ↗
- 3 United States $141M 7.3% of world imports
World total: $1.9B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for signal generator
Brazil classifies signal generator under NCM 8543.20.00: HS 8543.20 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about signal generator
What is the HS code for Signal generator?
The HS code for Signal generator is 854320 (Electrical machines and apparatus; signal generators). The HS code for a signal generator is 8543.20, which falls under the category of electrical machines and apparatus with individual functions.
How do I classify Signal generator for customs?
Signal generator is classified under HS code 854320 — Electrical machines and apparatus; signal generators. This is a 6-digit subheading level code.
Does this code include software-defined signal generators?
If the product is a standalone hardware unit designed to generate signals, it remains under 8543.20. However, if it is merely software intended for use on a general-purpose computer, it may be classified under 8523 as recorded media.
Which countries are the top exporters of signal generator (HS 854320)?
In 2025, the top exporters of HS 854320 (the code used for signal generator) in UN Comtrade data were Japan ($380M, 17% of world exports), Malaysia ($293M) and Germany ($277M). World exports came to about $2.2B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of signal generator (HS 854320)?
In 2025, the top importers of HS 854320 (the code used for signal generator) in UN Comtrade data were China ($262M, 14% of world imports), Ukraine (about $245M) and the United States ($141M). World imports came to about $1.9B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Signal generator the same in all countries?
The base HS code 854320 for Signal generator is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for signal generator in Brazil?
In Brazil, signal generator (HS 854320) is classified under NCM 8543.20.00.