Product classification
HS code for Diac: 8541.30
Electrical apparatus, thyristors, diacs and triacs, other than photosensitive devices.
Classification of diac under HS 8541.30
A Diac (Diode for Alternating Current) is classified under HS code 8541.30. This classification is governed by the technical nature of the device as a semiconductor. Heading 8541 covers diodes, transistors, and similar semiconductor devices. Subheading 8541.30 specifically groups thyristors, diacs, and triacs together, excluding photosensitive devices. A diac is a bidirectional trigger diode that conducts current only after its breakdown voltage has been exceeded. It is a passive semiconductor switch that is commonly used to trigger triacs in AC control circuits, such as light dimmers or motor speed controllers. Because it is a semiconductor device that functions as a switch rather than a simple rectifier or amplifier, it is grouped with other power-control semiconductors like thyristors rather than standard signal diodes.
- Covers
- Trigger diacs
- Silicon bilateral switches (SBS)
- Symmetrical trigger diodes
- Power control diacs for dimming circuits
- Also under 8541.30
- BT136 TRIAC
- MOC3021 Opto-TRIAC
- 2N6509 SCR
- DB3 DIAC
- Teccor S6008L SCR
Codes often confused with 8541.30
Common mistake. Diacs are often misclassified under 8541.10, which is the code for standard diodes. While a diac is a type of diode, the HS nomenclature provides a more specific subheading (8541.30) for diacs, triacs, and thyristors. Another potential error is 8541.21 or 8541.29, which are reserved for transistors. Importers must ensure that the device is identified as a bidirectional trigger member of the thyristor family to justify the use of 8541.30.
Top exporters and importers of HS 854130 (the code used for diac), 2025
In 2025, the largest exporter of HS 854130 (the code used for diac) in UN Comtrade data was China, with 26% of world exports; the largest importer in UN Comtrade data was China, with 15% 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 854130, not only diac.
Top exporters 2025 · share of world exports
- 1 China $397M 26% of world exports
- 2 Germany $244M 16% of world exports
- 3 Hong Kong $170M 11% of world exports
World total: $1.5B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $215M 15% of world imports
- 2 Germany $206M 14% of world imports
- 3 Hong Kong $199M 14% of world imports
World total: $1.5B 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 that did not report are estimated from what other countries recorded trading with them. 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 codes for diac
Brazil splits HS 8541.30 into 4 NCM codes. Pick the one that matches your product:
- 8541.30.11Unmounted thyristors, diacs, triacs, 3 A or less
- 8541.30.19Unmounted thyristors, diacs, triacs, over 3 A
- 8541.30.21Mounted thyristors, diacs, triacs, 3 A or less
- 8541.30.29Mounted thyristors, diacs, triacs, over 3 A
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about diac
What is the HS code for Diac?
The HS code for Diac is 854130 (Electrical apparatus; thyristors, diacs and triacs, other than photosensitive devices). The HS code for a Diac semiconductor device is 8541.30.
How do I classify Diac for customs?
Diac is classified under HS code 854130 — Electrical apparatus; thyristors, diacs and triacs, other than photosensitive devices. This is a 6-digit subheading level code.
Are Triacs and Diacs under the same HS code?
Yes, both Diacs and Triacs are classified under HS code 8541.30 as they are both part of the thyristor family of semiconductor switches.
Which countries are the top exporters of diac (HS 854130)?
In 2025, the top exporters of HS 854130 (the code used for diac) in UN Comtrade data were China ($397M, 26% of world exports), Germany ($244M) and Hong Kong ($170M). World exports came to about $1.5B, 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 diac (HS 854130)?
In 2025, the top importers of HS 854130 (the code used for diac) in UN Comtrade data were China ($215M, 15% of world imports), Germany ($206M) and Hong Kong ($199M). World imports came to about $1.5B, 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 Diac the same in all countries?
The base HS code 854130 for Diac 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 diac in Brazil?
Brazil splits HS 854130 into 4 NCM codes, so the right one for diac depends on the product's details: 8541.30.11 (Unmounted thyristors, diacs, triacs, 3 A or less), 8541.30.19 (Unmounted thyristors, diacs, triacs, over 3 A), 8541.30.21 (Mounted thyristors, diacs, triacs, 3 A or less), 8541.30.29 (Mounted thyristors, diacs, triacs, over 3 A).