Product classification
HS code for Dielectric furnace: 8514.20
Furnaces and ovens, electric, for industrial or laboratory use, functioning by induction or dielectric loss.
Classification of dielectric furnace under HS 8514.20
Dielectric furnaces are classified under HS code 8514.20 as they utilize dielectric loss to generate heat within non-conductive materials. This code specifically covers industrial or laboratory electric furnaces and ovens that function through induction or dielectric loss. The classification is based on the heating method rather than the specific material being processed. These units are distinct from resistance-heated furnaces because they use high-frequency electromagnetic fields to excite molecules within the workload, providing rapid and uniform heating throughout the volume of the material. This process is highly efficient for materials like plastics, wood, or ceramics that do not conduct electricity well. The classification follows GRI 1, as the heading 8514 specifically describes electric industrial or laboratory furnaces. Subheading 8514.20 is the specific location for those operating via dielectric loss. These furnaces are often used in specialized manufacturing processes such as curing resins, drying timber, or heating preforms in the plastics industry. The technical requirement for classification here is that the equipment must be an oven or furnace, meaning an enclosed space where the material is treated. The high-frequency generators used to power these furnaces are typically integrated into the unit, making the entire assembly a single functional unit under Chapter 85.
- Covers
- High-frequency dielectric ovens
- Radio-frequency (RF) furnaces
- Industrial microwave ovens for laboratory use
- Dielectric curing chambers for polymers
- Vacuum dielectric furnaces
- Also under 8514.20
- Inductotherm Induction Furnaces
- Ambrell Induction Heating Systems
- Radyne Induction Heating
- Sairem Microwave Ovens
- GH Induction Atmospheres
Codes often confused with 8514.20
Common mistake. A common misclassification occurs with HS code 8514.10, which is reserved for resistance-heated furnaces. While both are electric furnaces, the physical mechanism of heat generation is different. Another frequent error is using HS code 8514.40, which covers dielectric heating equipment that is not a furnace or oven. If the equipment does not have an enclosed heating chamber, it must be moved to 8514.40. Additionally, domestic microwave ovens are classified under 8516.50 and should not be confused with industrial dielectric furnaces.
Top exporters and importers of HS 851420 (the code used for dielectric furnace), 2025
In 2025, the largest exporter of HS 851420 (the code used for dielectric furnace) in UN Comtrade data was China, with 27% of world exports; the largest importer in UN Comtrade data was the United States, with 7.4% 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 851420, not only dielectric furnace.
Top exporters 2025 · share of world exports
- 1 China $159M 27% of world exports
- 2 Germany $88M 15% of world exports
- 3 Italy $58M 9.8% of world exports
World total: $594M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $56M 7.4% of world imports
- 2 Oman $42M 5.6% of world imports
- 3 China $42M 5.5% of world imports
World total: $750M 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 dielectric furnace
Brazil splits HS 8514.20 into 3 NCM codes. Pick the one that matches your product:
- 8514.20.11Industrial induction furnaces
- 8514.20.19Other induction furnaces
- 8514.20.20Dielectric loss furnaces
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about dielectric furnace
What is the HS code for Dielectric furnace?
The HS code for Dielectric furnace is 851420 (Furnaces and ovens; electric, for industrial or laboratory use, functioning by induction or dielectric loss). The HS code for an industrial or laboratory dielectric furnace is 8514.20.
How do I classify Dielectric furnace for customs?
Dielectric furnace is classified under HS code 851420 — Furnaces and ovens; electric, for industrial or laboratory use, functioning by induction or dielectric loss. This is a 6-digit subheading level code.
How does a dielectric furnace differ from an induction furnace?
While both are in 8514.20, induction furnaces heat conductive materials (like metals) via magnetic fields, whereas dielectric furnaces heat non-conductive materials (like polymers) via high-frequency electric fields.
Which countries are the top exporters of dielectric furnace (HS 851420)?
In 2025, the top exporters of HS 851420 (the code used for dielectric furnace) in UN Comtrade data were China ($159M, 27% of world exports), Germany ($88M) and Italy ($58M). World exports came to about $594M, 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 dielectric furnace (HS 851420)?
In 2025, the top importers of HS 851420 (the code used for dielectric furnace) in UN Comtrade data were the United States ($56M, 7.4% of world imports), Oman ($42M) and China ($42M). World imports came to about $750M, 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 Dielectric furnace the same in all countries?
The base HS code 851420 for Dielectric furnace 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 dielectric furnace in Brazil?
Brazil splits HS 851420 into 3 NCM codes, so the right one for dielectric furnace depends on the product's details: 8514.20.11 (Industrial induction furnaces), 8514.20.19 (Other induction furnaces), 8514.20.20 (Dielectric loss furnaces).