HS code · 6-digit subheading
HS Code 8504.34 – Transformers; n.e.c. in item no. 8504.2, having a power handling capacity exceeding 500kVA
HS code 8504.34 is the 6-digit subheading for transformers, n.e.c. in item no. 8504.2, having a power handling capacity exceeding 500kVA. It is used for dry-type power transformers (>500kVA), cast resin transformers (>500kVA), gas-insulated transformers (>500kVA), medium voltage transformers (>500kVA) and high voltage transformers (>500kVA).
What HS 8504.34 covers
This HS code specifically covers power transformers with a capacity exceeding 500 kVA, excluding liquid dielectric transformers (which fall under 8504.2). These large-capacity transformers are essential components in electrical grids, industrial power distribution, and large-scale renewable energy projects, facilitating the efficient transmission and distribution of electricity. They are critical for stepping up or stepping down voltage levels in substations, factories, and power plants. Major importers are typically countries undergoing significant infrastructure development, industrial expansion, or grid modernization, such as the United States, China, India, and various developing nations in Africa and Southeast Asia. Leading exporters include countries with advanced electrical equipment manufacturing capabilities, like Germany, Japan, South Korea, and China. Trade in these transformers involves complex logistics due to their size and weight, and specifications like voltage ratings, impedance, and cooling methods are paramount.
- Covers
- Dry-type power transformers (>500kVA)
- Cast resin transformers (>500kVA)
- Gas-insulated transformers (>500kVA)
- Medium voltage transformers (>500kVA)
- High voltage transformers (>500kVA)
- Distribution transformers (>500kVA, non-liquid dielectric)
- Industrial power transformers (>500kVA)
- Examples
- Siemens dry-type transformers
- ABB cast resin transformers
- GE Power transformers
- Schneider Electric MV transformers
Codes often confused with 8504.34
Common mistake. This code is distinct from liquid dielectric transformers (8504.2) and smaller capacity transformers (8504.31, 8504.32, 8504.33), specifically covering non-liquid dielectric types exceeding 500 kVA.
Top exporters and importers of HS code 850434, 2025
In 2025, the largest exporter of HS code 850434 in UN Comtrade data was China, with 20% of world exports; the largest importer in UN Comtrade data was the United States, with 21% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 China $542M 20% of world exports
- 2 Italy $366M 14% of world exports
- 3 Germany $252M 9.4% of world exports
World total: $2.7B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $681M 21% of world imports
- 2 Poland $261M 8.0% of world imports
- 3 Germany $207M 6.3% of world imports
World total: $3.3B 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 code for 8504.34
Brazil does not split HS 8504.34: its NCM code is 8504.34.00.
All Brazil NCM codes in heading 85.04 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 8504.34
What is HS code 850434?
HS code 850434 is a 6-digit subheading in the Harmonized System that covers: Transformers; n.e.c. in item no. 8504.2, having a power handling capacity exceeding 500kVA. This HS code specifically covers power transformers with a capacity exceeding 500 kVA, excluding liquid dielectric transformers (which fall under 8504.2). These large-capacity transformers are essential components in electrical grids, industrial power distribution, and large-scale renewable energy projects, facilitating the efficient transmission and distribution of electricity. They are critical for stepping up or stepping down voltage levels in substations, factories, and power plants. Major importers are typically countries undergoing significant infrastructure development, industrial expansion, or grid modernization, such as the United States, China, India, and various developing nations in Africa and Southeast Asia. Leading exporters include countries with advanced electrical equipment manufacturing capabilities, like Germany, Japan, South Korea, and China. Trade in these transformers involves complex logistics due to their size and weight, and specifications like voltage ratings, impedance, and cooling methods are paramount.
What products fall under HS code 850434?
Dry-type power transformers (>500kVA), Cast resin transformers (>500kVA), Gas-insulated transformers (>500kVA), Medium voltage transformers (>500kVA), High voltage transformers (>500kVA), Distribution transformers (>500kVA, non-liquid dielectric), Industrial power transformers (>500kVA)
What are common misclassifications for HS code 850434?
This code is distinct from liquid dielectric transformers (8504.2) and smaller capacity transformers (8504.31, 8504.32, 8504.33), specifically covering non-liquid dielectric types exceeding 500 kVA.
Which countries are the top exporters of goods under HS code 850434?
In 2025, the top exporters of HS code 850434 in UN Comtrade data were China ($542M, 20% of world exports), Italy ($366M) and Germany ($252M). World exports came to about $2.7B, 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 goods under HS code 850434?
In 2025, the top importers of HS code 850434 in UN Comtrade data were the United States ($681M, 21% of world imports), Poland ($261M) and Germany ($207M). World imports came to about $3.3B, 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.
How is HS code 850434 structured?
HS code 850434 is a 6-digit subheading under the Harmonized System. The first 2 digits (85) identify the chapter, digits 3-4 (04) identify the heading, and digits 5-6 (34) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 850434?
In Brazil, HS code 850434 is NCM 8504.34.00. The last two digits are 00 because Brazil does not split this HS code further.