Market evolution: Transformer parts (CN 850490) — 2015–2025

Introduction

This report examines the evolution of EU extra-EU trade in products classified under CN 850490 — Parts of electrical transformers and inductors, n.e.s. over the period 2015–2025. This heading bundles four subcategories: ferrite cores (85049011), steel laminations and cores (85049013), parts of transformers and inductors n.e.s. (85049017), and parts of static converters (85049090). The period under review has been marked by the energy transition, the electrification of transport, the expansion of data-centre infrastructure, and a series of geopolitical disruptions. Against this backdrop, the EU's trade position in transformer parts has undergone a dramatic structural transformation, characterised by surging import dependence, a shifting geographical landscape, and a significant expansion of domestic production.

1. A structural reversal: the EU moves from net exporter to net importer

The trade balance flipped decisively over the decade

The most striking feature of the 2015–2025 period is the complete reversal of the EU's trade balance in transformer parts. In 2015, the EU recorded a trade surplus of approximately €553 million. By 2025, this had turned into a deficit of roughly €167 million — a swing of over €720 million. The deficit peaked at around €279 million in one intermediate year before narrowing somewhat, but the directional shift is unambiguous. The EU's net import reliance moved from −41% (i.e., a strong net-export position) to +2% (a net-import position), crossing the zero line decisively.

Imports surged in both value and volume while export growth remained modest

The asymmetry of the balance shift is explained by radically different growth trajectories on the import and export sides:

Imports more than tripled in volume and more than doubled in value, even as unit prices fell by nearly a third. This combination points to a large-scale influx of lower-cost parts, most likely from Asian manufacturers benefiting from economies of scale. By contrast, EU exports grew only marginally in tonnage (+6.6%) but achieved a 20.5% price increase, suggesting the EU has been shifting towards higher-value-added, specialised output — consistent with the rising EU production value (from €578 million to €2,514 million, +335%).

The EU's outward orientation in this product category has weakened

Further evidence of this structural shift comes from trade intensity and export propensity indicators. Trade intensity fell from 63% to 39%, and export propensity declined from 54% to just 24%. As domestic demand for transformer parts has grown rapidly (driven by grid upgrades, renewables integration, and EV charging infrastructure), a growing share of EU output is being absorbed domestically rather than exported, while imports fill an expanding portion of internal demand.

2. Geographical realignment: China's dominance and the rise of new suppliers

China consolidated its position as the EU's primary import source

China was already the largest supplier of transformer parts to the EU in 2015, with imports worth €326 million. By 2025, that figure had climbed to €934 million (+186%), making China by far the dominant source at nearly half of total extra-EU imports. This concentration is reflected in the rising import Herfindahl-Hirschman Index (HHI), which increased from 2,100 to 2,744 over the period — crossing into what trade economists typically classify as a "moderately concentrated" market structure.

Türkiye and the United Arab Emirates emerged as fast-growing secondary suppliers

While China's growth was substantial in absolute terms, the most dramatic relative increases came from other partners. Imports from Türkiye surged from €43 million to €263 million (+513%), likely reflecting Türkiye's growing role as a near-shoring destination and its own expanding transformer manufacturing base. Imports from the UAE exploded from just €5 million to €59 million (+1,126%), possibly linked to re-export activity or regional manufacturing hubs. By contrast, imports from the United Kingdom fell from €153 million to €64 million (−59%), a decline plausibly associated with post-Brexit trade frictions and supply-chain reconfiguration.

The following table summarises the evolution of the top seven import partners:

EU export geography shifted towards the US and UK, while China-bound exports declined

On the export side, the United States became the EU's largest single destination, with exports rising from €210 million to €458 million (+118%). The UK also grew strongly as a destination, from €73 million to €169 million (+132%). Meanwhile, exports to China declined from €300 million to €183 million (−39%) — a pattern consistent with China's increasing self-sufficiency in transformer component manufacturing. The export HHI remained relatively low (rising modestly from 911 to 1,055), indicating that EU exports remained diversified across a broad range of partners.

Germany anchors EU trade, while Central and Eastern European members scaled up

Among EU Member States, Germany dominated both imports (€372 million in 2025) and exports (€492 million), though its exports actually contracted slightly (−3.5%). The most striking growth came from Poland, whose imports surged from €34 million to €221 million (+550%), and Spain, which saw imports jump from €18 million to €153 million (+763%). These patterns likely reflect the relocation of downstream assembly activities (e.g., power electronics, EV chargers) into Central and Southern Europe, with parts sourced externally. Italy also saw strong growth on both the import side (+166%) and the export side (+90%), confirming its role as a key intermediate hub in the transformer-parts value chain.

3. Segment dynamics: converter parts dominate while ferrite cores decline

Parts of static converters represent the largest and most valuable product segment

The product segment breakdown reveals that subheading 85049090 ("Parts of static converters") is by far the dominant category by value on both the import and export sides. In 2025, imports of this sub-category reached approximately €1,181 million, and exports totalled €1,094 million. Its high unit prices — averaging €24,106/t on the import side and €57,488/t on the export side — reflect the technical complexity and higher value-added nature of converter components compared to passive parts such as ferrite cores or steel laminations. The EU runs a structural trade deficit in this segment (approximately €87 million in 2025), consistent with the growing demand for power-conversion electronics driven by renewable energy integration and electromobility.

Steel laminations and transformer parts recorded the fastest import growth

The two sub-categories that saw the most explosive import growth in volume terms were 85049013 ("Steel laminations and cores") and 85049017 ("Parts of transformers and inductors, n.e.s."). Available quantity data (from 2021 onward) shows:

Steel-lamination imports roughly doubled in just four years, likely reflecting the massive demand for power-distribution and grid transformers associated with Europe's energy transition. Notably, this sub-category also saw its import unit price decline from €2,971/t to €3,860/t over the same period, while export prices remained range-bound — suggesting increasing price competition from low-cost producers.

Ferrite cores buck the trend with declining trade volumes

In contrast to the broader growth trend, ferrite cores (85049011) saw both import and export volumes decline. Export volumes fell from 10,103 tonnes in 2015 to just 3,934 tonnes in 2025 (−61%), and export value dropped from €133 million to €64 million (−52%). Import volumes for ferrite cores also declined from a peak of ~18,539 tonnes in 2022 to 8,592 tonnes in 2025, though import values remained relatively stable at €91 million (helped by rising unit prices from €6,501/t in 2020 to €10,570/t in 2025). This segment appears to be maturing, with technological substitution (e.g., toward advanced nanocrystalline or amorphous cores) potentially reducing the overall trade footprint of traditional ferrite products.

EU domestic production expanded significantly, but import penetration deepened

EU production of transformer parts grew strongly: production value rose from €578 million to €2,514 million (+335%), and production quantity from 44,847 tonnes to 125,411 tonnes (+180%). Despite this expansion, imports grew even faster, meaning that import penetration deepened over the period. This suggests that domestic demand growth — propelled by grid modernisation, data-centre construction, and electrification — outpaced the capacity of EU-based producers to expand, leaving room for foreign suppliers to fill the gap.

Conclusion

Over the 2015–2025 decade, the EU's trade in transformer parts (CN 850490) has undergone a fundamental transformation. The bloc shifted from a position of comfortable net exporter to one of modest net importer, driven by a 238% surge in import volumes that far outstripped the 7% growth in export tonnage. China consolidated its role as the dominant supplier, while Türkiye and the UAE emerged as fast-growing secondary sources — a geographical diversification that nonetheless coexists with rising import concentration (HHI). On the export side, the EU re-oriented towards the United States and the United Kingdom while retreating from the Chinese market. Segment-level data shows that demand has been strongest for steel laminations and static-converter parts, while ferrite cores have entered a structural decline. EU domestic production scaled up impressively in value terms, but the sheer pace of demand growth — linked to the energy transition and digitalisation — has ensured that imports continue to capture an expanding share of the market. These trends carry implications for EU industrial policy, particularly regarding supply-chain resilience in components critical to energy infrastructure.