Trade & Sourcing
Four Electrical Families Explain 23.83% of the Tracked 2025 Duty Increase
Wire/cable, switchgear/connectors, transformers/power supplies and batteries contributed $11.99 billion of the $50.33 billion increase in reported calculated duties across 57 families in 2024–2025.
Editorial evidence cutoff: September 9, 2026. Published September 29, 2026. Observation periods are stated throughout; older figures are retrospective evidence.
Four electrical product families account for nearly one-quarter of the increase in calculated duties across MFG Calcs' 57-family manufacturing panel between 2024 and 2025. Together, wire and cable, switchgear and connectors, transformers and power supplies, and batteries added $11.99 billion to the recorded bill.
This is a retrospective allocation of a $50.33 billion panel-wide increase. For a manufacturer reviewing September 2026 budgets, its value is in locating where the historical dollars accumulated. It cannot show that every electrical component experienced the same rate, that suppliers passed through the full amount, or that the same pattern will repeat.
The figures were available in the annual data held by the September 9 editorial cutoff. Holding the family definitions constant makes the contribution measurable without turning four selected categories into a claim about the whole electrical industry.
FOUR FAMILIES, $11.99 BILLION OF THE INCREASE
Switchgear and connectors contributed $3.39 billion of the increase. Wire and cable contributed $3.33 billion, transformers and power supplies $2.77 billion, and batteries $2.50 billion. Their combined contribution was 23.83% of the increase across all 57 tracked families.
These are differences between annual calculated-duty dollar totals. They are not four statutory tariff changes added together, and the 23.83% is a share of the increase, not an average tariff rate. Both distinctions matter when a result travels from an analytical article into a purchasing slide.
The USITC DataWeb observations allow the sum to be reconstructed directly. Subtract 2024 calculated duties from 2025 duties for each named family, add the four differences, then divide by the same operation across the full panel. No forecast or extrapolation is required.
THE PANEL SHRANK WHILE ITS DUTY BILL EXPANDED
Customs value across the full panel fell from $576.27 billion in 2024 to $559.30 billion in 2025. Calculated duties rose from $18.80 billion to $69.13 billion. The increase therefore cannot be described simply as the consequence of a larger aggregate import bill.
That does not establish a uniform cause within the four electrical families. Their duty dollars depend on both customs value and the observed duty-to-value ratio. Either factor can change, and each broad family can contain a shifting mix of products and origins.
The four-family grouping is an editorial lens designed around a recognizable set of manufacturing inputs and equipment. It is not an official statistical sector. Other tracked families also supply electrical systems, and these four can serve uses beyond a single industry. The result is precise about the named group and deliberately limited outside it.
THREE VALUE INCREASES AND ONE DECLINE
Wire and cable customs value increased 16.24% between the two years. Transformers and power supplies rose 10.21%, and switchgear and connectors rose 7.73%. Batteries moved in the opposite direction, with customs value down 12.06% despite its $2.50 billion increase in calculated duties.
That contrast prevents a convenient but incomplete explanation. The selected duty contribution was not simply four import expansions being taxed at unchanged rates. The battery result, in particular, shows why the dollar burden needs to be inspected separately from the merchandise value entering the denominator.
Nor should the three positive customs-value changes be called increases in physical demand. Dollar totals can grow because of units, prices or composition. A purchasing team concerned with actual capacity needs quantity and specification evidence before treating these values as proof that more equipment or components were required.
LARGE CONTRIBUTIONS DO NOT IDENTIFY THE MOST EXPENSIVE PART
A family can contribute heavily to the total because it represents a large purchasing base, because its observed rate rises sharply, or both. A smaller family with a high percentage burden may contribute fewer dollars. Ranking dollar changes answers a budget-allocation question, not a universal ranking of tariff severity.
The same issue appears within a company. A tiny component with a striking tariff percentage may matter less to the annual budget than a high-volume input with a moderate change. Conversely, a low-dollar item can still be operationally indispensable. The customs record measures the financial aggregate; it does not measure how easily a factory can replace the part.
This is why the four-family result is most useful beside a bill of materials and spending weights. It identifies historically consequential areas for examination. It does not establish which line should receive engineering effort, which supplier can be changed, or which product will constrain production.
WHAT THE FIGURES SAY ABOUT SEPTEMBER PLANNING
A retrospective budget review can compare the company's electrical purchasing exposure with the composition of these four families. If the business is concentrated in one, the overall manufacturing average may conceal the relevant historical pressure. If its specifications sit outside the tracked coverage, the four-family percentage may be only background context.
The appropriate next layer is to separate product value, calculated duty and transport-related charges within the company's actual records. Combining them too early obscures which assumption changed. The public data can serve as an external point of comparison while the company's matched entries establish its own experience.
Historical concentration can also guide scrutiny of forecasts. A model that applies one rate to all manufacturing imports needs to explain how it handles the electrical mix. It cannot be considered representative merely because its total resembles the panel total; offsetting errors may hide large discrepancies in particular categories.
A MEASURABLE CONTRIBUTION, WITH BOUNDARIES
The annual observations are carried forward from the September 6, 2026 data fetch and restricted here to calendar 2024 and 2025. The calculation keeps all 57 families in the denominator, avoiding a comparison between a selected numerator and an incomplete peer list.
The Census statistical definitions describe calculated duties as a statistical measure rather than a verified ledger of duty payments. Company pass-through, final settlements and legal entry treatment therefore remain separate questions. Nothing in the four-family sum identifies who ultimately absorbed the costs.
The defensible conclusion is narrower and more useful than a blanket claim about electrical manufacturing. Four specified groups explain $11.99 billion of the historical increase in this panel. Their different value paths show why September 2026 planning needs category-level evidence, clear denominators and current entry facts before turning a national pattern into a company budget.
Sources and evidence
Evidence period: 2024 to 2025, 57 tracked families. The frozen evidence record lists the source files and verified hashes available September 9, 2026. Source revision: 5e4fb7726c3d40060c0151c086c903baae856cab. Later live-data updates do not alter the historical evidence in this article.
census.gov/foreign-trade/guide/sec2.html
Published 2026-09-29.