Power fuse and grid reliability statistics

Key numbers

• 68.4%of US imports of fuses rated over 1,000 volts came from Mexico in 2025 ($204.4 million in all)Source: US Census Bureau, 2025
• 7.6%calculated duty as a share of the value of those imports in 2025, up from 3.2% in 2024Source: US Census Bureau, 2024 and 2025
• 262.6minutes without power for the average US electricity customer in 2025 (120.8 without major events)Source: EIA, 2025
• 12.3major mechanical failures per million vehicle revenue miles on US heavy rail, light rail, streetcar and commuter rail in 2025 (13.4 in 2022)Source: FTA National Transit Database, 2025

US fuse imports

From our study Where America's power fuses come from: US fuse imports by country, 2019 to 2025, which has the full tables, method and limits.

• $204.4 millionUS imports of fuses rated over 1,000 volts (HS 8535.10) in 2025, up 43.8% from $142.1 million in 2019.Period: 2025. Source: US Census Bureau, international trade data (imports by HS commodity).
• 68.4%Mexico's share of those imports in 2025 ($139.8 million).Period: 2025. Source: US Census Bureau, international trade data (imports by HS commodity).
• 79.4%Share supplied by Mexico and the Dominican Republic together in 2025.Period: 2025. Source: US Census Bureau, international trade data (imports by HS commodity).
• 44Countries that supplied fuses rated over 1,000 volts to the US in 2025.Period: 2025. Source: US Census Bureau, international trade data (imports by HS commodity).
• 5.6%China's share in 2025, down from 9.0% in 2024.Period: 2024 and 2025. Source: US Census Bureau, international trade data (imports by HS commodity).
• 7.6%Duty calculated by the Census Bureau as a share of the value of imported fuses over 1,000 volts in 2025, up from 3.2% in 2024.Period: 2024 and 2025. Source: US Census Bureau, international trade data (imports by HS commodity).
• 56.3%The same duty share on fuses from China in 2025, up from 27.4% in 2024.Period: 2024 and 2025. Source: US Census Bureau, international trade data (imports by HS commodity).
• $22.79Average declared value of an imported fuse rated 2,300 volts or more (HTS 8535.10.0020) in 2025, against $14.32 in 2019, before duty.Period: 2019 and 2025. Source: US Census Bureau, international trade data (imports by HS commodity).
• $203.2 millionImports of fuses over 1,000 volts from January to September 2026, 35.5% more than the $150.0 million in the same months of 2025.Period: January to September 2026. Source: US Census Bureau, international trade data (imports by HS commodity).
• $374.3 millionUS imports of fuses rated 1,000 volts or less (HS 8536.10) in 2025; Mexico supplied 66.3%.Period: 2025. Source: US Census Bureau, international trade data (imports by HS commodity).

Power outages

From our study Which states have the longest power outages? SAIDI and SAIFI by state, 2015 to 2025, which has the full tables, method and limits.

• 262.6 minutesAverage time a US electricity customer spent without power in 2025, major events included (611.3 minutes in 2024).Period: 2025. Source: US Energy Information Administration, Electric Power Annual Tables 11.1 to 11.5 (Form EIA-861).
• 120.8 minutesThe same 2025 average with major event days taken out.Period: 2025. Source: US Energy Information Administration, Electric Power Annual Tables 11.1 to 11.5 (Form EIA-861).
• 54.0%Share of US customer outage minutes in 2025 that came on major event days.Period: 2025. Source: US Energy Information Administration, Electric Power Annual Tables 11.1 to 11.5 (Form EIA-861).
• 1.34Average number of interruptions per US customer in 2025 (1.25 in 2015).Period: 2015 and 2025. Source: US Energy Information Administration, Electric Power Annual Tables 11.1 to 11.5 (Form EIA-861).
• 1,013.2 minutesWest Virginia's 2025 average, about 16.9 hours and the longest of the 51 states (counting the District of Columbia).Period: 2025. Source: US Energy Information Administration, Electric Power Annual Tables 11.1 to 11.5 (Form EIA-861).
• 27.8%Rise in the US average from 311.7 minutes a year in 2015 to 2019 to 398.3 in 2021 to 2025; without major events the rise was 5.5%.Period: 2015 to 2025. Source: US Energy Information Administration, Electric Power Annual Tables 11.1 to 11.5 (Form EIA-861).
• 38 of 51States (counting the District of Columbia) with a higher average in 2021 to 2025 than in 2015 to 2019.Period: 2015 to 2025. Source: US Energy Information Administration, Electric Power Annual Tables 11.1 to 11.5 (Form EIA-861).
• 94.7%Share of US electricity customers served by utilities that reported reliability figures for 2025.Period: 2025. Source: US Energy Information Administration, Electric Power Annual Tables 11.1 to 11.5 (Form EIA-861).

Rail transit breakdowns

From our study Rail transit breakdowns: major mechanical failures by agency, 2022 to 2025, which has the full tables, method and limits.

• 14,633Major mechanical failures reported on US heavy rail, light rail, streetcar and commuter rail in 2025, over 1,192 million vehicle revenue miles.Period: 2025. Source: Federal Transit Administration, National Transit Database, 2022 - 2025 Annual Data - Breakdowns.
• 12.3Major failures per million vehicle revenue miles across those systems in 2025, against 13.4 in 2022.Period: 2022 and 2025. Source: Federal Transit Administration, National Transit Database, 2022 - 2025 Annual Data - Breakdowns.
• 95.0Light rail major failures per million train revenue miles in 2025, against 68.9 for heavy rail and 29.5 for commuter rail.Period: 2025. Source: Federal Transit Administration, National Transit Database, 2022 - 2025 Annual Data - Breakdowns.
• 176.3Highest rate per million vehicle revenue miles among the 19 light rail systems with at least 1 million vehicle revenue miles in 2025: Pittsburgh Regional Transit.Period: 2025. Source: Federal Transit Administration, National Transit Database, 2022 - 2025 Annual Data - Breakdowns.

About these statistics

Every statistic on this page is taken from one of the DENCO Fuses studies linked above, and each study is built from public government files by a script kept with the site's source. Each statistic names the period it covers and its original source, so you can quote the source directly. Figures are the latest available when the studies were built; data fetched up to 12 Nov 2026.

Sources

• US Census Bureau, International Trade API: imports by HS commodity. Period used: January 2019 to September 2026.
• US Energy Information Administration, Electric Power Annual, Tables 11.1, 11.3, 11.4 and 11.5. Period used: 2015 to 2025.
• Federal Transit Administration, National Transit Database: 2022 - 2025 NTD Annual Data - Breakdowns (data and column definitions). Period used: Report years 2022 to 2025.

Limits

• Each topic has its own limits, set out on its study page: trade data do not measure US production, outage figures cover only reporting utilities, and the transit figures do not say which part failed.
• The three data sets measure different things and are not linked. Nothing here connects fuse imports to outages or to rail breakdowns.

Cite this study

DENCO Fuses (2026). Power fuse and grid reliability statistics. https://dencofuses.com/research/power-fuse-grid-reliability-statistics/

The table behind this study is free to reuse under CC BY 4.0: credit DENCO Fuses and link to this page. Download the data (CSV).