Fuse and grid research
Data studies on the market for power fuses and on the reliability of the grids and rail systems they protect. Each study is built from public government data. Every figure names its source and the period it covers, and the table behind it is free to download.
Studies
22
dated statistics on fuse imports, power outages and rail transit breakdowns, each with its source
Power fuse and grid reliability statistics
Published 12 Nov 2026 · CSV
68.4%
of US imports of fuses rated over 1,000 V came from Mexico in 2025 ($204.4 million in all)
Where America's power fuses come from: US fuse imports by country, 2019 to 2025
Published 12 Nov 2026 · CSV
1,013.2 min
average time without power per customer in West Virginia in 2025 (US: 262.6 min)
Which states have the longest power outages? SAIDI and SAIFI by state, 2015 to 2025
Published 12 Nov 2026 · CSV
12.3
major mechanical failures per million vehicle revenue miles on US heavy rail, light rail, streetcar and commuter rail in 2025 (13.4 in 2022)
Rail transit breakdowns: major mechanical failures by agency, 2022 to 2025
Published 12 Nov 2026 · CSV
How we work
- Every number comes from a script run on the source files, not typed by hand. The scripts and files are kept so each figure can be rebuilt.
- Each headline figure is checked a second time against the publisher's own tables or a second source before it is published.
- We report what the data shows and say what it cannot show. No study claims that fuses, or any product, prevent outages or failures.
Sources used
- US Census Bureau, International Trade API: imports by HS commodity
- US Energy Information Administration, Electric Power Annual, Tables 11.1, 11.3, 11.4 and 11.5
- US Energy Information Administration, Form EIA-861 annual detailed data (reliability file, used to check)
- Federal Transit Administration, National Transit Database: 2022 - 2025 NTD Annual Data - Breakdowns (data and column definitions)
- Federal Transit Administration, National Transit Database: 2022 - 2025 NTD Annual Data - Service (used to check)
Using this research
Journalists, researchers and engineers are welcome to quote these studies and reuse the data under CC BY 4.0. Please credit DENCO Fuses and link to the study page. Each study has a suggested citation at the end.
Need a fuse?
DENCO Fuses supplies medium and high voltage fuses for utilities, industry and rail transit, including replacements for hard-to-find and discontinued parts.