Fuse Tools
Technical Reference Tool
Motor Circuit Protection Selector
Look up fuse sizing, disconnect, NEMA starter, wire AWG, and conduit for motor branch circuits. Sourced from Bussmann motor circuit protection tables aligned with NEC Article 430.
Reference tool — verify before installing. Always confirm selections against the current National Electrical Code, motor nameplate data, controller manufacturer's overload tables, and local codes. Specific installation conditions may require different sizing. This tool is not a substitute for professional engineering judgment.
Full coverage. 11 voltage/phase combinations covered: Three-Phase 200V, 208V, 230V, 460V, 575V · Single-Phase 115V, 230V · DC 90V, 120V, 180V, 240V. Source: Bussmann SPD Section 12 / NEC Article 430.
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Motor Type
Reference Chart
Fuse Cross-Reference
Translate fuse catalog numbers between Mersen, Bussmann, Littelfuse, and Edison. Type any part number, class, or description into the search box — or browse the full chart below.
Verify before substituting. Cross-referenced fuses share form factor and electrical class but may differ in specific characteristics (interrupting rating, time-current curves, certifications). Always check the datasheet for your application before swapping brands.
Can't find what you need?
Call us — we can cross any fuse, even if it's not on this chart
(708) 756-5600
Or stop by 103 N. Halsted St., Chicago Heights, IL
Mechanical Reference
European Fuse Dimensions
Form factors, body sizes, and dimensions for European fuse types. Useful when servicing imported equipment, sizing fuse holders, or identifying unfamiliar fuses on industrial machinery.
Dimensions are nominal. Always verify exact dimensions against the specific manufacturer's datasheet before ordering fuse holders, busbars, or panel cutouts. Tolerances vary by manufacturer.
Need to identify a specific fuse?
Bring it in — we'll measure it and find the replacement
(708) 756-5600
Or stop by 103 N. Halsted St., Chicago Heights, IL
