Build 4.0.0-rc1 is a release candidate for evaluation. It is not advertised as a complete verified manufacturer database.
Included functionality
- Browser-based IEC numerical screening and Pro UL/NEC screening.
- Comparison of up to three independent devices at the same supplied fault current.
- Peak let-through and total-clearing I²t plots from supplied curve points, with inspectable source points and interpolation brackets.
- Device and cable thermal-profile entry; JSON library import/export.
- Up to 20 project snapshots in this browser, plus portable JSON export. Each snapshot includes its inputs and library data.
- Pro server-recomputed evidence reports with inputs, criteria, source references, plots and data version; use browser Print / Save as PDF.
- A limited real starter reference catalogue with explicit coverage and gaps.
Before purchasing
You receive a Gumroad license key for the hosted Pro features. Activation requires an internet connection; custom/real comparison and reports require the server. A hosted license is not a desktop application, a source-code sale or an offline perpetual executable. The checkout must state the access term, supported version, support/update commitments and refund terms before purchase. No lifetime hosting or delivery of roadmap items is promised here.
Read exact catalogue coverage before buying for a particular device. The comparison features remain useful with your own appropriately sourced data; they do not supply missing manufacturer curves.
Intended use
For qualified electrical professionals performing preliminary numerical screening and documenting their evidence. Confirm source applicability and independently review the final installation. Results do not certify safety or compliance and do not authorize energisation.
Customer rights
These scope statements explain the tool; they do not waive statutory consumer rights or exclude liability that cannot legally be excluded. Product descriptions, data provenance and versioned reports support transparency, but cannot prevent a person from bringing a claim.
Calculation method · Data handling · Purchase / activate a license