Type 1 / Class I SPD test waveform (direct-lightning current); Type 2 / Class II uses 8/20 µs
10/350 µsobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| As of | 2025-06-18 |
| Source | IEC 61643-11:2025 (AC SPDs, published 2025-06-18); IEC 61643-41:2025 (DC low-voltage SPDs, published 2025-05-23); waveform values from the DEHN Surge Protection Catalogue 2025 · IEC catalogue entries give edition, date and AC/DC scope. Waveform evidence: DEHN 2025 catalogue, Type 1 combined-arrester tables (PDF pp.265-266, 10/350 µs) and Type 2 tables (PDF p.274, 8/20 µs). IEC 61643-41:2025: https://webstore.iec.ch/en/publication/27917 |
| Review | checking…review by 2027-06-30 · standard cadence |
| Recorded changes | last 2026-10-13 · 3 revisions tracked |
| Claim id | type-1-class-i-spd-test-waveform-direct |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.