That E-curve means it's designed for transformer and motor-starting loads where inrush is higher than a standard B or C curve handles — it holds through the magnetizing surge without nuisance tripping, then clears fast on a hard fault. Breaking capacity is 25 kA per EN 60898, so it's rated for commercial and light industrial service entrance panels where fault current runs that high.
Occupies 6 modular width units — plan for that in the panel layout. Degree of pollution 3, overvoltage category IV — this is a main breaker, not a branch device; it sits at the panel infeed where surge exposure is highest.
Thermal derating and wiring
Rated 35 A at 30 °C ambient. Derates to 33.25 A at 40 °C, 31.5 A at 50 °C, and 30.625 A at 55 °C — if the panel runs hot, size the upstream protection accordingly. Terminals accept 2.5 to 50 mm² solid or stranded, with saddle terminals and box-terminal infeed. That 50 mm² top end handles the main feeder cable without pigtails.
The integrated locking slide accepts a padlock, wire seal, or cable tie for lockout/tagout compliance.