That C-curve means it holds through mild inrush — think motor starting or transformer energization — and trips fast on a hard short. That's enough for a 20 A feed on 4 mm² or 6 mm² copper, and the big 25 mm² top end lets you land a main feed if this is the panel's incoming breaker. The terminals are sealable — important if the panel sits in a dust-prone environment or needs a tamper tag for warranty. That covers most control rooms and outdoor enclosures in temperate climates.
Sourced through independent distribution channels. The SENTRON series is widely stocked, so lead times tend to be short for this class of part, but we confirm each order individually.
Panel fit and installation
Mounts in any position on standard DIN rail. The 4-pole body takes 4 width units at 18 mm each — 72 mm of rail space total. Vibration-rated to 50 m/s² at 25–150 Hz and 60 m/s² at 10–150 Hz per IEC 60068-2-6, which means it holds up on a machine frame or near rotating equipment without nuisance tripping. The 440 V insulation voltage gives headroom on a 400 V line. Mechanical life is 20 000 switching cycles typical, which is fine for a distribution breaker that sees infrequent manual operation.