What the B-curve 6 A rating means for your panel
The 2CDS251001R0065 is an ABB 1-pole miniature circuit breaker from the System pro M compact S200 series, rated 6 A with a B tripping characteristic. The B curve means the magnetic trip activates at 3-5 times rated current — it clears fast on a short-circuit but tolerates the inrush of resistive or lightly inductive loads without nuisance tripping. That makes it a natural fit for general-purpose distribution circuits, lighting panels, and control transformers in a DIN-rail enclosure. The rated short-circuit breaking capacity Icn is 6 kA per IEC 60898, while the ultimate breaking capacity Icu hits 20 kA per IEC 60947-2 — the higher figure applies when the breaker is part of a motor-circuit or industrial panel covered under the 60947 standard. The rated insulation voltage sits at 440 V, and the overvoltage category is III, meaning it is designed for fixed-installation panels where transient overvoltages from the mains supply are expected.
Mounting, termination, and environmental sealing
The breaker snaps onto a DIN rail and occupies 17.5 mm width per pole — standard 1-module footprint. The bi-directional cylinder-lift terminal accepts copper conductors up to the rated cross-section and requires a tightening torque of 2.8 Nm max. Depth is 69 mm, height 88 mm, so it clears most standard distribution board covers. Ingress protection is IP20 on the front (finger-safe) and IP40 inside the enclosure — the IP40 rating means the installed breaker withstands dust ingress typical of a closed panel, but it is not rated for washdown or outdoor exposure without a secondary enclosure.