Specification and fit
The ABB S204-C63 is a 4-pole miniature circuit breaker rated 63 A with a Trip Curve C characteristic, designed for DIN-rail mounting in distribution boards and sub-panels. The 63 A rating governs the continuous load it can carry without tripping; the C-curve (5–10× In magnetic trip) suits it for mixed resistive and moderate inductive loads where inrush is not severe — typical for general-purpose branch circuits in commercial and light industrial installations. Its interrupting rating of 10 kA at 277 V AC per the evidence means it can safely clear a fault up to that prospective short-circuit current without rupturing, which is the standard requirement for most secondary distribution panels in North American 480Y/277 V systems.
For BOM freeze and compliance documentation, the manufacturer provides RoHS and REACH declarations as standard for the System pro M compact series. The part carries CE marking for the European market; UL/CSA listing should be confirmed against the specific nameplate variant if required for North American installations.
Panel integration
The 4-pole width occupies four modular spaces (72 mm at 18 mm per pole). Verify busbar compatibility for 63 A feed-through; the S200 series accepts plug-in feeders and auxiliary contacts without additional wiring.