What it is and what it does
The ABB 2CDS273001R0634 S203M-C63 is a three-pole miniature circuit breaker from the System Pro M Compact S200M family, rated 63 A with a C-trip curve, 440 V AC and 125 V DC, and a 10 kA breaking capacity. The C-curve means it holds through moderate inrush — think motor starts or capacitor banks — and trips fast on a short-circuit. At 10 kA it clears faults up to that level without welding contacts or cascading upstream.
Lifecycle and sourcing reality
No last-time-buy or phase-out notice is on record. The supply chain is stable for BOM freeze or line-down spare specification.