The ABB S802C-C20 is a 2-pole miniature circuit breaker from the S800C series, rated 20 A with Trip Curve C. The 15 kA interrupting rating at 230 V AC means it can safely clear a fault up to that level without upstream fuses needing to open — useful for high-fault-current installations where a standard 6 kA or 10 kA breaker would require a current-limiting fuse ahead of it. On the DC side, the 10 kA interrupting capacity at 250 V DC covers common battery-bank and UPS output protection scenarios.
The 2-pole footprint occupies two modular units (36 mm width).