Residual current circuit breaker, 4-pole Type A, 125 A, 300 mA, 400 V AC, short-time delayed
The Siemens 5SV3645-6KK01 is a 4-pole residual current operated circuit breaker (RCCB) from the RCCB product family, rated at 125 A with 300 mA sensitivity on a 400 V AC system. The short-time delayed characteristic (often labelled S-type or time-delayed) provides selectivity: it holds during short-duration earth faults, letting the downstream RCCB trip first, which keeps the rest of the panel live.
Integration and compliance notes
Packaged as a single piece (78 x 97 x 85 mm), the 5SV3645-6KK01 mounts on standard DIN rail in the distribution board. The 4-pole form factor fits three-phase + neutral circuits. Group code P310 and product group 5511 are the Siemens internal classification fields — useful for cross-referencing in your ERP or when filtering Siemens catalog data.