The Siemens 5SL7304-8RC is a 3-pole miniature circuit breaker rated at 415 V with a 15 kA breaking capacity and a D 4 tripping characteristic. The D curve means it tolerates the high inrush currents typical of motor and transformer loads — expect magnetic trip between 10× and 20× rated current, so it avoids nuisance trips on inductive starts while still clearing a hard short.
Lifecycle and sourcing
For a BOM line or a panel spare, the 5SL7304-8RC is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
What the ratings mean for fit
The 15 kA breaking capacity at 415 V means this breaker can safely interrupt a fault current up to that level without welding its contacts or cascading damage upstream — sized for commercial and light industrial panelboards where the prospective short-circuit current stays under that threshold. The D 4 characteristic (10–20× In magnetic trip) is the deciding factor for motor branch circuits: a standard B or C curve would trip on the starting surge of a 4 A motor load; the D curve holds through the acceleration phase.