B-curve trip characteristic and breaking capacity
The Siemens 5SY5204-6 is a 2-pole miniature circuit breaker from the SENTRON series, with a B-curve tripping characteristic that trips between 3 and 5 times rated current — suited for resistive and general-purpose loads where inrush is low, such as lighting, control transformers, and small motor circuits. Its breaking capacity is 10 kA per EN 60898 and 15 kA per IEC 60947-2 at DC, giving it headroom for fault currents typical in industrial panel distribution.
AC/DC voltage rating and dual-standard certification
Rated for both AC and DC operation — 400 V AC (multi-phase) and 440 V DC — with a maximum DC operating voltage of 500 V. It carries dual certification to IEC/EN 60898-2 and UL1077, so it qualifies for both IEC-based distribution panels and UL-recognized branch-circuit protection in the same footprint.
Depth is 76 mm (70 mm installation depth).