The 5SY7406-7: Breaking capacity is 15 kA per EN 60898 and 40 kA per IEC 60947-2 — the IEC figure governs fault interruption in industrial control panels where the prospective short-circuit current can exceed the residential EN rating.
Derating and thermal limits
At 35 °C ambient the breaker holds its full 6 A rating. Above that, derate linearly: 5.71 A at 40 °C, 5.56 A at 45 °C, 5.41 A at 50 °C, 5.25 A at 55 °C, and 5.09 A at 60 °C. If the panel internal temperature runs hot — common in sealed enclosures — factor the 40 °C or 50 °C column into the load calculation, not the 35 °C figure. Operating temperature range spans -40 °C to +75 °C, with humidity limits of 95 % up to 55 °C, 55 % to 70 °C, and 35 % to 75 °C. The storage range exceeds the operating range — that governs handling, not running.
Occupies four standard 18 mm DIN slots — confirm the rail allocation before committing the BOM if the panel is already dense. Sealable, halogen-free, silicon-free construction.