Siemens 5SY4513-5 SENTRON MCB — 13 A, Char A, 2-Pole
It switches the neutral conductor, so it's suited for single-phase circuits where both line and neutral need overcurrent protection. Characteristic A trips between 2 and 3 times rated current, making it sensitive enough for semiconductor or control-transformer protection where standard B-curve breakers might not clear fast enough.
Ratings & Derating — What the Numbers Mean
The 13 A rating is at 35 °C ambient. At 40 °C it derates to 12.38 A, at 50 °C to 11.73 A, and at 60 °C to 11.02 A.
The 5SY4513-5 is certified to IEC / EN 60898-1 and IEC / EN 60947-2, and also carries UL1077 recognition.
