Siemens 5SY4620-7CC — 20 A C-Curve MCB, 4-Pole, 10 kA
The Siemens 5SY4620-7CC is a SENTRON miniature circuit breaker with a 20 A rated current at 35 °C, C tripping characteristic, and 4 poles (3P+N) for 440 V AC multi-phase operation at 50/60 Hz. Rated current derates with ambient temperature: 20 A at 35 °C, 18.8 A at 40 °C, 18.18 A at 45 °C, 17.52 A at 50 °C, and 16.84 A at 55 °C. If the panel runs warm, size up accordingly — the 20 A marking is only valid at 35 °C.
Sealable design allows lockout/tagout. Halogen-free and silicon-free construction avoids corrosive off-gassing in enclosed cabinets.