Siemens 5SY5425-7CC — SENTRON 4-pole MCB, C-curve, 25 A
The IP20 protection class (with connected conductors) suits enclosed panel installation. Dimensions are 76 mm depth, 72 mm width, 90 mm height — 4 modular width units.
The 10 kA DC breaking capacity at 880 V (IEC 60947-2) is the headline rating for DC bus or battery-string protection. For AC applications, the UL 1077 / CSA C22.2 No.235 interrupting rating is 5 kA. Ambient temperature derates the continuous current: 25 A at 35 °C, 23.3 A at 40 °C, 22.4 A at 45 °C, 21.45 A at 50 °C, 20.47 A at 55 °C. The surrounding temperature influence curve (max 95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C) governs humidity limits.
The part is specified for mechanical engineering and industrial applications per its design designation.