63 A MCCB with 187 kA interrupting capacity at 240 V
The Siemens 3VA1163-5ED32-0AH0 is a SENTRON 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release. Its interrupting capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V — figures that cover high-fault utility feeds and transformer secondaries without cascading upstream. The 800 V rated insulation voltage (Ui) gives headroom for 690 V line-to-line systems.
Thermal derating and panel integration
The breaker carries a full 63 A up to 50 °C ambient; above that it derates linearly to 56.7 A at 70 °C. Mounted on a DIN rail, the 76.2 mm width (4-module footprint) and 130 mm height fit standard distribution panels. The IP40 front protection suits enclosed switchgear — not washdown environments.