Its rated continuous current Iu of 100 A sets the thermal capacity for the breaker body; at 40 °C ambient it carries 100 A without derating, and the current stays at 100 A through 50 °C, then tapers to 90 A at 70 °C (–). The 100 A frame is sized for a motor full-load current in that range, with the 240 V breaking capacity of 330 kA and 415 V rating of 242 kA handling high available fault currents typical on industrial secondary substations.
Overcurrent release and auxiliary trip integration
The integrated auxiliary trip module carries order code 3VA9608-0BB11, and the basic switch assembly is 3VA2110-7MS32-0AA0. Two auxiliary switches (HQ type) signal the breaker status to a PLC or contactor coil circuit.
Mounting dimensions: 105 mm width, 181 mm height, 86 mm depth. The 105 mm width is the standard 4-module (4× 27 mm) SENTRON 3VA2 frame, which fits Siemens SENTRON panelboards and distribution boards with plug-in or fixed-mount bases. Depth of 86 mm leaves clearance for rear-connected busbars and wiring tunnels.