The Siemens SENTRON 3VA2463-6HL32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 630 A at 40 °C. The ETU320 electronic trip unit provides adjustable overload and short-circuit protection curves, with the interrupting capacity reaching 242 kA at 240 V and 187 kA at 415 V. The 162 W maximum power loss at full load factors into enclosure thermal design — the breaker dissipates that heat into the panel, so adjacent component spacing and ventilation matter.
Interrupting capacity across voltage
The interrupting ratings drop as system voltage rises: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V. For a 480 V delta or 400 V wye distribution panel, the 187 kA figure covers most high-fault installations. At 690 V the 40 kA rating still handles industrial motor-drive bus faults within typical transformer sizes.
Thermal derating and mounting
The 630 A rating holds at 40 °C ambient. Above that, derate per the curve: 612 A at 45 °C, 593 A at 50 °C, 575 A at 55 °C, 557 A at 60 °C, 538 A at 65 °C, and 520 A at 70 °C. In a sealed enclosure without forced airflow, the internal ambient can easily reach 50–55 °C, so the effective current capacity drops to 575–593 A. The dimensions — 248 mm height, 138 mm width, 110 mm depth — fit standard MCCB panel cutouts; the 110 mm depth leaves clearance behind the gland plate for the shunt trip wiring.
Integrated accessories
This variant includes a factory-integrated shunt trip (STL) release, order code 3VA9688-0BL33, for remote tripping via a control signal. Two auxiliary switches (HQ) provide status feedback to a PLC or annunciator panel. The undervoltage release is not fitted, and there is no ground-fault monitoring module. The trip indicator is absent, so fault-event logging relies on the auxiliary switch state or the ETU320's internal event counter accessible via the communication module slot.