The Siemens 3VA2463-6HN32-0JA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 630 A continuous current, built for line protection in industrial distribution panels. Its 242 kA interrupting capacity at 240 V AC means it can clear a bolted fault up to that level without the arc flashing upstream — critical for maintaining selectivity in a multi-level MCCB lineup. The ETU350 electronic trip unit handles the overcurrent response, adjustable for long-time, short-time, instantaneous, and ground-fault curves.
Breaking capacity across voltage levels
This MCCB's short-circuit rating drops as voltage rises: 242 kA at 240 V, 187 kA at both 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V. At 690 V the 40 kA figure still covers most industrial service-entrance faults, but if your plant runs a 690 V bus with available fault current above that, you need a higher-rated frame. The 800 V rated insulation voltage (Ui) confirms the internal clearances handle the higher potential without tracking.
Thermal derating and ambient limits
The 630 A rating holds at 40 °C ambient. Above that, current must be derated: 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. If the panel sits in a hot environment — near a furnace, in a non-climate-controlled enclosure — the 70 °C derating to 520 A is the real continuous limit. Operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Trip unit and release configuration
The ETU350 overcurrent release provides electronic protection with adjustable settings. The breaker includes a shunt trip (STL) release for remote tripping — useful for emergency-stop circuits or upstream disconnection. There is no undervoltage release, no auxiliary contacts, no communication function, no phase-failure detection, and no ground-fault monitoring on this variant. The supplied basic switch is 3VA2463-6HN32-0AA0; the integrated auxiliary trip is 3VA9688-0BL32. Maximum power loss is 162 W.
Physical fit and panel integration
Dimensions are 110 mm deep, 138 mm wide, 248 mm tall. The 3-pole frame mounts into a standard MCCB cutout in a distribution panel or switchboard. Verify the bus-bar spacing and mounting hole pattern against your existing panel layout — the 138 mm width is typical for a 630 A frame, but a retrofit into a smaller cutout may require a sub-panel adapter.