400 A MCCB with ETU560 — line protection for high-fault panels
The 400 A rating holds at 40 °C, 45 °C, and 50 °C; above that it derates to 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C, so if your panel ambient runs hot, factor the thermal curve into your BOM margin. Short-circuit breaking capacity is the headline number for this frame: 187 kA at 240 V, 121 kA at both 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. That SCCR profile means it handles high-fault utility feeds at low voltage and still clears a 690 V motor-circuit fault without cascading upstream.
Trip unit, auxiliaries, and communication
The ETU560 electronic trip unit supports communication — it can talk to the higher-level control system via the SENTRON communication bus, so you get remote trip indication, current metering, and parameter adjustment without opening the panel door. A shunt trip release (STL) is integrated for remote emergency-off or undervoltage-initiated tripping. Ground-fault monitoring uses summation current formation on L + N, so it detects leakage without a separate toroid. Mechanical endurance is 15,000 operations — not a daily-switch duty class, but fine for a distribution feeder that cycles once or twice a month.
Dimensions: 184 mm wide, 248 mm high, 110 mm deep.