400 A, 440 kA — what it means on the line
The 3VA2440-8HK32-0AA0: This 3-pole SENTRON 3VA2 MCCB carries 400 A continuous at 40–70 °C with no derating — same output across the full ambient range. Breaking capacity hits 440 kA at 240 VAC, 330 kA at 415 V, and still delivers 220 kA at 500 V; at 690 V it holds 52.5 kA. That means it clears high-fault scenarios in industrial distribution without cascading upstream — line protection design for heavy plant feeds.
ETU340 trip unit — what it controls
The ETU340 electronic overcurrent release gives you adjustable long-time, short-time, and instantaneous pickup plus ground-fault protection — though this variant ships without ground-fault monitoring. No undervoltage release, no communication module, no voltage-trigger accessory. It's a straight line-protection MCCB: trip indicator absent, no auxiliary contacts on the base unit. Power loss at full load is 63.5 W — plan ventilation accordingly.
Panel fit — dimensions and mounting
Footprint: 138 mm wide, 248 mm tall, 110 mm deep. Bolts into a standard MCCB panel cutout — no DIN-rail mount, this is a fixed breaker. Verify the bus-bar spacing and lug kit compatibility when replacing a previous frame.