The Siemens SENTRON 3VA2440-6HL32-0DL0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 400 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel thermal budgeting in a warm enclosure. Its interrupting capacity hits 242 kA at 240 V, 187 kA at 415 V and 440 V, and 121 kA at 500 V — numbers that put it squarely in high-fault-duty territory for industrial switchboards and transformer secondaries where available fault current is substantial. At 690 V the interrupting rating drops to 9 kA, so if your circuit runs at that voltage, verify the upstream fault level stays within that envelope. Maximum power loss is 66 W — a figure to factor into enclosure ventilation if the MCCB is tightly grouped with other heat sources.
Dimensions are 248 mm high, 138 mm wide, and 110 mm deep — a standard SENTRON 3VA frame size that fits existing 3VA panel cutouts and busbar arrangements. The basic switch variant is listed as 3VA2440-6HL32-0AA0; the -0DL0 suffix adds the UVR and the HQ auxiliary switch configuration, so if you are replacing a bare switch, confirm the accessory stack matches your control voltage.
Selectivity and coordination considerations
The breaker carries a 5 kA rating limited to 1 second — a short-time withstand figure that matters for selective coordination downstream of a larger feeder: it lets a downstream device clear a fault before this breaker trips, provided the fault current and duration stay under that threshold. A trip indicator is fitted, so a maintenance technician can visually confirm the breaker has opened on fault without needing to reset and re-energize to check.