The Siemens SENTRON 3VA2340-5JQ42-0AE0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying 400 A continuous current at 40 °C through 50 °C without derating. At 55 °C the rating steps to 375 A, at 60 °C to 350 A, and at 70 °C to 300 A — the thermal curve is published, so panel ambient determines the real ampacity. Interrupting capacity runs 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. Those are the short-circuit ratings at the respective line voltages — the breaker clears faults up to those levels without upstream coordination failure. The ETU560 electronic trip unit handles the protection curve. Ground-fault monitoring uses summation-current formation on L+N conductors.
Dimensions: 248 mm height, 184 mm width, 110 mm depth. The 4-pole frame mounts in a standard MCCB panel footprint; the 110 mm depth leaves clearance for rear-access busbars and cable routing in most 600 mm deep enclosures.
Trip unit and auxiliary configuration
The ETU560 overcurrent release is programmable. No undervoltage release or voltage trigger is fitted on this variant. No trip indicator is present on this version.