What this 3VA2 MCCB carries
The Siemens 3VA2340-6HN32-0JL0 is a SENTRON 3VA2 molded case circuit breaker rated for 400 A continuous at 40 °C ambient, with a 3-pole configuration and a maximum breaking capacity of 242 kA at 240 V AC. Breaking capacity drops to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V — so the voltage class you're protecting determines the fault-clearing headroom. Thermal derating starts at 55 °C: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C.
No undervoltage release is fitted, and no ground-fault monitoring version is included. If UVR or GF protection is required, this is not the variant.
Dimensions are 248 mm high, 138 mm wide, and 110 mm deep — a standard 3VA2 frame size that drops into the same mounting footprint as other 3VA2 3-pole units in the 400 A class. Maximum power loss is 96 W at rated load — account for that heat in the enclosure thermal calculation, especially in a sealed panel.