What it is and what it does
The Siemens 3VA2440-6HL32-0AH0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in three-phase distribution panels. It carries a continuous current rating of 400 A with no derating from 40 °C through 70 °C — meaning it holds full ampacity even in a hot enclosure, a useful margin for tightly packed switchgear. Breaking capacity is the headline: 242 kA at 240 VAC, 187 kA at 415 VAC and 440 VAC, 121 kA at 500 VAC, and 9 kA at 690 VAC. Those numbers cover high-fault industrial services — the 242 kA at 240 V is typical for large transformer secondaries or busway feeds where available fault current is high. The breaker is 3-pole, rated for a minimum 600 A frame (the 3VA2 frame carries up to 4800 A maximum), so this is the 400 A trip unit in a frame that has headroom for selectivity coordination downstream.
Mounting and integration
Dimensions: 248 mm high, 138 mm wide, 110 mm deep. The auxiliary switch configuration is 2 auxiliary switches + 1 trip alarm switch HQ. That gives three separate signal contacts for status feedback to a PLC or remote indication — useful for a critical spare where you want to know the breaker tripped on fault, not just opened manually. No undervoltage release, no ground-fault monitoring, no communication function — this is a plain line-protection breaker. If remote trip or ground-fault protection is needed, you'd add an external module or specify a different variant.
Lifecycle and sourcing
Storage temperature range is -40 °C to 80 °C; operating range is -25 °C to 70 °C. That covers most indoor industrial environments, including unheated warehouses in cold climates.