The Siemens 3VA2463-5HN32-0CH0 is a SENTRON molded case circuit breaker (MCCB) rated for 630 A continuous at 40 °C, with a maximum breaking capacity of 187 kA at 240 V AC. This 3-pole unit is designed for line protection in distribution panels, switchboards, and industrial power systems where high fault-current interruption is required.
Ratings and what they mean for fit
The 630 A continuous rating at 40 °C is the baseline — at elevated ambient temperatures the breaker derates linearly: 612 A at 45 °C, 593 A at 50 °C, down to 520 A at 70 °C. For a panel running at 50 °C ambient, the usable current drops to 593 A, so size the load accordingly. The 187 kA breaking capacity at 240 V means this breaker safely interrupts faults up to that level without cascading upstream — critical for high-fault installations like transformer secondaries or large motor control centers. At 415 V the capacity is 121 kA, at 500 V it's 75.6 kA, and at 690 V it drops to 9 kA, so verify the system voltage against the curve.
Built-in accessories and integration
This MCCB comes factory-fitted with an undervoltage release (UVR) and a set of auxiliary switches: two auxiliary switches plus one trip alarm switch (HQ configuration). The UVR trips the breaker when control voltage drops, useful for emergency-stop circuits or undervoltage protection on motor feeders. The auxiliary switches provide status feedback to a PLC or SCADA system — NO/NC contacts for open/closed and tripped states. No communication module is included, so remote monitoring relies on hardwired I/O.
Deployment context
This breaker mounts in a standard panel or enclosure on a mounting plate — no DIN-rail clip, so plan for bolt-down installation. The 110 mm depth, 138 mm width, and 248 mm height fit typical MCCB cutouts; verify panel door clearance for the handle and auxiliary wiring.