What this MCCB does for a panel
The Siemens SENTRON 3VA2063-6HL32-0DL0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It is designed for line protection, meaning it guards the feeder or distribution bus against overcurrent and short-circuit faults, not motor or generator protection. The unit includes an undervoltage release (UVR) that trips the breaker when supply voltage drops below a set threshold, a common requirement for safety disconnects in machine-tool and conveyor panels. A trip indicator gives visual confirmation of a fault trip without needing to open the door.
Breaking capacity — what the numbers mean for your fault level
This breaker carries a maximum breaking capacity of 756 A and a minimum of 95 A, but the real selection driver is the interrupting rating at system voltage. At 240 V it clears 242 kA — enough for high-fault service-entrance or large sub-distribution boards. At 415 V and 440 V the rating holds at 187 kA, dropping to 121 kA at 500 V. At 690 V the rating is 3 kA, which restricts this frame to low-fault 690 V applications or downstream positions with current-limiting upstream devices. The 86 mm depth, 105 mm width, and 181 mm height fit standard SENTRON panel cutouts; verify the mounting footprint against existing busbar spacing before committing the BOM line.