The Siemens SENTRON 3VA2463-6KP32-0CC0 is a 3-pole molded case circuit breaker rated for 630 A continuous at 40 °C, with a thermal derating curve down to 450 A at 70 °C. Its interrupting capacity hits 242 kA at 240 V and 187 kA at 415 V — numbers that put it in the high-fault tier for industrial main feeders or large sub-distribution. The breaker is designed for line protection (not motor or generator protection), carries an integrated communication function for remote monitoring or trip-event capture, and ships with an undervoltage release (UVR) and two HQ auxiliary switches pre-installed.
Key Ratings — What They Mean for Fit
The 630 A frame at 40 °C is the thermal benchmark for a main breaker on a 400–500 kVA transformer secondary or a large bus riser. If your panel ambient runs hotter — say, 50 °C inside the enclosure — the breaker derates to 570 A; at 60 °C it drops to 510 A. That derating curve is the first thing to check against your calculated load before committing the BOM line. Breaking capacity of 187 kA at 415 V means this breaker can safely interrupt a fault up to that level on a 400 V industrial network without cascading upstream. At 690 V the rating drops to 9 kA — verify the system voltage against the curve if you are on a 690 V corner-grounded delta or IT system. The 3-pole design, 248 mm height, 138 mm width, and 110 mm depth fit standard SENTRON panel-mounting footprints. The basic switch variant is 3VA2463-6KP32-0AA0; this -0CC0 suffix adds the communication module and UVR. If your panel was wired for a 5SQ2370-2YA05 frame, verify the mounting hole pattern and bus-bar spacing — the SENTRON 3VA series uses a different lug centerline than the older 5SQ generation.
Built-in Accessories and Communication
Two HQ auxiliary switches provide independent status feedback for PLC or SCADA inputs. The undervoltage release (UVR) trips the breaker on loss of control voltage — standard for safety disconnects or emergency-stop chains where a voltage-drop must open the main contacts. The communication function (protocol not specified in the base listing) enables remote tripping and energy monitoring without an external shunt trip. Maximum power loss is 164.5 W at rated current — account for this heat in your enclosure ventilation calculation, especially if the breaker is in a sealed cabinet with other heat sources.