The Siemens 3VA2463-6KP32-0CA0 is a SENTRON molded case circuit breaker (MCCB) rated for 630 A continuous at 40 °C, with a three-pole design and an interrupting capacity of 242 kA at 240 V. It's built for line protection in industrial switchgear, and it carries an undervoltage release (UVR) as the auxiliary release. The part sits in the 3VA2 series, which is Siemens' current-generation MCCB platform.
What the ratings mean for fit
The 630 A continuous rating at 40 °C is the baseline — but this breaker has a full thermal derating curve all the way up to 70 °C, where it still carries 450 A. That matters if you're stuffing this into a hot panel or near a motor drive; you don't lose half your capacity at the top of the ambient range. The interrupting ratings across voltages tell you where it can go: 242 kA at 240 V is massive, enough for a main service entrance on a big low-voltage distribution board. At 415 V it still holds 187 kA, and at 690 V it drops to 9 kA — that's the system voltage limit; above 500 V the fault current capability falls off fast, so coordinate the upstream transformer impedance accordingly. The adjustable trip range spans from 945 A minimum to 5 670 A maximum. That's a 6:1 ratio, which gives you room to dial in the instantaneous pickup for motor inrush or transformer magnetizing current without nuisance tripping. The 164.5 W maximum power loss is the heat it dumps into the enclosure — factor that into your panel cooling if you're running it near the top of its rating.
Dimensions and panel fit
At 110 mm deep, 138 mm wide, and 248 mm tall, this is a standard-size 630 A MCCB frame. It's meant for bolted connection to a busbar or cable lug set in a switchboard — no DIN rail mounting on a breaker this size. The 138 mm width is the critical dimension for multi-breaker lineup spacing; verify your panel's busbar centers match before cutting gland plates.
Compliance and approvals
As a SENTRON product from Siemens, this breaker carries IEC 60947-2 and UL 489 certifications for molded case circuit breakers. The communication function supports integration into power monitoring systems via the 3VA communication module. No separate ground-fault monitoring version is included — that's an add-on accessory if you need GFCI functionality.