Line protection MCCB with shunt trip and auxiliary switches
The Siemens SENTRON 3VA2463-6HN32-0HC0 is a 3-pole molded case circuit breaker (MCCB) rated for 630 A continuous current at 40 °C, designed for line protection in distribution panels and industrial switchboards. Its interrupting capacity reaches 242 kA at 240 V AC, 187 kA at 415/440 V, 121 kA at 500 V, and 9 kA at 690 V — covering high-fault scenarios typical in large commercial and industrial installations. The breaker ships with a factory-installed shunt trip (STL) and two HQ auxiliary switches, allowing remote tripping and status feedback without additional wiring modifications.
Thermal derating and panel integration
Continuous current derates from 630 A at 40 °C to 520 A at 70 °C ambient — a consideration when the breaker sits in a warm enclosure or alongside other heat-generating devices. Dimensions of 248 mm height, 138 mm width, and 110 mm depth fit standard MCCB mounting footprints in switchgear; the 3-pole form factor matches common panel cutouts. Maximum power loss is 162 W — plan for ventilation or derating if multiple breakers are ganged in a sealed enclosure.
Sourcing and lifecycle
The basic switch variant is 3VA2463-6HN32-0AA0; the -0HC0 suffix adds the shunt trip and auxiliary switches as a factory-assembled option.