Siemens 3VA2063-5HN32-0HA0 — 63 A MCCB for Line Protection
The Siemens 3VA2063-5HN32-0HA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current, 3-pole, designed for line protection in distribution panels. Its 187 kA breaking capacity at 240 V and 121 kA at 415 V means it can safely interrupt very high fault currents without upstream cascading — critical for high-available-fault-current installations like substations or large motor control centers. The 63 A rating holds flat from 40 °C to 70 °C, so no derating is needed across typical panel ambient temperatures.
Breaking Capacity and Selectivity
The interrupting ratings drop with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. For a 480 V panel (common in North America), the 75.6 kA SCCR gives headroom for most industrial service entrances. The 800 V rated insulation voltage supports use in 690 V systems where the available fault current is low. The shunt trip release (STL) allows remote tripping via a control signal — useful for emergency-stop circuits or supervisory shutdown.