The Siemens SENTRON 3VA2063-5JQ32-0AE0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, with a continuous current of 63 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Its interrupting capacity hits 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, so it handles high-fault utility feeds and transformer secondaries without cascading upstream. The breaker includes a communication function for remote monitoring or integration into a power-management system, and carries four HQ auxiliary switches plus ground-fault monitoring via summation current formation on the L-conductor.
Interrupting capacity and thermal performance
The 63 A frame is thermally flat from 40 °C to 70 °C — the breaker holds its full rating across that band, which is uncommon for a compact MCCB. Many competitors start derating above 50 °C; this one doesn't, so it suits warm enclosures or panels near heat sources. The interrupting curve drops sharply above 500 V: 75.6 kA at 500 V falls to 3 kA at 690 V. That 690 V figure is low enough that the breaker is effectively a 500 V device for high-fault applications; at 690 V it relies on upstream current limitation.
Panel fit and integration
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint for DIN-rail or panel-mount installation. The four HQ auxiliary switches occupy the accessory slot, and the ground-fault module sums the L-conductor currents, so no external CT or summation transformer is needed. Communication function is built in; no separate comm module required for basic remote status. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C.