What it is and what it does
The Siemens SENTRON 3VA2063-5JQ32-0AG0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous at up to 70 °C ambient, with an adjustable overload trip setting spanning 95 A to 756 A — meaning a single frame covers motor and feeder protection across a wide current band without swapping the breaker body. Breaking capacity hits 187 kA at 240 V AC, 121 kA at 415 V AC, and 75.6 kA at 500 V AC — figures that put it in the high-interrupting class for industrial service entrances and large panelboard feeders where fault current runs high.
Fit and integration
The 105 mm wide, 181 mm tall, 86 mm deep body fits standard SENTRON 3VA mounting patterns — no special adapter needed for existing panel cutouts or busbar layouts. It ships with one auxiliary switch and one trip-alarm switch (HP type) factory-fitted, so you get remote status indication without buying add-on modules. A communication function is built in, supporting integration into higher-level monitoring or energy management systems without a separate gateway module.
Sourcing and lifecycle
The basic switch variant 3VA20635JQ320AA0 is the core breaker element; the -0AG0 suffix adds the auxiliary and alarm switches, so if your BOM already lists the base switch, confirm your auxiliary contact count before substituting.
What the ratings mean for your panel
The adjustable overload range (95–756 A) means one breaker covers everything from a small motor feeder to a main distribution tie — set the trip band with the front dial, no internal component swap. Rated current holds at 63 A from 40 °C through 70 °C ambient, so no derating curve to chase in a warm enclosure — that is unusual for an MCCB and simplifies panel thermal calculations. Maximum power loss is 5.4 W, low enough that adjacent breakers in a multi-unit panel stay within their thermal limits without forced cooling.