What this MCCB carries and where it fits
The Siemens SENTRON 3VA2110-5JQ32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for line-protection duty, meaning it sits at the feeder or branch in a distribution panel and clears overcurrents before they damage downstream wiring or loads. It carries a continuous current rating of 100 A flat from 40 °C through 70 °C — no derating needed across the normal panel ambient range, which simplifies the thermal budget in a crowded enclosure. The adjustable thermal-magnetic trip is set to a full-scale value of 100 A with an initial minimum of 20 A, giving the commissioning engineer room to dial in the actual load without swapping the breaker body. Breaking capacity is the headline number for a MCCB: this unit delivers 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. Those figures mean it can safely interrupt a fault current up to 187,000 A at 240 V without the arc flashing over or the breaker self-destructing — critical for high-fault installations like transformer secondaries or large motor control centers where available fault current can exceed 100 kA. The steep drop to 3.7 kA at 690 V tells you this is a 240–500 V breaker; at 690 V it still clears but the fault-current window narrows significantly.
Integration and panel fit
The breaker occupies 105 mm width, 181 mm height, and 86 mm depth — a standard MCCB footprint that drops into most Siemens SENTRON distribution boards and third-party enclosures with matching cutouts. The 3-pole body with line-protection design (no undervoltage release fitted) means it installs as a straight feeder breaker; the integrated communication function allows remote monitoring or trip-status readback, which a facility engineer can wire into a BMS or SCADA loop without an add-on module. Power loss is rated at 10 W maximum — low enough that a standard IP2X enclosure with natural convection handles the heat without forced cooling, but worth verifying in a sealed, high-ambient cabinet if multiple breakers are ganged. Operating temperature spans -25 °C to 70 °C; storage range is -40 °C to 80 °C, so the breaker can sit in an unheated warehouse or truck without damage.