What this MCCB carries
The Siemens SENTRON 3VA2010-5KQ32-0AA0 is a 3-pole molded case circuit breaker rated for 100 A continuous current at 40 °C through 70 °C — no derating needed across that span. Its interrupting capacity hits 187 kA at 240 V, dropping to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. That's a lot of fault-clearing headroom for a 100 A frame; you're covered for high-fault service-entrance or distribution applications where the available short-circuit current is serious. Rated insulation voltage is 800 V, and the breaker's design is line protection — meaning it's intended for feeder and main distribution duty, not motor branch-circuit protection with a separate overload relay. It includes a communication function and ground-fault monitoring via summation current formation on the L-conductor, so it can talk to a BMS or power monitoring system and report ground faults without an add-on module. The adjustable thermal-magnetic trip unit has an initial value of 20 A and a full-scale value of 100 A, so you can dial the continuous current setting down if the load doesn't need the full 100 A. No undervoltage release or voltage trip is fitted on this variant — if you need UVR, you're looking at a different suffix.
Physical fit and panel space
Dimensions are 181 mm high, 105 mm wide, 86 mm deep. That's a standard 3-pole MCCB footprint for a 100 A frame — it'll bolt into a SENTRON distribution panel or a generic enclosure with the same mounting centres. The 86 mm depth means it clears most 200 mm deep enclosures with room for wiring gutters. Power loss is 13.5 W maximum at rated current — negligible for thermal management in a ventilated panel, but worth noting if you're packing multiple breakers in a sealed stainless steel enclosure.
Environmental range
Operating temperature spans -25 °C to 70 °C; storage from -40 °C to 80 °C. That covers most indoor industrial environments and unheated warehouses. No derating curve needed for ambient up to 70 °C — the 100 A rating holds flat.