What this MCCB is and what it does
The Siemens 3VA2110-7MS32-0DC0 is a SENTRON molded case circuit breaker (MCCB) designed specifically for starter protection — meaning it is built to protect motor starters and their associated branch circuits, not just general distribution. It is a 3-pole unit rated for 100 A continuous current across the full ambient temperature range from 40 °C to 70 °C, so no derating curve is needed for elevated panel temperatures up to that ceiling. The adjustable thermal-magnetic trip unit covers 300 A to 1 500 A, which allows the breaker to be set to the motor full-load current rather than requiring a fixed-trip variant. Breaking capacity is 330 kA at 240 V AC, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V — the steep drop at 690 V reflects the physical limits of the arc-extinction chamber at that voltage, so verify the available fault current at the point of installation.
Integration and panel fit
Dimensions are 181 mm high, 105 mm wide, and 86 mm deep — a standard MCCB footprint that fits most 3-pole SENTRON panel cutouts and busbar systems. The breaker ships with an undervoltage release (UVR) and two HQ auxiliary switches pre-installed, so no separate accessory ordering is needed for basic status feedback or undervoltage tripping. The design is a starter-protection variant, meaning the internal trip characteristics are matched to motor-starting inrush rather than general cable protection. This matters when replacing a general-purpose MCCB in a motor circuit — the 3VA2110-7MS32-0DC0 will ride through the start transient without nuisance tripping.
Lifecycle and sourcing posture
For a BOM that requires a 3-pole MCCB with adjustable trip in the 300–1500 A range and an undervoltage release, this is a direct-fit line item. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.