What this MCCB is and what it does
The Siemens SENTRON 3VA2110-7MS32-0CA0 is a 3-pole molded case circuit breaker (MCCB) designed for starter protection — meaning it's built to protect motor starters and their branch circuits, not just general distribution. It carries a continuous current rating of 100 A across the full ambient temperature range from 40 °C through 70 °C, so no derating is needed in a warm panel (–). The adjustable thermal-magnetic trip can be set between 300 A and 1500 A, giving you a wide band to coordinate with the motor's locked-rotor current and the upstream feeder.
Breaking capacity — the real-world so-what
The interrupting ratings are what separate this MCCB from a standard feeder breaker. At 240 V it clears 330 kA; at 415 V and 440 V it holds 242 kA; at 500 V it drops to 187 kA. The 690 V figure of 3.7 kA tells you this is not the breaker for a 690 V motor branch unless the available fault current is very low. For a typical 400 V motor control center with an upstream transformer, 242 kA SCCR means it can be applied downstream of a high-capacity main without needing a current-limiting fuse ahead of it — that saves panel space and a set of fuse holders.
Built-in undervoltage release
This variant ships with an undervoltage release (UVR) as the auxiliary release. The UVR trips the breaker when the control voltage drops below a set threshold — standard for safety circuits that need to drop a motor starter on loss of control power. The trip indicator is not fitted, so you won't get a local mechanical flag showing whether the breaker tripped on overload, short, or UVR; plan for a remote indication if the application requires it.
Lifecycle and sourcing posture
The lifecycle stage is marked as current, meaning Siemens still lists it as an active catalog number — no phase-out notice, no last-time-buy window. That matches the SENTRON 3VA series being the current-generation MCCB platform. The part is sourced to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
Dimensions and panel fit
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep. It mounts directly to a back panel or DIN rail via integral mounting lugs. The depth of 86 mm (3.39 in) fits in most enclosures with room for wiring behind it.
Power loss and thermal management
Maximum power dissipation is 12.5 W at rated current. In a sealed enclosure with multiple breakers side by side, that heat adds up — allow for natural convection or a ventilation grille if the ambient inside the panel approaches the 70 °C operating maximum. Storage range goes from -40 °C to 80 °C, which covers most warehouse and transport conditions.