What this MCCB is and what it does
The Siemens 3VA2110-7MN32-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed specifically for motor protection. It is a 3-pole unit rated for 100 A continuous current at ambient temperatures up to 70 °C without derating — a solid thermal budget for a motor branch circuit in a warm enclosure. The adjustable trip class (Tc CLASS 10A, 10E, 20E) lets you match the breaker's thermal memory to the motor's starting profile — Class 10 for fast-starting loads like pumps, Class 20 for high-inertia fans or conveyors. Phase failure detection is built in, so a lost phase on the line side trips the breaker instead of letting the motor single-phase to failure.
Interrupting capacity — where it fits
This breaker carries a very high interrupting capacity: 330 kA at 240 V AC, 242 kA at 415/440 V, and 187 kA at 500 V. At 690 V it drops to 3.7 kA — still adequate for most motor branch circuits at that voltage but worth noting if your system fault current is high. The high 240 V rating makes it a strong candidate for 277/480 V panelboards where the upstream transformer can deliver serious fault current.
Mounting and integration
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint for DIN-rail or panel-mount installation. The 86 mm depth (3.39 in) leaves room in a 200 mm deep enclosure for wiring and accessories behind the breaker. Rated insulation voltage is 800 V, so it's comfortable in 690 V systems.
Lifecycle and sourcing
The lifecycle stage is listed as current — meaning this is an active, in-production catalog item from Siemens. No end-of-life notice or last-time-buy window is on record. For a BOM line that needs a 100 A motor-protection MCCB with adjustable trip class, this part is a standard, specifiable choice. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.