What ships in the carton — and what this MCCB delivers
The Siemens 3VA2110-5KQ46-0AA0 is a SENTRON molded case circuit breaker rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Four poles, line-protection design, with an integrated ground-fault monitoring function that uses summation current formation on the L + N conductor. Breaking capacity reaches 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. The unit includes a communication function for integration into higher-level monitoring systems.
Panel fit and mounting
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — a 4-pole MCCB that fits standard distribution panel cutouts. The 86 mm depth keeps it clear of shallow gland plates and backpanel wiring troughs. Rated insulation voltage is 800 V, so it's comfortable on 690 V line-to-line systems common in industrial mains distribution.
What the ratings mean for the buyer's decision
The 100 A continuous rating is flat from 40 °C to 70 °C ambient — no thermal derating curve to track, which simplifies panel sizing in warm enclosures. The 187 kA breaking capacity at 240 V means it can interrupt very high fault currents on the secondary side of a distribution transformer without cascading upstream. Ground-fault monitoring via summation current formation on L+N detects leakage without a separate core-balance CT — saves a DIN-rail slot and wiring. The communication function allows the breaker to report status and trip events to a PLC or BMS over the plant network.