What this MCCB is and what it does
The Siemens SENTRON 3VA2110-5MN36-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 100 A, designed specifically for motor protection. It includes an integrated undervoltage release and phase failure detection, making it suited for protecting three-phase motor circuits where loss of phase or voltage dip could damage the load.
Key ratings and what they mean for fit
The 100 A rating holds across the full ambient temperature range from 40 °C to 70 °C — no derating needed for elevated panel temperatures up to 70 °C. That simplifies panel design in warm enclosures or near other heat sources. Breaking capacity is 187 kA at 240 V AC and 121 kA at 415 V / 440 V, dropping to 75.6 kA at 500 V and 3.7 kA at 690 V. At typical 400 V industrial supply, the 121 kA rating provides high fault-current interruption — enough for most motor branch circuits without needing a current-limiting fuse upstream. Maximum power loss is 12.5 W, which is moderate for a 100 A frame and manageable in a standard IP54 enclosure with natural convection. Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a compact footprint for a 100 A MCCB, fitting standard distribution board cutouts.
Deployment context
As a motor-protection MCCB with undervoltage release and phase failure detection, it mounts in a panel or enclosure as the branch-circuit protective device for a three-phase motor — typically feeding a contactor or soft starter. The undervoltage release ensures the breaker trips if line voltage drops below a set threshold, preventing single-phasing damage.