Siemens SENTRON 3VA1110-6MH36-0BA0 — 100 A MCCB with Undervoltage Release
The Siemens 3VA1110-6MH36-0BA0 is a 3-pole molded case circuit breaker from the SENTRON series, designed specifically for starter protection. It carries a rated current of 100 A at 40 °C and is equipped with a TM120M thermal-magnetic overcurrent release. The breaker includes an undervoltage release (UVR) as standard, making it a direct fit for motor starter circuits where loss-of-voltage protection is required.
Breaking Capacity and Selectivity
Breaking capacity is the headline spec here: 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V. At 500 V and 690 V it holds at 7.5 kA. That 220 kA at 240 V is exceptional — it means this breaker can sit at the main distribution point in a high-fault industrial panel and still coordinate with downstream devices. The 154 kA at 415 V covers most European 400 V systems with headroom for transformer-fed installations.
Thermal Derating and Operating Range
Rated 100 A from 40 °C through 50 °C, then derates: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. The operating ambient range is -25 °C to +70 °C, storage from -40 °C to +80 °C. Rated insulation voltage is 800 V. Maximum power loss is 27.5 W. Panel builders should account for that heat dissipation in enclosure sizing, especially when grouping multiple breakers.
Dimensions and Panel Fit
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 70 mm depth is relatively shallow for a 100 A MCCB with this breaking capacity, which helps in tight enclosures. Width at 76.2 mm (3 inches) is standard for a 3-pole frame. No trip indicator or communication function on this variant — it's a straightforward thermal-magnetic breaker with undervoltage release.