The Siemens SENTRON 3VA2110-5MN32-0DC0 is a 3-pole molded case circuit breaker (MCCB) rated for motor protection duty, carrying a rated continuous current Iu of 100 A at 40 °C. The interrupting capacity at 240 V is 187 kA, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 17 kA at 690 V — these are the fault-clearing limits that define its placement in a distribution panel's selectivity study.
Ratings and what they mean for fit
The 100 A rating holds flat from 40 °C through 50 °C, then derates to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. If the panel ambient runs above 50 °C, the continuous load must be reduced per that curve — the 90 A floor at 70 °C is the worst-case limit for a warm enclosure. The ETU350M electronic overcurrent release provides adjustable thermal-magnetic protection tailored for motor starting inrush. Phase failure detection is built in, which prevents single-phasing damage on a three-phase motor load. An undervoltage release (UVR) is integrated as standard — the coil drops the breaker if control voltage falls below the dropout threshold, a common requirement for safety circuits that need to guarantee a trip on loss of control power. Two auxiliary switches (HQ type) are fitted for remote status indication. The latching endurance is rated at 20 000 cycles, which covers frequent switching applications like conveyor or pump motor isolation. Maximum power loss is 75 W — relevant for thermal calculations inside a sealed enclosure; that heat must be dissipated to stay within the derating curve above.
Physical integration
Dimensions are 86 mm deep, 105 mm wide, and 181 mm tall. The 105 mm width is the standard 3-pole MCCB footprint for this SENTRON frame size — it fits the same DIN-rail or panel-mount cutout as other 3VA2 breakers. Verify gland-plate clearance for the 86 mm depth, especially in shallow enclosures.