What this MCCB is and what it does
The Siemens 3VA2110-5MN32-0AC0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across its entire operating temperature range from -25 °C to 70 °C — no derating needed up to that ambient ceiling. It is specifically designed for motor protection, with integrated phase failure detection and adjustable short-time delay settings (minimum 4 s, maximum 17 s) that let you coordinate with downstream motor starters and upstream feeders. The interrupting capacity is 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — these numbers define the maximum fault current the breaker can safely clear at each voltage level, which is the primary spec for panel SCCR compliance. The 100 A frame is flat-rated across temperature, so you don't lose capacity in a warm enclosure.
Motor protection design — what that means for your line
This breaker is built for motor protection, not just cable protection. The phase failure detection catches a lost phase before the motor overheats. The adjustable time-delay settings (4 s to 17 s) allow you to ride through motor starting inrush without nuisance tripping, while still clearing a bolted fault fast. The auxiliary switch configuration (2 HQ auxiliary switches,) provides status feedback to a PLC or annunciator panel — essential for remote monitoring on a conveyor line or pump station. It ships with the basic switch 3VA21105MN320AA0 as the switching mechanism. There is no undervoltage release, no voltage trip, no ground-fault monitoring, and no communication function built in — this is a straightforward thermal-magnetic MCCB with motor protection curves, not a smart breaker. If you need remote trip or ground-fault, you add external modules.
Dimensions and panel fit
The breaker measures 181 mm high, 105 mm wide, and 86 mm deep (7.13 x 4.13 x 3.39 inches). That 105 mm width for a 3-pole 100 A frame is standard for SENTRON 3VA2 breakers — it will drop into the same mounting footprint as other 3VA2 100 A units. The depth of 86 mm includes the arc chamber and terminals; allow clearance for cable bending radius below the line and load lugs.