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. It ships with the basic switch 3VA21105MN320AA0 as the switching mechanism. If you need remote trip or ground-fault, you add external modules.
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.