The Siemens SENTRON 3VA2110-7MS32-0JL0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed in a warm panel. Its adjustable thermal-magnetic trip covers 300 A to 1 500 A, so you set the pickup to match the load rather than swapping hardware. The interrupting ratings climb to 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V; that kind of SCCR headroom means it can sit upstream of smaller branch breakers without worrying about cascading failure during a fault.
Starter protection design — what that means for the panel
The built-in shunt trip (STL) allows a remote trip signal from a safety relay or PLC — handy for E-stop chains or emergency-off circuits.
The 3-pole block occupies roughly 4 inches of rail width; plan for the shunt trip wiring and auxiliary switch terminals on the left side when laying out the gland plate and wireway fill.
