The Siemens 3VA1220-6MH32-0AH0 is a SENTRON molded case circuit breaker (MCCB) rated for 200 A continuous at 40 °C, with a 3-pole configuration and a TM120M thermal-magnetic overcurrent release. It is designed for starter protection — meaning it handles both motor overload and short-circuit interruption in a single device, which simplifies panel wiring and reduces component count on motor branch circuits.
Breaking capacity by system voltage
This breaker delivers 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 4.5 kA at 690 V. The steep drop above 500 V means it is not a universal high-voltage MCCB — at 690 V the 4.5 kA rating limits it to low-fault-current applications. For 400 V class panels (common in European industrial mains), the 154 kA figure gives substantial SCCR headroom against most transformer-fed faults.