70 kA class H breaker for motor branch circuits
The Siemens 3VA1110-6MH36-0AG0 is a 3-pole IEC frame 160 circuit breaker rated for 70 kA breaking capacity at 415 V (class H). That Icu figure means it can safely interrupt a fault current up to 70 kA without welding contacts or rupturing the case — critical for high-fault panels where upstream transformers or large drives can dump that kind of energy. It's configured as a starter protection device (TM120M) with a fixed thermal-magnetic release set at 100 A, but note: the thermal overload function is absent here — this unit provides short-circuit protection only, with an instantaneous trip adjustable from 5 to 15 times In (500–1500 A). If you need motor overload protection, pair it with a separate overload relay. The clamp connection terminals accept copper conductors without lugging, which speeds panel wiring. It carries one auxiliary switch (HP) and one trip alarm switch (HP) for remote status feedback — useful for PLC or SCADA monitoring of the breaker position and fault indication.
Where it fits in the panel
Mounts on a DIN rail or can be screw-fixed to a backplate — the 3VA1 series uses the same footprint as the older 3VT and 3VL frames, so panel cutouts and busbar arrangements carry over. The clamp terminals accept up to 50 mm² cable, and the auxiliary switches snap into the accessory slot without extra wiring space.