What this 3VA1 breaker carries
The Siemens 3VA1110-6MH36-0CC0 is a 3-pole IEC frame 160 circuit breaker with class H breaking capacity — 70 kA at 415 V AC — sized for motor starter protection in a panel. Rated In = 100 A with a TM120M thermal-magnetic trip unit set for starter duty (short-circuit protection adjustable Ii = 5…15 × In). No overload protection module fitted; this is a magnetic-only short-circuit protector paired with a separate overload relay upstream. Built-in undervoltage release (UVR) rated 120–127 V AC, 50/60 Hz, and two HQ auxiliary switches for status feedback to a PLC or safety circuit. Clamp-type terminals for the power and control wiring — no ring lugs needed, which speeds up a panel build.
What the ratings mean on the line
The 70 kA Icu at 415 V AC means this breaker can safely interrupt a fault current up to that level without welding contacts or cascading failure upstream — critical for high-fault panels downstream of a large transformer. The class H designation (IEC 60947-2) is the highest standard breaking capacity in the 3VA1 frame, so it coordinates with most upstream MCCBs without needing a current-limiting fuse. Starter protection TM120M means the thermal element is sized for motor inrush (not general distribution) and the magnetic pickup range of 5–15× In lets you set it just above the locked-rotor current of the connected motor — typically 8× for a standard squirrel-cage. Pair this with a separate overload relay (e.g., Siemens 3RB or 3RU2) for full motor branch circuit protection. The UVR coil drops the breaker if control voltage falls below about 85% of rated 120–127 V AC — standard for emergency-stop or undervoltage protection schemes where a machine must not auto-restart after a power dip. Two HQ auxiliary switches give you one N/O and one N/C contact for status indication or permissive logic.
Panel integration notes
Mounts on a standard DIN rail or panel-mount via the 3VA1 frame's integral clips. Clamp terminals accept up to 70 mm² copper cable for the line and load sides. The UVR and auxiliary switches are factory-installed — no field add-on modules to order separately. Leave clearance above for the arc-chute exhaust; the 3VA1 vents upward.