The Siemens 3VA1110-5MH36-0BA0 is a 3-pole IEC frame 160 circuit breaker from the 3VA1 series, rated at 100 A with a breaking capacity class M delivering Icu=55kA @ 415V. It is configured for starter protection with a TM120M thermal-magnetic release, set for short-circuit protection only (no overload protection) with an adjustable instantaneous trip Ii=5...15 x In. The unit includes a 24V DC undervoltage release (UVR) and clamp-type terminals for wiring.
Breaking capacity and coordination
The 55 kA Icu at 415 V places this breaker in the 'M' (medium) breaking capacity class within the 3VA1 frame 160 family. For a site electrical engineer, this means it can safely interrupt fault currents up to 55 kA without upstream cascading — sufficient for most industrial secondary distribution panels where the available fault current is below that threshold. The 100 A continuous rating and the TM120M trip unit are sized for motor starter protection, where the breaker provides short-circuit backup while the overload relay handles running protection.
Integration notes
The clamp-type terminals accept copper or aluminum conductors without lug kits, reducing installation time in the panel. The undervoltage release (UVR) at 24 V DC allows remote tripping from a safety circuit or PLC output — common in machine-tool and conveyor applications where a loss of control voltage must open the breaker. The 3-pole configuration fits standard DIN-rail or panel-mount footprints for the 3VA1 frame 160.