What it is and what it does
The Siemens SENTRON 3VA1180-3EF32-0DA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection — the primary feeder or branch-circuit disconnect in a distribution panel. It carries 80 A continuous current (Iu) at 40 °C ambient, with no derating needed up to 50 °C; above that, the current capacity tapers to 72 A at 70 °C. The TM240 thermal-magnetic release handles overload and short-circuit protection in one package, so no separate relay or CT is needed for standard feeder duty. Interrupting capacity is the headline spec for a buyer matching an existing SCCR study: 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. That 75.6 kA figure at 240 V means it can clear a bolted fault on a large step-down transformer secondary without upstream fuses — a common requirement in North American 240 V delta panels. At 415 V the 52.5 kA rating covers most European industrial distribution boards.
Panel fit and integration
Footprint is 76.2 mm wide, 130 mm tall, 70 mm deep — a standard 3-pole MCCB form factor that drops into most DIN-rail or panel-mount bases without re-drilling. The IP40 front protection means it's suited for enclosed distribution boards where the cabinet door provides the environmental seal; no gasket or cover is needed on the breaker face. An undervoltage release (UVR) is built in, designated as 3VA9608-0BB25. That allows a remote trip coil or safety circuit to drop the breaker when control voltage is lost — useful for emergency-stop chains or undervoltage protection on motor feeders. No auxiliary contacts or ground-fault module are included in this variant, so those would need to be added externally if the application requires them.