What the ratings mean for fit
The 3VA1180-5EF42-0AA0 is a SENTRON molded case circuit breaker (MCCB) from Siemens, designed for line protection in distribution panels. Its 80 A rated current at 40 °C holds steady through 50 °C before derating to 74 A at 70 °C — the thermal curve matters if your panel runs hot. The TM240 overcurrent release is a fixed thermal-magnetic trip unit; no voltage trigger or ground-fault monitoring on this variant. Four poles suit three-phase plus neutral or switched-neutral configurations. Breaking capacity hits 187 kA at 240 V and 121 kA at 415 V — that's high-interrupting for a compact frame, meaning it can clear severe faults without upstream fuses in most low-voltage switchgear.
Mounting and integration
Front face carries IP40 protection — fine for a dry indoor panel, not for washdown. Dimensions: 130 mm high, 101.6 mm wide, 70 mm deep. The 70 mm depth is shallow enough for most 200 mm deep enclosures; check gland-plate clearance if you're back-mounting. No communication function — this is a straight electromechanical breaker, no Modbus or remote trip.
