The Siemens SENTRON 3VA1180-6EF32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for line-protection duty, carrying 80 A continuously at 40 °C and fitted with a TM240 thermal-magnetic overcurrent release. Its interrupting capacity reaches 220 kA at 240 VAC, 154 kA at 415 VAC, and 121 kA at 440 VAC — figures that cover most industrial service-entrance and feeder applications where high fault current is expected. The breaker includes an undervoltage release (UVR) as the auxiliary release, so it drops the load if control power falls below the dropout threshold. No ground-fault monitoring, no communication module, and no trip indicator are fitted on this variant; it is a straightforward thermal-magnetic MCCB for standard distribution.
Breaking capacity and selectivity
The 220 kA at 240 VAC is the headline figure, but the more relevant number for a 400 V-class panel is the 154 kA at 415 VAC — that is the SCCR the breaker can interrupt without upstream cascading. At 500 VAC the capacity drops to 17 kA, and at 690 VAC it stays at 17 kA, so the breaker is best applied on 240 V to 480 V systems where fault currents are high. The 800 V rated insulation voltage (Ui) gives headroom for the 690 VAC rating, but the 17 kA limit at that voltage means it is not a primary choice for 690 V high-fault installations. For selectivity coordination, the TM240 release curve is fixed thermal-magnetic; no electronic adjustment or zone-selective interlocking is available on this variant.
Thermal derating and panel fit
The 80 A rating holds flat from 40 °C to 50 °C, then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. In a sealed, uncooled enclosure at 55 °C ambient, you lose 2 A from the nameplate — negligible for most loads, but worth factoring if the breaker is fully loaded. The 76.2 mm width (3 in) and 70 mm depth (2.76 in) are standard for the SENTRON 3VA frame; it mounts on a DIN rail or can be screw-fixed to a backplate. Maximum power dissipation is 21.7 W, so adjacent devices need reasonable air gap or the enclosure must move that heat. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C.