The Siemens SENTRON 3VA1180-3EF36-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated 80 A at 40 °C, built around a TM240 thermal-magnetic overcurrent release. That TM240 designation means the thermal trip element is fixed at 80 A, with magnetic pickup at 240 A — a combination sized for motor branch circuits or feeder protection where moderate inrush is expected. The interrupting capacity climbs to 75.6 kA at 240 V and still holds 52.5 kA at 415 V, so it clears high-fault bolted shorts without cascading upstream in most industrial panel configurations. Power dissipation at full load is 21.7 W maximum.
Thermal derating — the curve that governs real-world current
Above that, the thermal element begins to pull back: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C.
Interrupting capacity by system voltage — selectivity planning
The 3VA1180-3EF36-0BA0 delivers 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The steep drop above 440 V means the breaker is best applied in 240 V or 400 V class systems where its full interrupting muscle is available.