Rated for 80 A continuous — TM240 release handles the thermal curve
The Siemens 3VA1180-3EF36-0DA0 is a SENTRON molded case circuit breaker rated for 80 A continuous current at 40 °C, holding that rating flat through 50 °C before a gentle derate begins. The TM240 thermal-magnetic release means the thermal trip element is calibrated for the full-load amp rating, so the breaker carries its nameplate current without nuisance tripping in a warm enclosure. At 55 °C it still handles 76.8 A; at 70 °C it's good for 72 A — useful if the panel runs hot or shares space with drives. Breaking capacity is rated across four voltage levels: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. That covers most industrial distribution panels up to 690 V line-to-line. The 52.5 kA at 415 V is the figure to check for 400 V class systems — it tells you the breaker can interrupt a bolted fault at that level without welding contacts or venting plasma into the enclosure. This is the line protection version — it's built to protect feeders and branch circuits, not motor overloads. If you need motor protection, you'd pair it with a separate overload relay. The 3-pole form factor fits standard MCCB mounting; the 70 mm depth, 76.2 mm width, and 130 mm height keep the footprint compact for multi-breaker panels.
Undervoltage release included — no auxiliary contacts
The 3VA1180-3EF36-0DA0 ships with an undervoltage release (UVR) as the auxiliary release design, part of the integrated auxiliary trip assembly (order code 3VA9608-0BB25). That means the breaker trips automatically if the control voltage drops below the release threshold — standard for machinery safety circuits where a loss of control power must open the main disconnect. There is no separate auxiliary contact block; if you need status feedback for a PLC, you'll add one externally. Front protection is IP40, so the breaker face is protected against tools and wires larger than 1 mm — fine for a closed panel. Storage range spans -40 °C to 80 °C; operating range is -25 °C to 70 °C. The rated insulation voltage is 800 V, giving headroom for 690 V systems.