What this MCCB carries and where it fits
The Siemens 3VA1180-4EF32-0AD0 is a SENTRON molded case circuit breaker rated for 80 A continuous current (Iu) across the 40 °C to 50 °C band — no derating needed in a warm panel up to that point. Above 50 °C it steps down: 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C. That thermal curve matters if this breaker sits next to heat-generating gear like drives or transformers inside a common enclosure. Three-pole construction with a TM240 thermal-magnetic overcurrent release — fixed thermal trip, magnetic trip set at the factory. No undervoltage release, no shunt trip, no ground-fault monitoring, no auxiliary voltage trigger. It is a straight line-protection breaker: feed it, protect the cable, move on. The interrupting ratings climb to 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — numbers that tell you this breaker handles high available fault current on the secondary side of a distribution transformer without cascading upstream. The 70 mm depth and 76.2 mm width (standard 3-pole MCCB footprint) mean it drops into a SENTRON panel or any DIN-based distribution board sized for 3VA frames. Front IP40 — fine for a closed panel, not for washdown. Three auxiliary switches HQ come fitted, so you get status feedback without buying a separate accessory block.
What the TM240 release means on the bench
The TM240 designation is a thermal-magnetic release with a fixed thermal pickup at 80 A (the breaker's Iu) and a magnetic instantaneous trip set at 240 A — 3x the rated current. That is a standard motor-circuit protector curve: the thermal element handles overloads (sustained overcurrents that heat the conductor), and the magnetic element clears short circuits fast. The adjustable response time tr max. is 1 second — that is the maximum delay band for the thermal trip at a given multiple of Iu, not a user-set dial. No phase-failure detection, so if you need that function, spec a separate phase-monitor relay upstream.