What it is and what it does
The Siemens SENTRON 3VA1080-3ED42-0HH0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 80 A at 40 °C through 50 °C, and derating to 72 A at 70 °C. The TM210 thermal-magnetic release handles overload and short-circuit protection without electronics, so there's no communication module or phase-failure detection onboard — just a shunt trip (STL) for remote tripping and a set of 2 auxiliary switches plus a trip alarm switch for status feedback.
Breaking capacity — what the numbers mean for your panel
At 240 V this breaker interrupts 75.6 kA, at 415 V it handles 52.5 kA, at 440 V it drops to 32 kA, and at 690 V it's 7.5 kA. That 75.6 kA at 240 V means it can safely clear a fault on a high-capacity transformer secondary without the arc re-striking — critical for selectivity coordination downstream. The 690 V figure is low enough that you'd want to verify SCCR headroom if you're feeding a 690 V drive bus; the breaker is rated for 800 V insulation, so the gap is in the interrupt rating, not the dielectric.
Mounting and integration
The 3VA1080-3ED42-0HH0 measures 130 mm high, 101.6 mm wide, and 70 mm deep — it fits standard panel-mount cutouts for 4-pole MCCBs in the 80 A frame. The front face carries IP40 protection, so it's fine for a clean indoor panel but not washdown zones. The shunt trip (STL) and auxiliary contacts are wired via the integrated terminal block; the trip alarm switch (HQ) gives a separate signal for remote annunciation.