80 A MCCB with 121 kA interrupting — panel fit and coordination
The Siemens SENTRON 3VA1080-4ED32-0AF0 is a 3-pole molded case circuit breaker rated for 80 A continuous current at 40 °C, with a TM210 thermal-magnetic release. Its interrupting capacity hits 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — numbers that govern selectivity and SCCR headroom in a distribution panel. The 70 mm depth and 76.2 mm width fit standard SENTRON 3VA mounting footprints, so it swaps into an existing 3VA panel bus without re-drilling the gland plate.
Thermal derating and release behavior
The TM210 release holds the full 80 A rating from 40 °C through 50 °C. Above that, it derates to 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 when the breaker sits in a crowded enclosure near other heat sources — the 80 A nameplate current is only valid up to 50 °C ambient.
Auxiliary contacts and enclosure protection
The breaker ships with one auxiliary switch and one trip alarm switch (HQ type), giving remote status indication without an add-on module. Front-face protection is IP40 — suitable for a clean indoor panel, not for washdown or outdoor exposure. The 800 V rated insulation voltage (Ui) supports 480 V and 600 V class systems with margin.