What this MCCB carries
The Siemens SENTRON 3VA1180-4EF36-0JH0 is a 3-pole molded case circuit breaker rated 80 A at 40 °C, sized for line protection in distribution panels. Its interrupting rating hits 121 kA at 240 V, stepping down to 75.6 kA at 415 V and 52.5 kA at 440 V — numbers that tell you it handles high-fault utility feeds without cascading upstream. The 800 V rated insulation voltage means it's comfortable on 480 V or 600 V class systems where the available fault current is substantial.
Thermal curve and auxiliary layout
The 80 A rating holds steady up to 50 °C, then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C (–). That's a shallow slope — you don't lose much headroom in a warm enclosure. The auxiliary switch block comes factory-configured with 2 auxiliary switches plus 1 trip alarm switch (HQ), and a shunt trip (STL) is built in. No undervoltage release or ground-fault monitoring on this variant. The trip indicator and voltage trigger are present.
Panel fit and dimensions
The 3VA1180-4EF36-0JH0 measures 130 mm high, 76.2 mm wide, and 70 mm deep (–). That 70 mm depth is a standard MCCB footprint for this class — it drops into SENTRON mounting bases and busbar systems without extra adapters. The 3-pole form factor matches the usual distribution panel layout; the auxiliary wiring exits the top or bottom depending on orientation.