What this MCCB carries and where it fits
The Siemens 3VA1180-5EF32-0HA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 80 A at 40 °C, with full thermal-magnetic trip via the TM240 release. The 187 kA interrupting capacity at 240 V AC means it handles high-fault scenarios common in industrial mains without cascading upstream — a key spec for selectivity studies. The 3-pole construction and shunt trip (STL) auxiliary release make it suited for remote emergency-off circuits in control panels.
Breaking capacity across voltages
Interrupting rating drops as voltage climbs: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. This is the SCCR the breaker can clear at the line side — coordination studies should use the voltage-specific value, not the highest number.
Thermal derating and ambient limits
Rated 80 A from 40 °C through 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. Operating ambient range is -25 °C to 70 °C; storage range -40 °C to 80 °C. If the panel ambient runs above 50 °C, the continuous load must be reduced per these figures — no headroom for guessing.
Physical fit and panel integration
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth. The 3-pole footprint matches the standard SENTRON 3VA mounting pattern — it drops into the same panel cutout and bus-bar arrangement as other 3VA frame sizes. No rewiring of the bus stack needed if replacing a same-frame 3VA breaker.