What this MCCB is and what it does
The Siemens 3VM1180-3ED32-0AA0 is a SENTRON molded case circuit breaker (MCCB) configured for line protection — the basic overcurrent and short-circuit protection role in a distribution panel or machine feeder. It carries 80 A continuously at 40 °C ambient, and the TM210 thermal-magnetic release handles the overload curve and instantaneous trip without external control wiring. Three poles, rated operational voltage 690 V AC, and a maximum power loss of 19 W at full load.
Breaking capacity — what the numbers mean for your fault level
This MCCB delivers 76 kA at 240 V AC, 53 kA at 415 V AC, 32 kA at 440 V AC, and 12 kA at 500 V AC. Those are the interrupting ratings at each voltage — the maximum fault current the breaker can safely clear at that voltage level. For a 415 V panel with a prospective short-circuit current of, say, 40 kA, this breaker has headroom. At 500 V the rating drops to 12 kA, so confirm your system's available fault current at that voltage before specifying.
Thermal derating — it's not 80 A everywhere
The 80 A rating holds from 40 °C through 50 °C ambient. At 55 °C it derates to 78 A, at 60 °C to 77 A, at 65 °C to 75 A, and at 70 °C to 74 A. If this breaker sits in a crowded enclosure with poor airflow, the effective continuous current is lower than the label. Plan your load at the actual cabinet ambient, not the 40 °C number.
Panel fit and environment
Dimensions: 130 mm high, 76.2 mm wide, 70 mm deep. That 3-inch width per pole is standard for this class of MCCB — it fits the typical DIN-rail or panel-mount footprint without surprises. IP40 on the front means it's protected against solid objects over 1 mm but not against water ingress; keep it inside a sealed enclosure in washdown areas. Operating range is -25 °C to 70 °C ambient, storage from -40 °C to 80 °C.