The Siemens 3VA1080-3ED42-0AC0 is a SENTRON molded case circuit breaker rated for line protection, carrying 80 A continuous current (Iu) across a 4-pole frame. The TM210 thermal-magnetic release handles overload and short-circuit protection without undervoltage or shunt trip accessories fitted — it ships as a straight line-protection device with no auxiliary releases installed.
Breaking capacity across voltage levels
Breaking capacity is rated at 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. At 415 V — the most common industrial distribution voltage in IEC territories — the 52.5 kA figure gives solid headroom for high-fault panels without cascading upstream. The 690 V rating (7.5 kA) confirms it can serve 690 V line-side applications, though the steep drop means the fault current available at that voltage must be verified against the installation's prospective short-circuit current.
Thermal derating and ambient limits
The breaker holds its full 80 A rating up to 50 °C ambient. Above that, derating is gradual: 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C. For a panel running warm — say 55 °C inside the enclosure — the effective continuous current is still 76.8 A, which keeps the 80 A frame usable for most 63–80 A feeder circuits without upsizing. Operating range is -25 °C to 70 °C; storage range -40 °C to 80 °C.
Panel fit and auxiliary contacts
Footprint is 101.6 mm wide by 130 mm tall by 70 mm deep — a 4-pole frame that fits standard SENTRON panel cutouts. The breaker ships with two auxiliary switches (HQ type) pre-installed, giving status feedback for the open/closed position without needing a separate accessory order. Front-face protection is IP40, meaning it's protected against tools and solid objects larger than 1 mm but not sealed against moisture — mount it inside a rated enclosure for washdown or outdoor duty.