What this MCCB is and where it fits
The Siemens 3VA1180-4EE32-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 80 A continuous current, built for line protection in distribution panels and motor control centers. The 3-pole design with a TM220 thermal-magnetic release means it handles overloads via a bimetal element and short circuits via a magnetic trip — no electronic adjustment, no communication module, just a straightforward overcurrent trip curve for fixed-load feeders or main incomers. Breaking capacity is the headline number that decides whether this breaker clears a fault without welding its contacts or venting arc gas into the panel. At 240 V it interrupts 121 kA; at 415 V that drops to 75.6 kA, then 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA figure at 240 V is high enough for most transformer-secondaries and large service-entrance applications — you are not chasing a coordination study with a marginal SCCR. The 80 A rating holds flat 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. If the panel ambient runs above 50 °C, the continuous load must be trimmed accordingly — a common oversight when stuffing MCCBs into a hot enclosure with drives or transformers.
Panel fit and thermal budget
Physical footprint: 130 mm tall, 76.2 mm wide, 70 mm deep. That 76.2 mm width is a standard 3-pole MCCB form factor — it drops into a DIN-rail or panel-mount base without needing a custom adapter plate. Depth of 70 mm leaves room behind the panel door for wiring gutters or a second row of breakers. Maximum power loss is 19.2 W at rated current. For a sealed enclosure, that heat must be factored into the thermal rise calculation — at 80 A continuous, the breaker itself dissipates nearly 20 W, which adds to the internal temperature and can accelerate the derating curve if ventilation is poor. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limits are wider because the breaker is not carrying current or dissipating heat — handling and shelf life, not running performance.
Lifecycle and sourcing reality
Insulation voltage is rated 800 V, which covers 480 V and 600 V class systems with margin. No undervoltage release, no ground-fault monitoring, no communication function — this is a bare-bones line-protection MCCB. If the application needs shunt trip, UVR, or remote status, a different variant in the 3VA family is required.