What this MCCB is and what it does
The Siemens 3VM1180-4EE36-0AA2 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. Its TM220 thermal-magnetic release combines a thermal element for overload protection and a magnetic element for short-circuit protection, sized for a continuous current of 80 A at 40 °C. Rated 80 A at 40 °C through 50 °C, the breaker derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C — a thermal curve that matters when the breaker shares an enclosure with other heat sources. Interrupting capacity reaches 121 kA at 240 V AC, 76 kA at 415 V, 53 kA at 440 V, and 12 kA at 500 V — figures that govern the available fault current the installation can handle without upstream cascading.
Panel fit and mounting
Dimensions: 130 mm height, 76.2 mm width (3 in), 70 mm depth (2.76 in). The 3-pole body mounts into standard MCCB panel cutouts or on a mounting plate; IP40 on the front face means the breaker is protected against tools and small wires entering the enclosure, but not against water ingress. Maximum power dissipation is 19 W at rated load — a figure to account for in enclosure thermal calculations, especially when multiple breakers are ganged.
Key ratings at a glance
Rated insulation voltage is 800 V. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The breaker has no undervoltage release, no trip indicator, no voltage trigger, no communication function, and no ground-fault monitoring — it is a straight thermal-magnetic line-protection device.