What this MCCB carries and where it fits
The Siemens SENTRON 3VA1180-3EF36-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for 80 A continuous current, designed for line protection in distribution panels and motor control centers. It belongs to the SENTRON 3VA series, which covers the compact-to-high-performance range of Siemens MCCBs for commercial and industrial power distribution. Breaking capacity varies with system voltage: 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The rated insulation voltage is 800 V, giving headroom for 480/277 V and 600 V class systems. Maximum power loss at rated current is 19.2 W, which factors into enclosure thermal management. Thermal derating is minimal up to 50 °C (full 80 A), then drops to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. This means the breaker holds its rating through most normal panel ambient conditions; only above 50 °C do you need to account for the reduction. This variant ships with a shunt trip (STL) for remote tripping and two HQ auxiliary switches for status feedback to a PLC or annunciator panel. The auxiliary release design is specified as shunt trip (STL), and the auxiliary switch design carries 2 auxiliary switches HQ. No undervoltage release, ground-fault monitoring, or communication function is included on this order code.
Panel fit and integration
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth — a standard 3-pole MCCB footprint that fits Siemens SENTRON distribution panels and most DIN-rail or base-mount enclosures. The 3-pole design covers three-phase circuits; line protection design means it is set up for feeder or branch-circuit protection, not motor-protective coordination out of the box. Operating temperature range is -25 °C to 70 °C, storage range -40 °C to 80 °C. The cold end covers freezer and cold-storage environments common in refrigeration and cold-chain applications — the breaker runs cold and stays cold down to -25 °C ambient.