Siemens 3VA1180-3EF32-0JC0 — 80 A SENTRON MCCB, Line Protection with Shunt Trip
It delivers a 75.6 kA breaking capacity at 240 V AC, tapering to 52.5 kA at 415 V and 32 kA at 440 V — enough headroom for most industrial service-entrance and feeder applications where high fault current is a given.
Current Ratings — Steady Through 50 °C
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. That is a shallow derate curve — only 6 A lost over a 30 °C rise — so in a warm enclosure with modest ventilation this breaker still carries near its nameplate current.
Interrupting Capacity — Voltage-Dependent, Not Flat
Breaking capacity drops with voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The 11.9 kA at 690 V is the floor — still adequate for most 690 V motor branch circuits, but if your available fault current at that voltage exceeds 12 kA, you need a higher-rated frame or a current-limiting upstream device. The 75.6 kA at 240 V is the headline figure; it covers high-capacity 120/240 V services common in North American panels.
Accessories and Releases — Shunt Trip Fitted
No undervoltage release, no ground-fault module, no communication function. The basic switch is order code 3VA11803EF320AA0.
Environmental Range and Storage
Storage range is wider: -40 °C to 80 °C, covering cold warehouses and hot shipping containers.
Panel Fit — DIN Rail or Direct Mount
At 76.2 mm wide (3 in), this 3-pole MCCB occupies a standard three-module width on DIN rail or direct-mount plate. Depth of 70 mm (2.76 in) leaves clearance for rear-connected busbars and wiring gutters. Height of 130 mm (5.12 in) fits standard 200 mm tall enclosure backplates with room for cable entry above and below.