What this MCCB is and what it protects
The Siemens 3VM1116-5ED32-0AA0 is a SENTRON molded case circuit breaker (MCCB) configured for line protection — it guards feeders and distribution branches against overloads and short circuits, not motor or generator circuits. It carries a TM210 thermal-magnetic overcurrent release, meaning the thermal element handles sustained overloads and the magnetic element clears high faults instantly. Rated for 160 A continuous at 40 °C through 50 °C, it derates to 150 A at 70 °C ambient, so the actual ampacity in a warm enclosure is lower than the nameplate — plan the load accordingly.
Breaking capacity — what the numbers mean for fault clearing
This 3-pole MCCB delivers 187 kA at 240 V AC, 121 kA at 415 V AC, 76 kA at 440 V AC, and 17 kA at 500 V AC. Those are the maximum fault currents it can safely interrupt at each voltage level without welding contacts or rupturing the case. For a 480 V panel, the 76 kA at 440 V is the closest published figure — the actual interrupting rating at 480 V will be lower, so verify against the available fault current at the point of installation. The insulation voltage is rated 800 V, and the maximum operating voltage is 690 V AC or 500 V DC, so it fits standard 400 V and 480 V distribution without issue.
Panel fit and environmental limits
The 3VM1116-5ED32-0AA0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a compact footprint for a 160 A MCCB. It mounts on a DIN rail or directly to a panel backplate; the IP40 protection on the front means it's splash-resistant on the operator face but not sealed against hose-down. Operating temperature spans -25 °C to 70 °C, storage from -40 °C to 80 °C. Maximum power dissipation is 38 W, so factor that into enclosure thermal calculations — in a sealed cabinet, that heat adds up.