What it is and what it does
The Siemens 3VA1010-3ED42-0KC0 is a SENTRON 4-pole molded case circuit breaker (MCCB) rated for line protection — the job it does is protecting cables and busbars from overloads and short circuits in a distribution panel. It carries a rated continuous current Iu of 100 A and holds that rating from 40 °C up through 50 °C, then derates to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. That means in a warm panel — say one sitting near a motor drive or in a non-climate-controlled room — you still get the full 100 A up to 50 °C, which is a solid margin for most industrial builds. The interrupting ratings climb with voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. On a 480 V system common in North American plants, that 32 kA at 440 V is the closest published figure and tells you it handles high-fault scenarios without needing a current-limiting fuse upstream. It uses a TM210 thermal-magnetic overcurrent release — the thermal element handles overloads, the magnetic element handles short circuits, and the trip curve is fixed, so you don't have to worry about setting adjustments on the breaker itself. The insulation rating is 800 V Ui, which keeps it comfortable on 480/600 V systems. It carries two auxiliary switches (HQ version) for status feedback to a PLC or panel lamp, and includes a shunt trip (STL) for remote tripping — useful in emergency-stop circuits or automated disconnects.
Panel fit and mounting
The breaker measures 101.6 mm wide by 130 mm tall by 70 mm deep. That 101.6 mm width is a standard 4-pole MCCB footprint — it fits a typical 4-module wide cutout or a DIN-rail adapter plate. The 70 mm depth is shallow enough for a 200 mm deep enclosure with room for wiring behind it. Front protection is IP40, so it's fine in a clean panel but not for washdown areas. The auxiliary switches are built in — no separate module to snap on — which saves a slot in the panel layout.