Siemens 3VA1063-2ED42-0JC0 — Line-Protection MCCB, 63 A, 4-Pole
The Siemens 3VA1063-2ED42-0JC0 is a SENTRON molded case circuit breaker (MCCB) configured for line protection — the core job is protecting cable and bus against overload and short-circuit faults in a distribution panel. Four poles, rated continuous current Iu of 63 A, and a TM210 thermal-magnetic release: the thermal element handles sustained overloads, the magnetic element clears short-circuits fast. A shunt trip (STL) is built in for remote or emergency-off tripping. IP40 on the front keeps tools and fingers out; fine for a ventilated enclosure. Breaking capacity tells you where this breaker can live in a fault-current study. At 240 V it interrupts 52.5 kA; at 415 V it still clears 32 kA. Those numbers put it into a 400 V distribution board with substantial transformer capacity behind it — think a 2 MVA pad-mount feeding a main switchboard. At 690 V it drops to 7.5 kA, which is still adequate for most 690 V motor control centers, but not for a high-fault utility tie. Thermal derating is published all the way to 70 °C — no guesswork. The breaker holds a full 63 A up to 50 °C; at 55 °C it's 60.48 A, at 70 °C it's 56.7 A. If your panel ambient runs hot (poor ventilation, high-density drives), the 50 °C full-rating window gives you headroom. Rated insulation voltage Ui of 800 V confirms the internal creepage and clearance are designed for 690 V systems.
Integration — Footprint & Auxiliary Contacts
Width 101.6 mm, depth 70 mm, height 130 mm. That is the standard 4-pole SENTRON 3VA1 footprint — same mounting hole pattern as the 3VA1010 frame. Two auxiliary switches (HQ type) are factory-fitted; they change state with the main contacts and report position back to a PLC or status lamp. No communication module, no phase-failure detection, no ground-fault monitoring — this is a pure line-protection breaker with a shunt trip for remote clearing. The shunt trip (STL) is the integrated auxiliary release, order code 3VA9688-0BL32. It fires on a separate control voltage — typically 110–240 VAC or 24 VDC — and mechanically trips the breaker independent of the overcurrent mechanism. That makes the 3VA1063-2ED42-0JC0 suitable for emergency-stop circuits, fire-alarm shunt-trip, or remote disconnect from a safety PLC.