What this MCCB is and what the ratings mean
The Siemens 3VA1063-2ED42-0KA0 is a SENTRON molded case circuit breaker (MCCB) for line protection. It carries a rated continuous current Iu of 63 A and an 800 V rated insulation voltage Ui. The 4-pole design means it switches all three phases plus the neutral — you need this for a 3-phase + N system where the neutral must be disconnected for isolation, not just a solid link. The TM210 thermal-magnetic overcurrent release handles the overload and short-circuit protection curve, and the shunt trip (STL) allows remote tripping from an E-stop or PLC output. Breaking capacity is the number that decides whether this part clears a fault without welding its contacts or blowing apart. At 240 V it interrupts 52.5 kA; at 415 V that drops to 32 kA, at 440 V to 13.6 kA, and at 690 V to 7.5 kA. For a 480 V panel, the relevant figure is the 415 V or 440 V rating — whichever is closer to your system voltage — and 32 kA or 13.6 kA covers most industrial service-entrance and feeder duties. The 690 V rating (7.5 kA) matters if you're on a 600 V class system; confirm your available fault current stays under that. Thermal derating is honest on this unit: it holds 63 A flat from 40 °C through 50 °C ambient, then drops to 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. If your panel ambient runs above 50 °C, the continuous load must be reduced accordingly — the numbers are right there, no guessing.
Lifecycle and sourcing posture
For a BOM-line commitment, the 63 A rating, 4-pole configuration, and TM210 release are the fit-defining specs. The part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
Panel fit and integration notes
The MCCB measures 70 mm deep, 101.6 mm wide, and 130 mm tall. That width (101.6 mm) is roughly 4 inches — standard for a 4-pole MCCB in this class, so it fits a typical panel-mounted footprint. Depth of 70 mm means it clears most shallow enclosures, but check your gland-plate depth if the breaker is near the back wall. Front protection is IP40 — fine for a dry indoor panel, but not rated for washdown or dust. No auxiliary contact version is fitted, and there's no trip indicator on the front. If you need remote status signaling, the shunt trip (STL) is the only integrated auxiliary release; for contact feedback you'd add an external auxiliary switch (the listed trip unit accessory 3VA9688-0BL33 is the integrated auxiliary trip component).