The Siemens SENTRON 3VA1063-4ED42-0KA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection. It carries a continuous current of 63 A at 40 °C, with no derating needed up to 50 °C — the rating holds flat at 63 A through that range. At 55 °C it's still 62 A, and at 65 °C it's 60 A, so the thermal margin is generous for a standard 63 A bus in a warm enclosure. Interrupting capacity is the headline number here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA at 240 V means it can sit on a high-fault panelboard downstream of a large transformer without needing a current-limiting fuse upstream — the breaker clears the fault itself. The 11.9 kA at 690 V is the figure to check if you're on a 690 V industrial system; it's still adequate for most motor-control-center applications, but verify against your available fault current. Rated insulation voltage is 800 V, so the breaker is rated for use on 690 V systems with margin. The overcurrent release is a TM210 thermal-magnetic type — fixed thermal and magnetic settings, no electronic adjustment. A shunt trip (STL) auxiliary release is built in, meaning a remote trip signal (from a safety relay, E-stop, or PLC output) can open the breaker without a handle operation. No undervoltage release is fitted on this variant.
Dimensions & Panel Fit
The breaker measures 130 mm high, 101.6 mm wide, and 70 mm deep. The 70 mm depth is the dimension that matters for enclosure depth — it fits a standard 200 mm deep panel with room for wiring gutters. Width of 101.6 mm (4 inches) is the standard 4-pole MCCB footprint for this current class; it occupies four 25 mm (1 inch) pole spaces on a DIN rail or panel-mount base. Height of 130 mm (5.12 inches) is compact enough for a 600 mm tall enclosure with two breaker rows.
Environmental & Compliance
Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. Maximum power loss is 17.3 W — relevant for thermal calculations in a sealed enclosure with multiple breakers ganged together. No communication function, no trip indicator, and no ground-fault monitoring on this variant; it is a straightforward thermal-magnetic line-protection breaker with a shunt trip for remote opening.