Siemens SENTRON 3VA2063-5KP32-0KA0 — 63 A MCCB with Shunt Trip
The Siemens SENTRON 3VA2063-5KP32-0KA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Its interrupting capacity hits 187 kA at 240 VAC, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3 kA at 690 V. That 187 kA figure at 240 V means it clears high-fault scenarios common on the secondary side of distribution transformers without cascading upstream breakers. The built-in shunt trip release (STL) allows remote tripping via a control signal, useful for emergency-stop or interlock circuits in a panel.
What the Ratings Mean for Your Panel
The 63 A rating is the breaker's continuous current at 40 °C to 70 °C — it holds that value across the entire operating temperature band, so no thermal derating curve to calculate for typical industrial enclosures. The 187 kA interrupting capacity at 240 VAC is the maximum fault current this MCCB can safely interrupt; below that voltage, the breaker handles nearly any fault a 63 A feeder would see in a low-voltage distribution board. At 690 V the IC drops to 3 kA, so this breaker is not intended for 690 V high-fault applications — that's a selection boundary. The shunt trip (STL) release draws power only during the trip event; it does not add continuous coil load to your control transformer.
Panel Integration and Dimensions
The 3VA2063-5KP32-0KA0 measures 105 mm wide, 181 mm high, and 86 mm deep. That 105 mm width is a standard 3-pole MCCB footprint — it fits common DIN-rail or panel-mount cutouts without forcing a layout rework. The 86 mm depth leaves clearance for rear-connected busbars or cable lugs in a typical 600 mm deep enclosure. Rated insulation voltage is 800 V, so it suits 400 V and 480 V distribution panels with margin.