The Siemens SENTRON 3VA2063-5JQ32-0KL0 is a 3-pole molded case circuit breaker rated for 63 A continuous at 40 °C through 70 °C — no derating needed across that full ambient span, which simplifies panel layout in warm enclosures. Its interrupting capacity hits 187 kA at 240 VAC, 121 kA at 415 VAC, and 75.6 kA at 500 VAC, dropping to 3 kA at 690 VAC. That 187 kA figure at 240 V means it handles high-fault scenarios like transformer-fed sub-distribution without cascading upstream breakers.
Ratings and what they mean for fit
The 63 A full-scale rating with a 16 A initial setting range (adjustable from 16 A to 63 A) gives you flexibility to tune the trip threshold to the actual load without swapping the breaker. The interrupting curve tells the real story: at 240 V it clears 187 kA, at 415 V it clears 121 kA, at 500 V it clears 75.6 kA, and at 690 V it clears 3 kA. For a 480 V panel, the 75.6 kA rating is the number that governs — not the headline 187 kA. That 3 kA at 690 V is a hard limit; if your system runs 690 V with fault current above that, this breaker is not the fit. The breaker includes a communication function and comes with a shunt trip release (STL) plus an auxiliary switch configuration of 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch. That means it can report its status and trip events back to a PLC or BMS — useful for remote monitoring in a distributed line-up. No undervoltage release is fitted, so if undervoltage protection is required, it must be added externally.
Panel integration and dimensions
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep. That 105 mm width is the critical dimension for multi-pole grouping in a panel — it determines how many breakers fit across a given backplate. The 86 mm depth means it clears most standard 200 mm deep enclosures with room for rear bus bars or wiring ducts. Maximum power loss is 5.4 W, so heat dissipation in a sealed panel is manageable; no forced cooling required for a single unit.
Environmental limits and approvals
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limit governs handling and warehousing, not running conditions. The product is designed for line protection — meaning it protects cables and bus bars from overload and short-circuit, not motor or generator circuits directly. The basic switch variant is 3VA20635JQ320AA0, which is the internal switching mechanism.