What the ratings mean for your panel
The Siemens 3VA2063-5JP32-0AF0 is a SENTRON molded case circuit breaker rated for 63 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling, which simplifies panel thermal budgeting. The interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. The ETU550 electronic release gives adjustable long-time (tr 0.5–25 s) and short-time delay (tsd up to 0.5 s), letting you coordinate selectively with downstream breakers. Front protection is IP40, meaning tools and fingers stay out, but it is not sealed against washdown — install in a clean, dry enclosure.
Mounting and integration
The 3VA2063-5JP32-0AF0 measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard three-pole MCCB footprint for DIN-rail or panel-mount installation. The 86 mm depth fits typical distribution board gutters; verify gland-plate clearance if back-panel wiring is tight. The ETU550 release is field-adjustable via the front dials, so no software tool is needed for coordination setup.