What this MCCB carries and what that means for your panel
The Siemens 3VA2063-7KQ36-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated 63 A continuous at 70 °C ambient — no derate needed up to that temperature, which simplifies panel layout in warm enclosures. The 3-pole line-protection variant uses an ETU860 electronic trip unit, giving you adjustable long-time, short-time, instantaneous, and ground-fault protection curves. Interrupting capacity hits 330 kA at 240 V and 242 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. The communication function (likely via PROFIBUS or PROFINET on the 3VA2 platform) lets a PLC or BMS read trip events and load current — useful for predictive maintenance on a critical feeder.
Integration and mounting
The 3VA2063-7KQ36-0AA0 measures 181 mm high, 105 mm wide, and 86 mm deep — a standard 3-pole MCCB footprint that fits most Siemens and third-party panelboards. Front IP40 protection means it's suitable for general-purpose indoor panels; no washdown rating, so keep it out of wet zones. The optional motor drive allows remote racking or reset, which is worth specifying if the breaker lives in a restricted-access cabinet.
Selectivity and coordination notes
With 63 A continuous rating and interrupting capacity that drops to 3 kA at 690 V, this breaker is sized for low-voltage distribution up to 800 V insulation class (Ui). The ETU860 release supports zone-selective interlocking (ZSI) when paired with downstream SENTRON breakers, which reduces arc-flash energy on a fault by limiting the upstream trip delay. No undervoltage release or shunt trip is built in, so add those externally if the application requires emergency-off or undervoltage protection.