63 A MCCB with 187 kA SCCR — what the ratings mean for your panel
The SENTRON 3VA1163-5EF36-0KH0 is a 3-pole molded case circuit breaker rated for line-protection duty, carrying a continuous current of 63 A at 40 °C ambient — no derating needed up to 50 °C, where it still holds 63 A (cites:,). Above that, it drops to 62 A at 55 °C and 58 A at 70 °C (cites:,). The headline breaking capacity is 187 kA at 240 V AC, which means it can safely interrupt a fault current up to that level without upstream fuses needing to clear first — useful for high-fault utility feeds or transformer secondaries (cite:). At 415 V it still handles 121 kA, and at 690 V it holds 17 kA (cites:,). Rated insulation voltage is 800 V (cite:).
Deployment context — panel integration and auxiliaries
This breaker mounts on a DIN rail or panel plate — the 76.2 mm width (3 in) and 130 mm height (5.12 in) fit standard SENTRON 3VA cutouts (cites:,). Depth is 70 mm (2.76 in), which leaves clearance for rear terminals and wiring ducts (cite:). The auxiliary switch block is factory-configured with two auxiliary switches plus one trip alarm switch (HQ type) — that covers status feedback and remote trip indication without an add-on module (cite:). A shunt trip release (STL) is built in, so a remote signal can trip the breaker for emergency stop or interlock schemes (cite:). No undervoltage release is fitted (cite:). Max power loss is 17.3 W — factor that into enclosure thermal rise if the panel is sealed (cite:).
Operating range and environmental limits
The breaker operates from -25 °C to +70 °C ambient; storage range is -40 °C to +80 °C (cites:,). The thermal-magnetic trip curve is calibrated for the listed current ratings across that span — no additional compensation needed. The unit includes a trip indicator (cite:). No communication function is built in (cite:); this is a standalone line-protection device, not a smart breaker.