The Siemens SENTRON 3VA2163-6HL36-0HC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 63 A and a rated insulation voltage Ui of 800 V. Its interrupting capacity hits 242 kA at 240 V and 187 kA at 415 V and 440 V — figures that tell you it's built for high-fault panels where selectivity and SCCR headroom matter. The ETU320 electronic trip unit handles the overcurrent release; a shunt trip (STL) is integrated for remote opening. No undervoltage release, no ground-fault monitoring, no communication module — this is a straight power breaker, not a smart one.
What the ratings mean for fit
The 63 A rating holds flat from 40 °C to 50 °C; above that it derates to 60.6375 A at 55 °C, 58.275 A at 60 °C, 55.9125 A at 65 °C, and 53.55 A at 70 °C. If your panel ambient runs at 60 °C, you lose about 4.7 A — enough to matter on a borderline load. The 242 kA at 240 V is the headline number, but the real-world test is 187 kA at 415 V (common in European industrial distribution) and 121 kA at 500 V. At 690 V it drops to 5 kA — that's the limit for 690 V line-side faults. The 800 V rated insulation voltage means it's suitable for 690 V systems, but the interrupting capacity at that voltage is low enough that you'd typically use it downstream of a current-limiting device.
Panel integration and dimensions
Mounts in a standard panel cutout — 105 mm wide, 181 mm tall, 86 mm deep. The 105 mm width is the standard 3-pole SENTRON 3VA2 frame width; it occupies one 105 mm slot in a multi-breaker lineup. The 86 mm depth leaves clearance for rear-connected busbars or cable lugs. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Power loss is 4 W maximum — negligible for thermal budgeting in a ventilated enclosure.