Breaking capacity across voltages
The 3VA1163-5EF36-0DA0: The interrupting rating drops as system voltage rises: 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. For a 480 V panel (common in North America), you'd use the 440 V figure as a conservative benchmark — 75.6 kA still covers most industrial service entrances. At 690 V, the 17 kA limit means you need to verify the available fault current at the breaker's location; if it's higher, step up to a higher-rated frame.
Thermal derating and ambient limits
The breaker holds full 63 A rating up to 50 °C ambient. Above that, it derates linearly: 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. If your panel runs hot — say, near a furnace line or in a non-ventilated enclosure — you'll need to account for that drop. Operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Undervoltage release and line protection design
This variant includes an undervoltage release (UVR) — a shunt that trips the breaker when supply voltage drops below a set threshold, protecting downstream equipment from brownout damage. It's designed for line protection, meaning it's set up to guard the feeder, not a specific motor or load. No communication function, no ground-fault monitoring, no voltage-trigger accessory. The trip indicator is absent, so you won't get a local flag — plan on using the auxiliary contact block if you need remote status.
Panel fit and power loss
Dimensions: 130 mm high, 76.2 mm wide (3 inches — standard for a 3-pole MCCB), 70 mm deep. That's a 3-inch-wide footprint, so it fits a standard distribution panel cutout. Rated insulation voltage is 800 V. Maximum power loss at rated current is 19.8 W — not negligible in a sealed enclosure; factor it into your thermal calculation if you're packing multiple breakers in a small cabinet.