The Siemens 3VA1163-5ED32-0BF0 is a SENTRON 3VA1 molded case circuit breaker (MCCB) rated 63 A at 40 °C with a 3-pole configuration. Its interrupting capacity hits 187 kA at 240 V AC — that's the peak short-circuit current it can safely clear without welding contacts or rupturing the case. For the panel builder: the 76.2 mm width (3 in) and 70 mm depth (2.76 in) fit standard 3-pole MCCB cutouts; the 19.8 W max power loss at rated load means you should account for that heat in the enclosure's thermal budget, especially if the breaker is enclosed with other dissipating devices.
Key ratings and what they mean for fit
Rated current holds flat at 63 A from 40 °C through 50 °C, then derates to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. If the panel ambient runs above 50 °C, the breaker must be applied at the derated value — a common oversight in crowded enclosures. Breaking capacity varies with system voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. At 415 V it still handles 121 kA, which covers most industrial distribution fault levels without needing a current-limiting upstream device. Insulation voltage rated 800 V, so it's suitable for 690 V line-to-line systems with margin.
Built-in accessories and design
Factory-fitted with an undervoltage release (UVR) and a 1 auxiliary switch + 1 trip alarm switch HQ. The trip indicator is present, so you get a visual flag on the breaker face after a fault trip — useful for troubleshooting without opening the panel. Designed for line protection (not feeder or motor protection), meaning it's optimized for cable and busbar protection in distribution boards. No communication function and no ground-fault monitoring on this variant.
Physical integration
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 3-pole footprint matches standard Siemens 3VA1 panel cutouts and busbar connections. Storage temperature range -40 °C to 80 °C; operating range -25 °C to 70 °C — the storage limit governs handling and shipping, not running conditions.