The Siemens SENTRON 3VA1163-3EF36-0DA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 63 A at 40 °C ambient — no derating needed until you cross 55 °C, where it steps down to 62 A, then 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. Breaking capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The unit includes an undervoltage release (UVR) as the auxiliary release, and the overcurrent release is a TM240 thermal-magnetic type.
Ratings and what they mean for the panel
The 63 A rating at 40 °C is the current you can count on continuously in a typical 40 °C panel environment. Above 55 °C the derating curve is linear — at 70 °C you lose 5 A, which is about 8% headroom. Plan your thermal budget accordingly if the breaker sits near other heat sources. Breaking capacity of 75.6 kA at 240 V means this MCCB can safely interrupt a fault current up to that level without welding contacts or cascading failure upstream. At 415 V it still handles 52.5 kA — sufficient for most industrial distribution panels. The 11.9 kA rating at 690 V covers higher-voltage drives and motor circuits. Rated insulation voltage is 800 V, so the breaker is suitable for 690 V systems with margin. Maximum power loss is 19.8 W — factor that into enclosure ventilation if you are grouping several breakers.
Mounting and integration
Panel footprint: 130 mm height, 76.2 mm width, 70 mm depth. The 3-pole body mounts on a DIN rail or direct panel; the depth of 70 mm means it fits standard 200 mm deep enclosures without crowding the gland plate. The undervoltage release coil draws from the control circuit — verify polarity and suppression if you are wiring it into a 24 VDC safety chain.