63 A MCCB with undervoltage release — line protection for distribution panels
The Siemens SENTRON 3VA1063-2ED36-0DA0 is a 3-pole molded case circuit breaker (MCCB) rated 63 A at 40 °C, designed for line protection in power distribution. Its breaking capacity reaches 52.5 kA at 240 V, 32 kA at 415 V, and 7.5 kA at 690 V — figures that govern its ability to safely interrupt fault currents at the installed voltage level. The 70 mm depth and 76.2 mm width fit standard panel layouts, and the unit ships with an integrated undervoltage release (UVR) for coordinated emergency-stop or loss-of-supply tripping.
Breaking capacity across voltage — what the ratings mean for fit
The 52.5 kA at 240 V is the highest short-circuit current this MCCB can interrupt at that voltage; at 415 V the capacity drops to 32 kA, and at 690 V to 7.5 kA. These are the values to compare against the available fault current at the installation point — if the prospective short-circuit current at 415 V exceeds 32 kA, this breaker is not the right choice for that location. The insulation voltage is rated 800 V, so the breaker itself is insulated for use on 690 V systems.
Thermal derating and operating range
Rated current holds 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. The TM210 overcurrent release handles the thermal-magnetic trip curve. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 19.8 W.