63 A SENTRON MCCB with undervoltage release
The Siemens 3VA1063-4ED36-0CA0 is a SENTRON molded case circuit breaker rated for continuous current of 63 A at 40 °C, with no derating needed up to 50 °C — it holds the full 63 A at 50 °C, then tapers to 58 A at 70 °C. That's a solid thermal curve for a warm panel. Three-pole construction with a TM210 thermal-magnetic trip unit. The interrupting capacity hits 121 kA at 240 V, 75.6 kA at 415 V, and still clears 11.9 kA at 690 V — that's high-fault headroom for a 63 A frame. This variant ships with an undervoltage release (UVR) built in, designated as an undervoltage release type. The insulation voltage is rated 800 V, and maximum power loss is 19.8 W.
Panel fit and integration
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that mounts directly to a backplate or DIN rail adapter. The UVR coil terminals are accessible on the front face; verify polarity and control voltage before energizing.