Siemens SENTRON 3VA1063-4ED36-0CC0 — 63 A MCCB with Undervoltage Release
The Siemens SENTRON 3VA1063-4ED36-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 63 A at 40 °C ambient and derating to 58 A at 70 °C. Its interrupting capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, and 11.9 kA at 690 V — figures that govern fault-clearing coordination downstream. The unit ships with an integrated undervoltage release (UVR) and two auxiliary switches HQ, so it arrives ready for shunt-trip or status-feedback wiring without separate accessory purchases.
Breaking Capacity and Selectivity Planning
At 240 V the 121 kA SCCR places this MCCB well above typical service-entrance or feeder-breaker requirements in North American panels, where 65 kA or 100 kA are common benchmarks. The 75.6 kA at 415 V suits European 400 V distribution where fault levels often hit 50–70 kA. The 11.9 kA at 690 V is the limiting case — if your transformer secondary or motor-circuit fault current exceeds that, you need a current-limiting upstream device or a higher-rated frame. The 800 V rated insulation voltage confirms the breaker is rated for 690 V line-to-line applications.
Thermal Derating and Panel Integration
The 63 A rating holds flat from 40 °C through 50 °C, then drops one amp per 5 °C step to 58 A at 70 °C. In a sealed enclosure with multiple breakers ganged, the 19.8 W maximum power loss per unit adds up — a four-breaker subfeed panel dissipates nearly 80 W internally. The 76.2 mm width (3 in) and 70 mm depth (2.76 in) fit standard 3-pole MCCB footprints; the 130 mm height (5.12 in) clears most 200 A panelboards without a gutter extension.
Lifecycle and Sourcing
The lifecycle stage is marked as current — this is an active-production part in the SENTRON 3VA series. No successor or phase-out notice is on record.