What it is and what it does
The Siemens 3VA2063-8HN36-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous rated current of 63 A across the full ambient temperature range from 40 °C to 70 °C, meaning no derating is needed for normal panel conditions — that 63 A holds all the way up to 70 °C ambient. The 3-pole configuration and ETU350 electronic overcurrent release give it adjustable trip characteristics for selective coordination downstream. Breaking capacity hits 330 kA at 415 V and 440 kA at 240 V — that's serious fault-interruption headroom for high-capacity switchboards or transformer secondaries.
Breaking capacity across voltages
Rated short-circuit breaking capacity varies by system voltage: 440 kA at 240 V, 330 kA at both 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. That 330 kA at 415 V is the figure most buyers will use for 400 V-class industrial networks — it tells you this breaker can clear a bolted fault at the main distribution point without upstream fuses needing to open.
Panel fit and environment
Footprint is 105 mm wide by 181 mm tall by 86 mm deep — a standard 3-pole MCCB form factor that drops into most SENTRON mounting bases or panel-mount cutouts. IP40 on the front means it's protected against tools and wires >1 mm entering the face, but the body itself isn't sealed for washdown; this is a dry-indoor panel breaker. Operating temperature range spans -25 °C to 70 °C, storage from -40 °C to 80 °C. Maximum power loss is 3 W — negligible for panel thermal budgeting.
Lifecycle and sourcing
Lifecycle stage is marked as current — this is an active-production part in the SENTRON 3VA series. No end-of-life notice or successor has been published. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.