The Siemens 3VA1063-3ED36-0DA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current (Iu) at 40 °C, with a 3-pole configuration and a TM210 thermal-magnetic overcurrent release. This is a line-protection device — not a motor-protective breaker — so it is sized for feeder or distribution circuits where the load is resistive or a mix, not for direct motor starting duty. The interrupting ratings are 75.6 kA at 240 V and 52.5 kA at 415 V, which gives substantial fault-clearing headroom on a 400 V panelboard; at 690 V it drops to 7.5 kA, so verify the available fault current if this lands on a 690 V bus. The front face carries an IP40 rating, meaning it is protected against tools and wires above 1 mm but not against water ingress — standard for enclosed switchgear.
Thermal derating and ambient limits
The 63 A rating holds flat from 40 °C through 50 °C. Above that it begins to taper: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. If the panel ambient runs warm — say a crowded enclosure near a process line — the continuous load must be backed off accordingly. The operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The latching endurance is rated at 15 000 operations, which is typical for a distribution MCCB not cycled daily.
Mounting and integration
The 3VA1063-3ED36-0DA0 measures 130 mm high, 76.2 mm wide, and 70 mm deep. It is designed for DIN-rail mounting in a standard distribution panel. The width of 76.2 mm (3-module wide) fits a typical 3-pole MCCB footprint. No auxiliary contact version is included, so if remote status indication is needed, an auxiliary contact block must be added separately. The insulation voltage rating is 800 V, which covers 480 V and 600 V class systems with margin.