The Siemens SENTRON 3VA1050-3ED36-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection duty. It carries 50 A continuously at 40 °C and delivers a 75.6 kA interrupting capacity at 240 VAC — enough to handle high-fault utility feeds or transformer secondaries in a distribution panel.
Key ratings and what they mean for fit
The 50 A rating holds steady from 40 °C through 50 °C, then derates to 49 A at 55 °C and 45 A at 70 °C — useful to know if the breaker sits near other heat sources in a crowded enclosure. The 75.6 kA at 240 V is the headline fault-clearing number; at 415 V it still breaks 52.5 kA, and at 690 V it holds 7.5 kA. That means it can be applied on 480 V delta or 600 V wye systems as long as the available fault current stays under the published curve. Rated insulation voltage is 800 V, so the breaker's internal clearance and creepage are designed for 690 V line-to-line systems with margin. The 3-pole construction fits standard three-phase feeders — motor branch circuits, lighting panels, or sub-feed distribution.
Built-in accessories and panel integration
This variant ships with a shunt trip (STL) release and two auxiliary switches (HQ type) factory-installed. The shunt trip allows remote tripping from a PLC or emergency-stop circuit; the auxiliary switches provide status feedback — open/closed indication to a control system or indicator lamp. No field-add-on kit needed for these functions. Dimensions are 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that fits SENTRON panelboards and most DIN-rail adapters.