System protection MCCB with 85 kA interrupting capacity
The Siemens 3VA4195-5ED24-0AA0 is a 2-pole SENTRON molded-case circuit breaker (MCCB) designed for system protection in commercial and industrial distribution panels. Its headline rating is 85 kA interrupting capacity at 240 V AC — that means it can safely clear a fault current up to that level without welding contacts or rupturing the case, which is critical for high-fault service entrances or downstream of large transformers. At 480 V AC the interrupting rating drops to 35 kA, and at 600 Y/347 V it holds at 18 kA. These are the numbers your arc-flash study needs; the breaker's SCCR governs whether it coordinates with upstream gear or forces a redesign.
Thermal derating and ambient temperature
Rated continuous current is 15 A at 40 °C ambient. It holds that same 15 A at 45 °C, then steps down to 14 A at 50 °C through 60 °C, and finally 13 A at 65 °C and 70 °C. If your panel runs hot — near a drive stack or in a poorly ventilated enclosure — this derating curve is what determines whether the breaker nuisance-trips on a warm afternoon.
Panel fit and mounting
Dimensions are 50.8 mm wide, 129.4 mm tall, and 75.1 mm deep. Front face carries IP40 protection — suitable for general indoor panel use where tools or fingers won't contact live parts. No trip indicator on the front; you'll read the handle position to confirm tripped state.