The Siemens 3VA1112-5ED32-0KH0 is a SENTRON molded case circuit breaker (MCCB) rated for line-protection duty — 3-pole, 125 A continuous at 40 °C, with an interrupting capacity of 187 kA at 240 V AC. The interrupting rating drops to 121 kA at 415 V and 75.6 kA at 440 V, so verify your system voltage against the curve before committing the BOM line. The 125 A rating holds flat from 40 °C through 50 °C, then derates to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. That means you can remote-trip the breaker from a safety circuit or E-stop string, and the auxiliary contacts report breaker position back to the PLC or SCADA. No undervoltage release fitted — if you need UVR, this order code isn't it.
Lifecycle and compliance — current production, no obsolescence concern
No DIN-rail mounting on this class; it's screw-fixed to a backplate or busbar system.