MCCB for line protection — 50 A, 3-pole, TM210 release
It is built for line protection — the standard role of guarding feeder and branch circuits against overload and short-circuit faults in a distribution panel. The 52.5 kA breaking capacity at 240 V (32 kA at 415 V, 13.6 kA at 440 V, 7.5 kA at 690 V) gives it the interrupting muscle for high-fault-current industrial mains, not just light commercial service.
Above that, the TM210 release begins to thermally derate: 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, 45 A at 70 °C.
Shunt trip and auxiliary release
This variant includes a shunt trip (STL) — a voltage-triggered release that lets a remote signal (emergency stop, PLC output, pressure switch) open the breaker independently of the overcurrent trip. The integrated auxiliary trip accessory is order code 3VA9688-0BL30. If you need remote status feedback or undervoltage protection, you are looking at a different 3VA variant.
IP40 on the front (finger-safe), open frame behind. The width is the critical dimension for multi-breaker row spacing in a distribution board; 76.2 mm per pole translates to about 3 inches per breaker in a row.