Lovato P2MB3PD125, Miniature Circuit Breaker, Thermal and Magnetic Trip Type, Three Pole (3P), 10kA, 4.5 Modules, D-Curve Characteristic, 125A

These devices are used to protect against short circuits and overloads of wiring installations and loads in panel boards, office buildings, stores and similar applications. 
Their purpose is circuit protection, circuit isolation and load operation controls. They have characteristics of instantaneous trip defined as follows:
– C-curve: instantaneous trip 5...10 times In for inductive loads (mixed loads, resistive and inductive with low inrush current)
– D-curve: instantaneous trip 10...14 times In for highly inductive loads (loads with high inrush and current such as motors).