The PN11 4 Pole RCBO (Residual Current Circuit Breaker with Overcurrent Protection) is designed to provide advanced protection for three-phase electrical systems by combining earth leakage, overload, and short-circuit protection in a single compact device. With a 30mA residual current sensitivity, the PN11 RCBO quickly disconnects the circuit when leakage currents are detected, helping protect users against electric shock and reducing the risk of electrical fires. Its integrated overcurrent protection also safeguards electrical wiring and connected equipment from overloads and short-circuit faults. The 4-pole configuration allows simultaneous disconnection of all phases and neutral, making it ideal for three-phase installations in commercial and industrial environments. Its compact DIN rail mounting design ensures easy installation inside distribution boards and control panels. Manufactured for reliable operation and long service life, the PN11 RCBO is an effective solution for modern electrical safety and power distribution systems.