Siemens 3RB1026-1NB0 Three Phase Overload Relay

Siemens 3RB1026-1NB0 is a three-phase electronic overload relay designed to protect motors in 3‑pole circuits, providing fast, electronic current sensing and tripping to prevent motor damage. It is rated for a continuous operating current of 0.4 to 1.6 A and supports voltages up to 600 V, making it suitable for small to mid-size industrial motors. This device is specified in Siemens’ Size S0 configuration and is intended for mounting alongside compatible control gear to form a complete motor-protection circuit. When overload conditions are detected, the relay interrupts the main circuit, helping to prevent overheating and extend motor life in demanding manufacturing environments.