A9N21211 SCHNEIDER ELECTRIC

The A9N21211 from Schneider Electric's ProDis DT40 series is a Vigi K add-on residual current device (RCD) designed to enhance circuit protection. This device combines residual current protection with overcurrent protection, offering comprehensive safety for electrical installations. It is specifically designed to work with DT40 miniature circuit breakers (MCBs). Featuring a 1P+N (one pole plus neutral) configuration, it is suitable for single-phase applications. The device has a breaking capacity of 4.5kA, indicating its ability to safely interrupt short-circuit currents up to this level. It adheres to a C curve tripping characteristic, making it suitable for circuits with moderate inrush currents. The rated current is 32A, specifying the maximum current the device can continuously carry without tripping. It is a Type AC RCD, which detects and responds to sinusoidal alternating current residual currents. The sensitivity is 300mA, meaning it will trip when a leakage current of 300mA or greater is detected, providing a level of protection against earth faults and electric shock.