CBI D2ALX20355 4-Pole DC Circuit Breaker

The CBI D2ALX20355 is a four-pole DC circuit breaker designed to interrupt fault currents across all four poles in unison, providing overcurrent protection for DC power circuits in industrial control panels and DC distribution networks. It is rated for 80 V DC with a 375 A trip threshold, delivering reliable protection for high-current DC loads and enabling coordinated interruption across multiple conductors in a single device. The device is identified as a Delay-BS variant, reflected in the model suffix. The four-pole construction simplifies wiring by isolating four separate conductors simultaneously, making it suitable for applications such as DC bus protection, motor control circuits, and energy-storage or power-conversion systems that require robust, space-efficient protection. As part of the CBI D2ALX line, the D2ALX20355 follows the series’ design approach for four-pole DC protection, supporting straightforward deployment in assemblies that require coordinated tripping across multiple conductors.