The ABB ST203M-K40 is a high-quality circuit breaker designed for efficient protection and control in electrical systems. With its compact and durable design, this DIN rail mountable breaker is perfect for installations in commercial and industrial settings. It features a K curve rating, providing reliable overload and short circuit protection. With three poles and a 40A rating, this circuit breaker ensures the safe and reliable operation of your electrical network. Trust ABB for top-notch quality and performance in circuit protection technology.