The ABB part ST203M-K50 is a high-quality miniature circuit breaker that ensures reliable and safe protection for your electrical system. Designed with compact dimensions, this circuit breaker is ideal for installations where space is limited. With a maximum current rating of 50 amps, it provides efficient overcurrent protection for various applications. The ST203M-K50 is manufactured by ABB, a respected global leader in electrical solutions, guaranteeing exceptional performance and durability. This miniature circuit breaker is perfect for both residential and commercial uses, offering peace of mind and ensuring the smooth operation of your electrical system.