ABB ST202M-K3 Circuit Breaker

ABB ST202M-K3 is a two-pole miniature circuit breaker designed for DIN rail mounting in electrical distribution panels and compact control enclosures, delivering reliable protection in tight spaces. It carries a K-curve trip characteristic, a 3 A nominal current rating, and a 10 kA breaking capacity, which together define how it responds to overcurrents and short circuits while staying within its operating limits. The two-pole format provides coordinated protection for both conductors in a circuit, ensuring fault conditions trip the device quickly and isolate the affected path without requiring additional hardware. Engineered for modular installation on DIN rails, this ABB breaker is well suited for small to mid-size installations in commercial and light industrial environments where space is at a premium and dependable overcurrent protection is essential.