Find trusted D curve circuit breaker factories with CE, UL, and CB certifications. Click to explore verified suppliers now. The global miniature circuit breaker (MCB) market, including D curve variants designed for high inrush current applications like motors and transformers, continues its robust expansion. Current estimates place the market size at approximately USD 4. As a China-based manufacturer, supplier, and factory, Jieyung's commitment to top-notch electrical products is evident in the D Curve Breaker's design and. The D-Curve-Circuit-Breaker is included in our comprehensive Circuit Breaker range. Additionally, purchasing in wholesale quantities ensures consistent quality and timely inventory replenishment.