Cutler-Hammer 140U-KTD3-D30 is a circuit breaker trip unit rated at 300 A. It serves as the protective element inside the corresponding breaker, triggering interruption when overcurrent exceeds the set limit. The model 140U-KTD3-D30 specifies the exact trip unit configuration and current rating, enabling clear identification for replacement or maintenance within Cutler-Hammer protection equipment ecosystems.
