Enhance the functionality and safety of your electrical systems with genuine ABB accessories for Tmax series circuit breakers. The YO-1SDA038292R1 is an undervoltage release (YO) designed to automatically trip the circuit breaker when the line voltage drops below a preset threshold, protecting sensitive equipment from damage. The YC-1SDA038302R1 is a closing release (YC) that enables remote electrical closing of the circuit breaker, making it ideal for automation and remote control applications. Both components are engineered for seamless integration with ABB Tmax T4 and T5 moulded case circuit breakers, ensuring reliable performance and adherence to international standards.