Enhance the safety and control of your electrical systems with genuine ABB release coils for the Tmax series of molded case circuit breakers. This listing covers the YO-1SDA038292R1 undervoltage release and the YC-1SDA038302R1 shunt opening release. The undervoltage release (YO) automatically trips the circuit breaker when the control voltage drops below a specified threshold, protecting sensitive equipment from damaging low-voltage conditions. The shunt opening release (YC) enables remote tripping of the circuit breaker upon receiving a voltage signal, making it ideal for emergency shutdowns and automated control systems. Both accessories are designed for seamless integration with ABB Tmax T4 and T5 circuit breakers, ensuring reliable performance and adherence to safety standards.