The ABB KT5S4 is a high-quality shunt trip accessory designed for seamless integration with T4, T5, and T6 circuit breakers. This field-installable unit operates effectively within a voltage range of 110-125VAC/DC, ensuring reliable performance in various electrical setups. Compact in design, the KT5S4 measures 1.04 inches in height, 1.59 inches in width, and 2.67 inches in depth, and weighs only 1.6 ounces. Ideal for enhancing circuit breaker functionality, this shunt trip accessory is a must-have for ensuring safety and efficiency in electrical systems.