The ABB KT5S3 is a high-quality shunt trip designed for seamless integration with T4-T6 circuit breakers. This field-installable unit operates effectively within a voltage range of 380-440VAC, ensuring reliable performance in various electrical setups. With a compact and durable design, the KT5S3 weighs just 1 lb, making it easy to handle and install. Ideal for enhancing circuit breaker functionality, this shunt trip accessory is essential for safety and operational efficiency in electrical systems.