Product Description: The ABB S5N300TW-2 is a Molded Case Circuit Breaker from the SACE Isomax family. It features a 2-pole design with a 600V, 300A rating and a 35kA@480V AIC rating. This breaker includes Thermal Magnetic protection and uses a Bolt-On connection. The frame size is S5, and it weighs 11.25 lbs.