The Powerpact™ J-Frame Circuit Breakers Are Designed To Protect Electrical Systems From Damage Caused By Overloads And Short Circuits. J-Frame Circuit Breakers Are Available With Either Thermal-Magnetic Or Micrologic™ Electronic Trip Units. The Amperage Ratings Of The Thermal Trip Elements Are Calibrated At 104°F (40°C) Free Air Ambient Temperature. Per The National Electric Code® (Nec®) And The Canadian Electrical Code, Standard Circuit Breakers May Only Be Applied Continuously At Up To 80% Of Their Rating. This Powerpact J Circuit Breaker Is A Removable Handle Padlock Device. This Product Complies To Ul & Csa Certifications.