The F-Series hydraulic/magnetic high amperage circuit breakers are designed to handle high current applications in extremely hot and/or cold locations. Due to its time-proven hydraulic/magnetic design, the F-Series load sensing mechanism is insensitive to changes in ambient or enclosure temperature, providing a consistent trip point over temperatures ranging from -40¡ãC to +85¡ãC.In addition, the F-Series circuit breakers come with a choice of overload time delays, making them ideal for critical applications having inductive loads.