Single element, fast acting fuses with minimal time delay. Provides high degree of short‑circuit limitation (component protection). Particularly suited for circuits with no heavy surge currents of motors, transformers, solenoids, and welders. These fuses are commonly used to protect circuit breakers with lower interrupting ratings. If used on circuits with surge currents (motors, ect.) must be sized to prevent unwanted opening and thus only provide short‑circuit protection.