Type KTK and KTKR fuses are classified as what type?

Type KTK and KTKR fuses are classified as fast blow fuses. Fast blow fuses are designed to respond quickly to overcurrent conditions, providing rapid protection to circuits from short circuits or overloads. This characteristic is critical in applications where sensitive devices can be damaged by even brief overloads. Fast blow fuses will melt and interrupt the circuit almost immediately when a fault occurs, thus minimizing the risk of damage to connected equipment.

In contrast, time delay or slow blow fuses are designed to tolerate temporary overloads for a short duration and are often used in circuits with motors or other inductive loads where inrush currents can be significantly higher than the normal operating current. High voltage, while relevant in context as a fuse classification, does not apply to the Type KTK and KTKR fuses, which are primarily used in low voltage applications for circuit protection.