Which of the following is NOT a component of a Single Element Fuse?

A single element fuse is a device designed to protect electrical circuits from overloads by melting a conductor (the element) to interrupt the flow of current. The main components of a single element fuse typically include:

• The tube, which houses the fuse elements and provides protection against environmental factors.

• The element itself, which is the part that melts when a specified current is exceeded, thus breaking the circuit.

• Arc quenching materials or filters may be present to extinguish any arc that forms when the fuse element melts, ensuring that the interruption of current happens safely.

The fuse holder, however, does not form a part of the single element fuse itself. Instead, it serves as the point where the fuse is mounted in the electrical circuit, enabling easy replacement and secure connection but does not play a direct role in the fusing operation itself. Therefore, identifying the fuse holder as not being a component of a single element fuse highlights its distinction from those elements that directly contribute to the fuse's operational function.