The housing features a modular design, with its basic structure comprising the following components:
Removable Protective Cover: Typically equipped with snap-lock fasteners that require a flat-head tool to open.
Fuse Slots: Segmented and labeled according to current ratings; select models support the mixed installation of MINI fuses and slow-blow fuses.
Locking Mechanism: This patented technology utilizes a 2.15 mm thick locking tab paired with a guide block to maintain the operational clearance of the conductive contact within ±0.5 mm.

Material selection prioritizes both thermal resistance and insulation properties:
Standard Plastic: Low cost, but with a maximum temperature limit of approximately 105°C.
PBT Engineering Plastic: Capable of withstanding temperatures exceeding 150°C.
Bakelite: Possesses excellent flame-retardant properties.
