HWB6 6-Cavity Compact Hard-Wired Box Littelfuse HWB6 Sealed Power Distribution Modules (PDMs) are hard-wired boxes featuring six cavities that accept 2.8mm fuse components. These PDMs are ideal for accessory circuits and overflow circuits from a designer's main PDM. Littelfuse HWB6 can hold plug-in components, including MINI fuses and MINI format circuit breakers. HWB6 features durable construction, an IP67/IP69K rating, and a compact size. Users can customize a design's circuitry utilizing direct wire-to-component connections that are crimped to the wire harness with grommets to seal the bottom of the module.