A single Roadmaster Hy-Power diode handles one trailer lighting circuit with confidence. Aluminum construction dissipates heat reliably while the epoxy seal keeps moisture out through years of road grit and weather.

Install in brake, turn, or running-light lines to enforce one-way current flow and protect both vehicles’ electronics from feedback surges.

• 80 Amp capacity
• Powder-coated aluminum for durability
• Epoxy-sealed enclosure
• Single unit