Blue Sea 2203 Black Terminal Feed Through Connector

The Blue Sea 2203 Black Terminal Feed Through Connector is purpose-built for boaters and marine electricians who need a reliable, code-compliant way to route high-current cables through hulls, decks, and bulkheads without compromising structural integrity or safety. After years of running boats and managing onboard electrical systems, you know that cable routing decisions directly impact both performance and longevity—especially when passing heavy-gauge power lines to auxiliary systems, battery banks, or through-hull equipment. This connector eliminates the guesswork and potential damage that comes from drilling unsupported holes.

The 2203 features a sealed terminal design that provides strain relief at the penetration point, protecting cables from abrasion, moisture ingress, and the constant flexing that occurs in a marine environment. Blue Sea Systems engineered this connector with a compact, through-hull profile that minimizes water exposure while maintaining full contact area for reliable current transfer. The black finish resists corrosion and UV damage—critical for hardware that sits exposed on deck or within engine compartments. Installation involves feeding the cable through the connector body and securing it with the integral compression fitting, creating a watertight seal that meets ABYC and USCG standards for marine electrical systems.

This connector works best in applications where you're routing battery cables, inverter power lines, or alternator output through structural members—places where a traditional cable gland would fail due to space constraints or multiple conductor requirements. Anglers upgrading to larger trolling motor systems, cruisers adding solar arrays, or anyone installing auxiliary power systems will appreciate the professional-grade protection it provides. Verify cable diameter compatibility with your installation before ordering, and ensure the connector matches your wire gauge for safe current handling on the water.