Overview

The Blue Sea Systems 5049 is a jumper for ST CLB circuit breaker blocks that bridges two adjacent circuits on the block. It is used when a layout calls for tied circuits instead of keeping every breaker position isolated, and it comes in a 5-pack for new installs, panel changes, or keeping spares on board.

It fits Blue Sea Systems ST CLB breaker block layouts, including the 6-circuit and 12-circuit versions with or without a negative bus. In those systems, the compatible breaker blocks are used on 32V DC circuits and allow up to 40A per jumped circuit group, so this jumper matters when you are planning how adjacent protected circuits will be combined on the block.

Key features

• Links two adjacent positions on a Blue Sea Systems ST CLB circuit breaker block
• Fits ST CLB breaker block models 5050, 5051, 5052, and 5054
• Used for jumped circuit group layouts where separate positions need to be tied together on the block
• Keeps the connection at the block instead of adding a short external jumper wire
• Sold as a 5-pack

Compatibility and fit

This part is not a breaker and not a fuse. It is a connection accessory for ST CLB breaker blocks, so the main fit question is the block family on your boat. If the panel uses another breaker block or another terminal layout, this jumper is not the right piece.

Installation and setup

The jumper mounts across two terminal screws on the breaker block. That keeps the connection easy to inspect later and helps the distribution area stay cleaner than a hand-made wire link, especially in tight helm, cabin, or accessory panel spaces where service access matters.

Use cases on board

This is a practical add-on for refits or new builds that use ST CLB blocks for lighting, pumps, electronics, or other DC branch circuits and need adjacent positions tied together. It also suits installers who want a consistent block layout instead of mixing in custom jumpers during the job.

What’s included

• Five ST CLB circuit breaker block jumpers