Egis 472005 5-Amp Tan Blade Circuit Breaker

The 472005 from Egis Mobile Electric is a 5-amp, 28-volt DC blade-style circuit breaker. It's a single breaker, tan bladed, and it's made to seat in the Egis MT Series sealed fuse blocks. If you've already got an MT block wired up on your boat, this is the part that protects one 5-amp branch coming off it.

Here's the nice thing about a blade breaker over a plain blade fuse. A fuse is one and done. It blows, you dig through the glovebox or the dock box for a spare, and you hope it's the right rating. This breaker resets. When it trips, you figure out what caused the overload, fix it, and push the breaker back in. You're back in business without a spare in hand. For gear you actually depend on out there, that matters.

Tan is the amp code. On the standard blade color scale, tan means 5 amps, the same way those colors run on ATC and MINI fuses. So when you're staring at a row of breakers in an MT block, the color tells you the rating at a glance. That's a small thing until you're troubleshooting a dead circuit at dusk and need to know what's what fast.

Five amps is the right size for the small stuff. Think nav lights, a bilge pump control circuit, a stereo head unit, a VHF, cabin LEDs, accessory sockets. Size the breaker to the wire and the load, not higher. A breaker that's rated too high won't protect the wire it's feeding, and that's the whole point of having one.

It's rated to 28 volts DC, so it covers both 12-volt and 24-volt systems. Most boats run 12V house and engine circuits. If you've got a 24V bow thruster or trolling setup, the same breaker works there too. Manual reset means it stays open after a trip until you physically push it closed. No auto-cycling, no surprise re-energizing of a faulted circuit while you've got your hands in the panel.

Installation is straightforward if you're already running an MT block. The breaker's blades seat into the block's breaker position the same way a fuse would. Match the breaker rating to the wire gauge feeding that circuit. For a 5-amp branch you're typically on 16 or 18 AWG primary wire, but follow ABYC ampacity tables and your own load math. Keep your crimps clean and your terminals tight. A loose connection makes heat, and heat is what kills marine electrical gear.

Egis Mobile Electric has been building vehicle and marine electrical gear for more than 25 years, and the MT Series blocks are their sealed, connectorized answer to the mess of loose inline fuses a lot of boats end up with. Using the matched breakers keeps the whole block sealed and tidy.

What this isn't: it's not a standalone panel breaker with its own mounting studs, and it's not a replacement for the larger feed breaker on your main block. It's a single branch-circuit breaker for the MT block system. If you need a different amp rating for a different circuit, Egis makes the same breaker in other ratings, each with its own blade color.

If it keeps tripping, don't just reset it and walk away. A breaker that trips is telling you something. Usually it's a genuine overload, too much load on a 5-amp circuit, or a short somewhere downstream, a chafed wire grounding against the hull or a corroded connection pulling current. Chase the cause before you rely on the circuit again. That's the discipline that keeps a boat's wiring honest.

This listing is for a single breaker. If you're populating a fresh MT block, count your circuits and order the ratings you need for each one. Keeping a spare or two of the ratings you use most is smart. They don't take up much room, and having the right rating on hand beats improvising at the ramp.