Egis 472030 30A Circuit Breaker, Green Blade

If you run an Egis MT Series sealed fuse block on your boat, this is the 30 amp branch you reach for. The 472030 is a blade-style circuit breaker that seats right into the block, protecting a single high-draw circuit and giving you a reset you can throw with your thumb. No tools, no spare fuses to dig for in a drawer.

The green blade isn't just color for looks. Egis color-codes the blades by rating, so green means 30 amps. When you're staring down into a crowded sealed block trying to figure out which breaker feeds the windlass or the bow thruster, that color read saves you time and keeps you from dropping the wrong rating into a circuit. It's the kind of small detail that matters at 6 AM when you're troubleshooting at the dock.

This one's rated at 28 volts DC, so it covers both 12-volt and 24-volt systems without any fuss. That's standard marine practice, and it means you don't have to think twice about whether it fits your house bank or your electronics bus. The breaker trips on an overload, you find and fix whatever pulled too much current, then you push it back in to re-close. That's the whole appeal of a resettable breaker over a one-shot fuse. You're back up and running without a trip to the parts bin.

Who's this for? Anyone wiring or servicing an Egis MT Series block. That's a popular choice on center consoles, cruisers, and fleet vehicles where you want sealed, connectorized power distribution that stands up to spray and vibration. Egis has been building this kind of gear for marine and specialty-vehicle use for over 25 years, and the MT block system is designed so the breakers and fuses share the same sealed housing. The 472030 is the 30 amp piece of that puzzle.

Think about what a 30 amp circuit actually runs on a boat. Bilge pump arrays, a decent-size inverter feed, a trim-tab pump, livewell and baitwell pumps, some lighting runs. These are the loads where a 30 amp breaker earns its keep. Size the breaker to the wire and the load, not just to whatever's blowing, and you've got proper branch-circuit protection that'll reset cleanly when something trips.

A word on wire sizing while you're at it. A 30 amp breaker is only doing its job if the wire feeding the circuit is rated to carry that current over the run length you've got. Short runs on heavier gauge are forgiving. Long runs back to a console block need more copper to keep voltage drop in check and to make sure the breaker, not the wire, is the weak point by design. Get the gauge right and this breaker protects the circuit the way it's meant to.

A quick note on the manual reset. This is a push-to-reset style, which means the breaker stays open until you physically re-close it. That's what you want for most branch circuits. You get a clear signal that something tripped, and nothing re-energizes on its own before you've had a chance to look at it. If you've ever chased an intermittent short that kept auto-resetting and hiding itself, you'll appreciate a breaker that stays put until you tell it otherwise.

This is sold as a single breaker, not a multi-pack and not the block itself. If you're building out a fresh MT block, you'll order the ratings you need across your circuits. If you're just replacing one that's worn or stepping a circuit up to 30 amps, this is the single piece you want. The blade form factor means swapping it is quick. Pull the old one, read the green code, seat the new one.

And because it's part of the Egis sealed system, you're keeping the whole block's weather protection intact. That sealed design is why boaters put these in splash zones and open consoles where an exposed breaker would corrode in a season. Keep it in the family, keep it sealed, keep it simple.