Egis Mobile 3201-05 5A Panel Mount Circuit Breaker

The Egis Mobile Electric 3201-05 is a 5-amp magnetic-hydraulic circuit breaker made for the back of your helm panel. It protects a single low-draw circuit, resets by hand with a toggle, and carries both AC and DC ratings. If you've got a nav-light run, a bilge pump, an electronics feed, or an accessory circuit that needs its own dedicated protection, this is the kind of breaker that does the job and stays out of the way.

Here's what makes a magnetic-hydraulic breaker worth having on a boat. Instead of relying on a bimetal strip that bends with heat, it trips on a coil and a fluid-damped mechanism. That means the trip point stays honest whether you're running in August heat off Florida or firing up a cold panel in a Great Lakes spring. A thermal breaker can nuisance-trip when the engine room warms up, or ride through a fault when it's cold. This one doesn't play those games. The trip current is the trip current, right across the -40 to 185 degree Fahrenheit operating range.

The dual rating is the other reason boaters reach for this style. It's good to 277 volts AC and 80 volts DC, so the same breaker covers a 12-volt or 24-volt DC accessory circuit and an AC shore-power branch. Five amps is the sweet spot for a lot of small runs. Think LED nav lights, a VHF, a stereo head unit, a small pump, a USB charging panel, or an instrument feed. You size the breaker to protect the wire, and 5 amps pairs naturally with the lighter gauges those circuits use.

Installation is straightforward. It's a single-pole toggle panel mount, so it drops into any dash or electrical panel already cut for A-Series or C-Series magnetic-hydraulic breakers. If you're building a new panel or filling an empty position on an existing one, the cutout and spacing are standard. Wiring lands on No. 10-32 screw terminals, so you crimp a ring terminal, slip it over the stud, and torque it down. The toggle itself does double duty as an on/off switch, which is handy. Kill the circuit at the breaker when you're working on it, then flip it back up when you're done. After a fault clears, you reset the same way, just push the toggle back to on.

Build quality is where Egis earns its reputation. The mounting hardware is stainless steel and self-locking, so it won't back out under the constant pounding and vibration a boat sees underway. That matters more than it sounds. A loose breaker is a bad connection waiting to happen, and a bad connection in a marine electrical system is how you end up chasing gremlins at the worst possible time. The stainless hardware also shrugs off the salt air that eats plated steel alive.

On the protection side, this breaker is UL 1077 recognized as a supplementary protector, and it carries a high interrupt capacity, 5kA at 277 volts AC and 1.5kA at 80 volts DC. That interrupt number matters most on boats with large paralleled battery banks. When you've got a lot of amp-hours sitting there ready to dump into a dead short, you want a breaker that can open that fault safely instead of welding itself shut. This one is built for that job. It's also rated for 6,000 operating cycles at full current, so it'll outlast plenty of switching over the life of the boat.

Who's this for? Anybody wiring or re-wiring a panel who wants reliable, resettable protection on a single circuit without stocking a drawer full of fuses. Riggers, boatbuilders, and hands-on owners all use these. It ships in a retail pack with the mounting screws included, and Egis backs it with a 4-year warranty. For a small part that sits quietly behind the dash protecting gear you actually care about, that's the kind of coverage that tells you the company trusts its own build. Add it to a fresh panel, or keep a couple on the shelf for the next project. Either way, it's honest, dependable protection that installs in minutes.