Blue Sea 7224 AC / DC Single Pole Magnetic World Circuit Breaker - 40 Amp

The Blue Sea 7224 AC / DC Single Pole Magnetic World Circuit Breaker — 40 Amp is the marine-grade electrical protection standard trusted by serious boaters and anglers worldwide. Whether you're running a center console, cruiser, or fishing vessel, this compact breaker safeguards your DC house bank, battery charger, and AC distribution panel against dangerous overcurrent conditions. Built for saltwater and freshwater environments alike, it meets every safety standard that matters: ABYC, UL 1077, TUV, CE, and CSA certification ensure your vessel's wiring and equipment stay protected in any condition.

This 40-amp magnetic breaker combines single-pole design with instantaneous trip technology, meaning it responds instantly to short circuits and fault conditions without nuisance tripping during normal operation. The magnetic mechanism — not thermal — delivers crisp, reliable protection ideal for high-current loads common in marine electrical systems: bow thrusters, windlasses, powerful trolling motors, and inverter banks. Weighing just 0.15 lbs and measuring a compact 2 x 1 x 4 inches, it fits snugly in tight panelboard spaces while handling both AC and DC circuits, eliminating the need for separate breakers and simplifying your electrical architecture.

Experienced skippers and professional boat electricians specify Blue Sea Systems breakers because they've proven themselves in rough seas, extended offshore passages, and demanding freshwater operations. If you're upgrading your vessel's electrical panel, replacing a worn breaker, or building a new system from scratch, this 40-amp breaker delivers the reliability that keeps you fishing, cruising, and exploring with confidence. Its dual-voltage capability makes it ideal for vessels with both AC inverters and DC house batteries, and its compact footprint works in standard marine panelboards throughout the industry.