Reliable 300 Amp circuit breaker for powering amplifiers, lighting systems, or onboard devices. Built for long-term resistance to saltwater, heat, and shock. Features 300 Amp marine circuit breaker for high-demand onboard components Durable waterproof enclosure protects from marine exposure Nickel-plated terminals resist oxidation and corrosion Compact and secure design with stable mounting Protects against current surges and short circuits Supports safe power delivery in salt fog and high humidity Technical Specs IP Certification: IP67 Power Rating A: 300