Blue Sea Systems 7443 UL-489 Circuit Breaker 20A DC Flat Rocker

The Blue Sea Systems 7443 is a UL-489 certified 20-amp DC circuit breaker designed for marine and military applications where stringent safety standards are required. This single-pole breaker features a flat rocker actuator for easy panel mounting and operation, making it ideal for Navy, Army, Coast Guard vessels, and other craft covered under CFR 46 regulations.

Key Features:

• UL-489 listed magnetic hydraulic circuit breaker with trip-free operation
• 20-amp current rating for DC circuits up to 80 volts
• Flat rocker actuator style for clean, professional panel installation
• High interrupt capacity of 10,000 amps for robust circuit protection
• Tin-plated brass terminals with #10-32 screw connections resist corrosion in marine environments
• Single pole design for straightforward wiring and space-efficient mounting

This trip-free circuit breaker cannot be held in the closed position during an overload condition, ensuring reliable protection for critical electrical systems. The magnetic hydraulic design provides precise, temperature-compensated protection that won't be affected by ambient heat. Ideal for protecting DC electrical panels, battery systems, and power distribution on vessels requiring UL-489 certification.