Professional Marine Circuit Protection - UL Recognized & USCG Compliant

Ensure reliable electrical protection for your marine systems with the Newmar 40ASB single pole circuit breaker, engineered specifically for marine applications and certified to meet the highest industry standards. This UL recognized and CSA listed circuit breaker provides dependable 40-amp protection for both AC and DC electrical systems while meeting stringent USCG requirements for marine circuit protection devices.

Professional Marine Certifications

Every Newmar circuit breaker undergoes rigorous testing and certification to ensure safe operation in demanding marine environments. The 40ASB features UL recognition and CSA listing for both AC and DC systems, providing confidence that your electrical protection meets or exceeds industry safety standards. USCG qualification ensures compliance with federal maritime safety regulations.

Advanced Magnetic-Hydraulic Technology

• Trip-Free Mechanism: Magnetic-hydraulic operation provides reliable protection against overcurrent conditions
• Precise Current Rating: 40-amp capacity handles high-draw marine equipment safely
• Voltage Compatibility: Rated for 32 VDC or 120 VAC applications
• Black Toggle Handle: Professional appearance with clear on/off indication
• Single Pole Design: Controls one hot conductor for standard marine applications
• Trip-Free Operation: Cannot be held in closed position during fault conditions

Technical Specifications

Universal Panel Compatibility

Designed for maximum compatibility, the 40ASB fits all Newmar electrical panels as well as most other marine electrical panel brands. This universal fit simplifies replacement and upgrade installations while maintaining professional appearance and reliable performance across different system configurations.

Professional Installation Features

• Rear Terminal Access: #10 screw terminals provide secure wire connections
• Standard Mounting: Compatible with industry-standard panel configurations
• Clear Identification: Current rating clearly marked for easy identification
• Professional Appearance: Black toggle handle matches marine electrical aesthetics
• Secure Mounting: Robust construction for reliable panel installation

Marine Application Excellence

The 40-amp rating makes this breaker ideal for protecting high-current marine equipment including inverters, battery chargers, windlasses, bow thrusters, and other power-hungry marine systems. The robust construction and marine-specific certifications ensure reliable protection in the harsh marine environment.

Important Voltage Rating Information

System Compatibility: This 40-amp breaker is rated for 32 VDC or 120 VAC systems. For 230 VAC applications, it's acceptable for line-to-line systems (where each leg is 115 VAC to neutral) but not rated for 230 VAC line-to-neutral systems. Always verify system voltage compatibility before installation.

Quality Assurance

Newmar's commitment to marine electrical excellence ensures every circuit breaker meets the demanding requirements of marine applications. From recreational boats to commercial vessels, these breakers provide the reliability and safety that marine professionals depend on for critical electrical protection.