Ultraflex 721 Battery Switch B1 B2 48V 350A

Product description:

The Ultraflex 721 Battery Switch B1 B2 Selector is a high-current battery switch designed for use in electrical installations of boats, yachts, and specialized vehicles where reliable power management from two independent batteries is required. The device allows selection of the power source – Battery 1 (B1), Battery 2 (B2), both simultaneously, or complete circuit disconnection, enabling safe disconnection of the system during servicing or extended downtime. The switch is panel-mounted, usually near the main power distributor, and its robust construction ensures resistance to harsh environmental conditions, including moisture, salinity, and vibrations typical of marine environments. The housing made of durable plastic guarantees electrical insulation and protection against accidental contact. The switch supports very high current intensities, allowing safe switching even during operation of high-current engines, starting systems, or large onboard consumers. The product complies with safety standards used in the marine and automotive industries, and its installation does not require specialized tools beyond basic electrician equipment. The Ultraflex 721 Battery Switch B1 B2 Selector is recommended for both new installations and upgrades of existing power systems where reliability and ease of use are critical.

Technical specifications:

• Continuous current: 350 A
• Intermittent current (short-term): 1000 A for 5 seconds
• Maximum voltage: 48 V DC
• Number of switching positions: 4 (OFF, B1, B2, B1+B2)
• Mounting type: panel
• Housing material: corrosion-resistant plastic
• Protection rating: IP56
• Dimensions: 135x135x75 mm
• Mounting hole diameter: 85 mm
• Weight: 0.7 kg
• Connectors: M10 brass screws
• Operating temperature range: -25°C to +60°C
• Compatibility: lead-acid, AGM, gel batteries
• Standards/certificates: CE, ISO 8846 (ignition protection)
• Warranty: 2 years
• Series: 721
• Manufacturer part number: 63143E

Product advantages:

• Enables safe switching between two independent batteries or their simultaneous use.
• Supports very high current intensities, ensuring reliability even in demanding installations.
• Robust, waterproof housing resistant to corrosion and mechanical damage.
• Simple and quick panel installation without the need for specialized tools.
• Compliance with marine and automotive safety standards.
• Clear switching positions minimize the risk of incorrect operation.
• Ability to completely disconnect power for service safety.
• Compatibility with various battery types used in the industry.
• Long mechanical and electrical lifespan confirmed by certificates.
• Protection against accidental ignition thanks to compliance with ISO 8846.
• High resistance to vibrations and environmental conditions typical for boats and vehicles.

Additional information:

• Manufacturer: Ultraflex
• SKU: 63143E
• Model/Series: 721
• Manufacturer part number: 63143E
• Compliance/Certificates: CE, ISO 8846
• Warranty: 2 years
• Country of origin: Italy
• Installation note: recommended installation in a dry, well-ventilated place with easy access for service