Digital Voltage Sensitive Relay (VSR) with Start Isolation | Marine Toggle Switch Panels, Fuses, Circuit Breakers Manufacturer | YIS Marine

The BF453 Digital Voltage Sensitive Relay (DVSR) is designed to enhance battery management in modern marine, automotive, and RV applications. With features such as Start Isolation (SI), Auxiliary Battery Charging Extension (ABE), and Manual Override, this relay goes beyond standard Voltage Sensing Relays or Automatic Charging Relays (ACRs). Its robust design and smart functionality protect sensitive electronics, improve charging efficiency, and offer greater flexibility for specialized needs.

The BF453 Digital Voltage Sensitive Relay (VSR) automatically combines two batteries during charging, optimizing energy transfer, and isolates them when charging ceases, preserving power of unused start battery. It supports both 12V and 24V systems with auto-ranging input, making it compatible with a wide range of boat or caravan electrical systems. The dual-port sensing feature allows the relay to monitor voltage from either battery bank, allowing reversing charging to the start battery from alternative power source like solar panels or small wind turbine on the house battery side.

The BF453 VSR is built for durability, featuring a glass-fiber reinforced nylon enclosure that ensures high mechanical strength and thermal resistance. With an IP67 rating, it is completely dust-proof and completely water-tight, capable of withstanding temporary immersion in water up to 1 meter for 30 minutes. This level of protection ensures that the SI-VSR BF453 can operate reliably even in harsh outdoor or high-moisture conditions, such as in boats, off-road vehicles, and industrial equipment. Additionally, the ISO8846 / SAE J1171 ignition protection feature ensures its suitability for installation in environments prone to flammable gases, such as engine compartments.

Additional advanced features include the Auxiliary Battery Charging Extension (ABE) feature extends charging time for secondary batteries by reducing the open voltage threshold to 12.25V when idling, maximizing efficiency. And Start Isolation (SI) offers added protection during engine cranking by temporarily disconnecting house loads, safeguarding sensitive electronics. Over and under-voltage lockout features prevent accidental grounding or incorrect wiring, further enhancing system safety.

With a continuous current rating of 125 Amps and an intermittent rating of 140 Amps, this SI-VSR is designed for high-performance applications. The BF453 Digital Voltage Sensitive Relay (DVSR) operates efficiently across a wide voltage range, automatically detecting between 12V and 24V inputs, with minimal power consumption in standby and engaged modes.

To meet diverse branding and packaging needs, the BF453 is available with customizable packaging options, including bags, boxes, hanging boxes, and blister cards. We also offer custom printing options, allowing you to add your logo or branding to both the product and packaging. This customization ensures your product aligns with your brand identity while standing out in the market.

We accept small quantity orders with a minimum order quantity as low as 10 units, and flexible payment methods, including bank transfers, PayPal, and credit cards, the BF453 is an accessible solution for businesses of all sizes. For more information or to place an order, please contact our sales team. YIS Marine is a high-quality marines and boats Digital Voltage Sensitive Relay (VSR) with Start Isolation, Digital Voltage Sensitive Relay (VSR) with Start Isolation manufacturer from Taiwan, China since 1992. YIS Marine is a professional manufacturer devoted to providing high quality marine electrical and electronics products. By designing and manufacturing in-house and having quality control at Taiwan headquarter, we are able to offer high quality marine products at competitive prices.