Blue Sea Systems offers a comprehensive range of high-quality marine electrical products. Their products include fuse panels, terminal fuses, distribution blocks, battery management systems, switches, circuit protection, and more. These products are designed to enhance the safety, reliability, and efficiency of electrical systems on boats and yachts. Blue Sea Systems' fuse panels and distribution blocks help organize and protect wiring, while their battery management solutions ensure proper power distribution and control. Their switches, voltmeters, and other components provide easy monitoring and control of onboard electrical systems. Overall, Blue Sea Systems' products contribute to the smooth operation and safety of marine electrical systems.
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1-2 weeks delivery time The Blue Sea 7654 Mini Add-A-Battery Plus Kit 65A (Europe) is a complete small boat dual-battery management and charging system for alternators up to 65A. The kit includes an m-Series Mini Dual Circuit Plus™ Battery Switch (6011), a 3-stage 10A BatteryLink® charger (European version) with integrated 65A Automatic Charging Relay, LED charger remote, and a submersible temperature sensor. It supports alternator DC charging and AC dock charging, provides battery bank isolation and emergency combine function, and features IP66/IP67 protection ratings. CE certified.
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Our managers will contact you and clarify the terms of the order
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1-2 weeks delivery time Blue Sea ML Series 12 V bistable solenoid designed for high-load switching applications, using a magnetic latch system with silver alloy contacts and no standby power consumption, suitable for marine and industrial use.
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$ 331.35
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1-2 weeks delivery time The Blue Sea 7702 ML-RBS Remote Battery Switch is a 24V DC magnetic latching battery switch rated for 500A continuous current, designed for high-amperage switching under load from remote or manual control. It features a manual override knob with LOCKED OFF service position, bi-stable coil, and silver alloy contacts. The switch uses 3/8"-16 tin-plated copper studs with 7/8" (22.23 mm) length and supports cable size up to 2x (4/0). Electrical ratings include 500A continuous, 700A for 5 minutes, and 1000A starting (30 sec). Operating temperature range −10°C to +60°C. Weight: 2.09 lb (0.95 kg). ABYC C-7, CE marked, ignition protected, IP66, ISO 8846, SAE J1171.
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$ 386.72
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1-2 weeks delivery time Blue Sea ML Series 24 V bistable solenoid with manual control capability, fully sealed housing and silver alloy contacts, operating without continuous power draw and supporting high current switching up to 500 A continuous.
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$ 353.03
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1-2 weeks delivery time Blue Sea ML Series 24 V bistable solenoid with sealed construction and magnetic latch operation, designed for high-load switching with no standby power consumption and silver alloy contacts for reliable performance.
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$ 331.35
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1-2 weeks delivery time Blue Sea ML Series 12 V auto-release solenoid for remote switching applications, featuring bistable magnetic latch technology, sealed housing and silver alloy contacts for high current operation up to 500 A continuous.
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$ 408.28
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1-2 weeks delivery time The Blue Sea 7717 ML-RBS is a 24V DC auto-releasing magnetic latching remote battery switch rated 500A continuous with SPST switching and manual override with LOCKED OFF position. Control voltage 20.2–32.9V DC. Ratings: 500A continuous, 700A (5 min), 1000A (30 sec). Features 3/8"-16 tin-plated copper studs, 22.23 mm stud length, cable size up to 2×(4/0), and LED state output. Operating range −10°C to +60°C. Weight 2.07 lb (0.94 kg). ABYC C-7, CE, IP66, ISO 8846, SAE J1171.
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$ 447.57
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1-2 weeks delivery time Blue Sea ML Series 24 V auto-release solenoid designed for remote control circuits, using a bistable magnetic latch system with sealed construction and silver alloy contacts for reliable high-load switching up to 500 A continuous.
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$ 408.28
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1-2 weeks delivery time The Blue Sea 7720 AMI / MIDI Safety Fuse Block is an ignition-protected fuse holder rated up to 200A with 4/0 AWG (70 mm) cable and 32V DC. It features a sealed insulating cover with multi-direction wire access, M8 x 1.25 stud, and IP66 protection. Designed for marine gasoline and diesel installations. Torque: stud 120 in-lb, fuse screw 27 in-lb. Weight 0.15 lb (0.07 kg).
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$ 65.21
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1-2 weeks delivery time The Blue Sea 7721 AMG Safety Fuse Block is an ignition-protected fuse holder for AMG® fuses rated up to 300A with 4/0 AWG (70 mm) cable and 32V DC. It features a sealed insulating cover with multi-direction wire access, M8 × 1.25 stud connection, and IP66 protection for marine gasoline and diesel installations. Stud torque 120 in-lb. Weight 0.15 lb (0.07 kg).
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$ 65.21
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1-2 weeks delivery time The Blue Sea 7725 SafetyHub 100 Fuse Block is an ignition-protected 7-circuit fuse hub combining MIDI®/AMI® and ATO®/ATC® fused outputs with an integrated waterproof connector plug. Supports three MIDI/AMI fuse positions (30–200A) and four ATO/ATC positions (1–20A), with 280A combined maximum and operating voltage 12/24/32V. Features IP66 sealed cover, M8 studs, and consolidated high- and low-amp circuit distribution. Weight 3.20 lb (1.45 kg).
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$ 212.13
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1-2 weeks delivery time The Blue Sea 7765 L-Series Solenoid is a 12/24V DC continuous-duty SPST normally open solenoid rated 150A continuous for DC subpanels, thrusters, windlasses, inverters, and medium-amp loads. Control circuit 9–36V DC with 22 AWG tinned wires. Ratings: 150A continuous, 225A (5 min), 600A cranking (30 sec) with 2 AWG cable at 50°C. Contact voltage 320V DC. M8 studs, IP67 sealed, operating −40°C to +85°C. Weight 0.95 lb (0.43 kg).
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$ 283.79
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1-2 weeks delivery time The Blue Sea 7929 Contura II Switch is an SPST OFF-ON rocker switch with black Contura II actuator and integrated LED indicator. Rated 20A at 12V and 15A at 24V, with LED current 18 mA and LED life 100,000 hours. Operating range −40°C to +85°C, with internal and external gasket seals for panel mounting in Contura water-resistant panels. Weight 0.08–0.09 lb.
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$ 27.06
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1-2 weeks delivery time The Blue Sea 7930 Contura II Switch is an SPST rocker switch with OFF-(ON) momentary action, rated 20A at 12V and 15A at 24V for DC loads such as horns and windshield wipers. Black Contura II actuator, no LED, with internal and external gasket seals. Operating range −40°C to +85°C. Weight 0.08–0.09 lb.
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$ 30.73
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1-2 weeks delivery time The Blue Sea 7937 Contura II Switch is a DPDT rocker switch with (ON)-OFF-ON action, rated 20A at 12V and 15A at 24V, with single LED indicator (18 mA) and black Contura II actuator. Intended for DC circuits such as dual wipers. Operating range −40°C to +85°C with internal and external gasket seals. Weight 0.08–0.09 lb.
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$ 34.42
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1-2 weeks delivery time The Blue Sea 7938 Contura II Switch is a DPDT rocker switch with (ON)-OFF-(ON) momentary action, rated 20A at 12V and 15A at 24V for DC circuits such as power operated hatches. Black Contura II actuator, no LED, with internal and external gasket seals. Operating range −40°C to +85°C. Weight 0.08–0.09 lb.
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$ 34.42
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1-2 weeks delivery time The Blue Sea 7943 Contura II Switch is an SPDT rocker switch with ON-OFF-(ON) action for bilge pump circuits, rated 20A at 12V DC and 15A at 24V DC. Features black Contura II actuator and single LED indicator (18 mA) active in the momentary ON position. Operating range −40°C to +85°C with internal and external gasket seals. Weight 0.08 lb (0.04 kg).
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$ 27.89
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1-2 weeks delivery time The Blue Sea 7945 Contura III Switch is an SPDT rocker switch with (ON)-OFF-ON action for bilge pump circuits, rated 20A at 12V DC and 15A at 24V DC. Features black Contura III actuator and single LED indicator (18 mA) active in the momentary ON position. Operating range −40°C to +85°C with internal and external gasket seals. Weight 0.08 lb (0.04 kg).
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$ 35
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1-2 weeks delivery time The Blue Sea 8003 is a DC analog voltmeter with 8–16V measurement range and 2.75 in (69.85 mm) face size, using a simple 4-wire connection with meter power from the same circuit. Features backlit dial with separate 12V or 24V DC backlight connections. Backlight draw 16 mA @ 12V / 20 mA @ 24V. Meter current 1 mA at full scale. Weight 0.25 lb (0.11 kg).
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$ 72.78
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1-2 weeks delivery time The Blue Sea 8005 is a DC analog ammeter with 0–25A range and internal shunt, using a simple 4-wire connection and 2.75 in (69.85 mm) face size. Features backlit dial with separate 12V or 24V DC backlight connections. Backlight draw 16 mA @ 12V / 20 mA @ 24V. Meter current 1 mA at full scale. Weight 0.25–0.26 lb (0.11–0.12 kg).
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$ 77.68
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What are the key components and features of a Blue Sea Systems add-a-battery dual circuit system, and how does it contribute to effective battery management on boats?
A Blue Sea Systems add-a-battery dual circuit system is a comprehensive solution designed for efficient battery management on boats and yachts. It includes key components such as an Automatic Charging Relay (ACR), distribution blocks, switches, fuses, and terminal blocks. The system allows seamless switching between battery banks, prioritizing charging and isolating them when necessary. This setup optimizes power distribution, prevents battery drain, and ensures reliable starting power. The dual circuit system is a fundamental tool in maintaining electrical integrity and uninterrupted power supply on marine vessels.
By integrating a Blue Sea Battery Switch, users gain a reliable and safe method to manually control power flow between battery banks. This switch is built to marine-grade standards, ensuring long-term durability in harsh environments.
How does a Blue Sea Systems SI-ACR (Automatic Charging Relay) function, and what benefits does it offer for maintaining optimal battery charging and isolation?
The Blue Sea Systems SI-ACR (Automatic Charging Relay) is a key component in advanced Marine Wiring systems, designed to simplify and optimize the management of multiple battery banks on boats and yachts. It functions by automatically connecting battery banks during charging—when voltage exceeds a preset threshold—and isolating them when charging stops or voltage drops.
For a complete power distribution and protection solution, pair the SI-ACR with a robust Blue Sea Fuse Block.
What is the purpose of a Blue Sea Systems MRBF (Terminal Fuse) and how is it utilized in marine electrical systems to ensure safety and protection?
The Blue Sea Systems MRBF (Terminal Fuse) is a crucial component in marine electrical systems designed to provide protection against overcurrent situations. It safeguards electrical circuits and equipment by interrupting the flow of current in the event of a fault or excessive current draw. These fuses are engineered to handle high current loads and are typically installed in close proximity to batteries, making them a critical element in systems that require high reliability and safety.
Often used alongside Blue Sea Add a Battery systems, MRBF fuses ensure consistent protection and help maintain the integrity of the overall electrical setup. Their compact design and high interrupt capacity make them ideal for marine environments, where space is limited and safety is paramount.
To further enhance electrical safety and efficiency, integrating a Blue Sea Terminal Block provides organized and secure connections, optimizing the performance and reliability of marine electrical installations.