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 8358 AC Rotary Switch Panel is a 2-pole panel rated at 30A for 230V AC systems, designed to select between up to three AC sources with an OFF position. It switches 230V AC inputs and provides a compact source selection solution where circuit protection is installed elsewhere. The panel includes a 9010 heavy duty industrial rated rotary switch and AC rotary panel labels, features reverse polarity and power available LED indicators, and uses heavy 1/8" aluminum 5052 alloy with a two-part polyurethane slate gray finish. Depth is 2.41 in (61.21 mm) and weight is 0.70 lb (0.32 kg).
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1-2 weeks delivery time The Blue Sea 8371 Water Resistant Circuit Breaker Panel is an 8-position black DC panel designed for flybridge and open cockpit installations, with an IP66 rated front protected against powerful water jets. It operates on 12V and 24V DC systems and features ON-OFF Contura switches with embedded ON indicator LEDs and push button reset-only circuit breakers with waterproof boots. The panel has a 90A cumulative rating, switch ratings of 20A at 12V DC and 15A at 24V DC, and includes mounting gasket, label set, breakers, boots, and switches. Dimensions are 4.25 × 9.37 × 3.25 in and listed weight is 1.75 lb (0.79 kg) / 1.70 lb (0.77 kg).
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$ 441.65
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1-2 weeks delivery time The Blue Sea 8372 Water Resistant Circuit Breaker Panel is a 4-position black DC panel designed for flybridge and open cockpit installations, with an IP66 rated front protected against powerful water jets. It operates on 12V and 24V DC systems and features ON-OFF Contura switches with embedded ON indicator LEDs and push button reset-only circuit breakers with waterproof boots. The panel has a 45A cumulative rating, switch ratings of 20A at 12V DC and 15A at 24V DC, and includes mounting gasket, label set, breakers, boots, and switches. Dimensions are 4.25 × 5.25 × 3.25 in and listed weight is 0.90 lb (0.41 kg) / 0.95 lb (0.43 kg).
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$ 258.65
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1-2 weeks delivery time The Blue Sea 8373 Water Resistant Circuit Breaker Panel is a 6-position black DC panel designed for flybridge and open cockpit installations, with an IP66 rated front protected against powerful water jets. It supports 12V and 24V DC systems and uses ON-OFF Contura switches with embedded ON indicator LEDs and push button reset-only circuit breakers with waterproof boots. The panel has a 45A cumulative rating, switch ratings of 20A at 12V DC and 15A at 24V DC, and includes breaker boots, 15A quick connect breakers, label set, and switches. Dimensions are 7.50 × 4.50 × 3.25 in and weight is 1.35 lb (0.61 kg).
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$ 385.48
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1-2 weeks delivery time The Blue Sea 8374 Water Resistant Circuit Breaker Panel is a 3-position black DC panel designed for flybridge and open cockpit installations, with an IP66 rated front protected against powerful water jets. It supports 12V and 24V DC systems and uses ON-OFF Contura switches with embedded ON indicator LEDs and push button reset-only circuit breakers with waterproof boots. The panel has a 45A cumulative rating, switch ratings of 20A at 12V DC and 15A at 24V DC, and includes breaker boots, 15A quick connect breakers, label set, and switches. Dimensions are 3.75 × 4.50 × 3.25 in and weight is 0.75 lb (0.34 kg).
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$ 215.12
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1-2 weeks delivery time The Blue Sea 8375 DC Panel is a 12-position panel for 12V and 24V DC systems with positive, negative, and grounding buses fully installed and pre-wired. It provides 100A maximum amperage and 100A per bus, with all circuit label positions backlit and ON-indicating LEDs installed in all circuit positions. Panels with analog meters are owner-upgradable to 24V using meters 8240 or 8243, and meter versions support a toggle switch for mounting up to three battery banks. Panel size is 4.50 × 14.75 in and weight is 5.84 lb (2.65 kg).
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1-2 weeks delivery time The Blue Sea 8379 DC Panel is a main plus 20-position distribution panel for 12V/24V DC systems with positive, negative, and grounding buses installed and fully pre-wired. It is rated to 100A and includes a 100A main breaker and a DC digital multi-function meter with alarm. All circuit label positions are backlit and each circuit has an ON-indicating LED. Dimensions are 7.50 × 14.75 × 4.00 in and weight is 8.40 lb (3.81 kg).
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1-2 weeks delivery time The Blue Sea 8380 DC Panel is a main plus 22-position distribution panel for 12V DC systems with white toggle breakers, fully pre-wired with positive, negative, and grounding buses installed. It is rated to 100A and includes a 100A main breaker, DC micro voltmeter (8–16V) and DC analog micro ammeter (2-face). All circuit label positions are backlit and each circuit position has an ON-indicating LED. Dimensions are 11.25 × 10.50 × 3.00 in and weight is 8.25 lb (3.74 kg).
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1-2 weeks delivery time The Blue Sea 8382 DC Panel is a main plus 35-position distribution panel for 12V/24V DC systems with white toggle breakers, fully pre-wired with positive, negative, and grounding buses installed. It is rated to 100A and includes a 100A main breaker and a DC digital multi-function meter with alarm. All circuit label positions are backlit and each circuit position has an ON-indicating LED. Dimensions are 11.25 × 14.75 × 4.00 in and weight is 10.80 lb (4.9 kg).
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1-2 weeks delivery time The Blue Sea 8403 DC Panel is a 13-position distribution panel for 12V/24V DC systems, fully pre-wired with positive, negative, and grounding buses installed and rated at 100A per bus. It includes a DC digital multi-function meter with alarm and ten 15A single-pole white toggle breakers. All circuit label positions are backlit and each circuit has an ON-indicating LED. Dimensions are 7.50 × 10.50 × 4.00 in and weight is 5.15 lb (2.34 kg).
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$ 1,361.04
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Blue Sea 8407 – AC Main + 11 Position Panel, 120V AC, Digital Multi-Function Meter, 30A Main Breaker
1-2 weeks delivery time The Blue Sea 8407 AC Panel is a 120V AC main plus 11-position distribution panel with fully pre-wired hot, neutral, and safety ground buses. It includes a 30A double-pole main breaker, eight 15A single-pole branch breakers, and an AC digital multi-function meter with alarm. The panel features a reverse polarity indicator, backlit circuit label positions, and ON-indicating LEDs for all circuits. Dimensions are 7.50 × 10.50 in and weight is 4.78 lb (2.17 kg).
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1-2 weeks delivery time The Blue Sea 8485 is a 120V AC distribution panel with AC main breaker and 11 branch circuit positions. It includes a red reverse polarity indicator LED, factory backlit circuit labels, and ON-status LEDs in all positions. The panel is fully pre-wired with hot, neutral, and safety ground buses. Dimensions: 11.25 × 5.25 in. Weight: 2.81 lb.
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1-2 weeks delivery time The Blue Sea 8509 is a European 230V AC distribution panel with AC main breaker and 3 branch positions. Fully pre-wired with hot, neutral, and safety ground buses. Includes reverse polarity LED, ON-status LEDs, backlit labels, AC voltmeter and AC ammeter with coil. Dimensions: 7.50 × 5.25 in. Weight: 4.06 lb.
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1-2 weeks delivery time The Blue Sea 8567 is a 230V AC distribution panel with dual source selection and 4 circuit positions for European electrical systems. It features double-pole main breakers with lockout slide preventing simultaneous source connection, pre-wired buses, reverse polarity indicator, and backlit labels. Dimensions: 7.50 × 5.25 in. Weight: 1.90 lb.
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1-2 weeks delivery time The Blue Sea 8580 is a 230V AC distribution panel with 13 circuit positions for European electrical systems. Includes pre-wired buses, ON indicator LEDs, and backlit labels. Dimensions: 11.25 × 5.25 in. Maximum panel amperage: 100A. Weight: 2.81 lb.
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1-2 weeks delivery time The Blue Sea 8599 is a horizontal 230V AC distribution panel with 2 source selector and 4 branch positions, featuring double-pole 16A main breakers with lockout slide, pre-wired buses, and LED indicators. Dimensions: 4.50 × 10.50 in. Weight: 1.90 lb.
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1-2 weeks delivery time The Blue Sea 9001e e-Series Selector Battery Switch is a 325A continuous 4-position battery selector for dual battery banks up to 32V DC. It supports 600A intermittent and 1200A cranking loads, accepts 4/0 AWG cables, and features make-before-break switching for uninterrupted power transfer. Stud size: 3/8"-16 (M10). Weight: 1.15 lb (0.52 kg).
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$ 92.04
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Blue Sea 9002e – e-Series Selector Battery Switch with AFD, 4 Position, 325A, for Dual Battery Banks
1-2 weeks delivery time The Blue Sea 9002e e-Series Selector Battery Switch with AFD is a 325A continuous 4-position battery selector for dual battery banks up to 32V DC. It supports 600A intermittent and 1200A cranking loads, includes alternator field disconnect protection, and accepts 4/0 AWG cables. Stud size: 3/8"-16 (M10). Weight: 1.15 lb (0.52 kg).
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$ 101.79
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1-2 weeks delivery time The Blue Sea 9004e e-Series Battery Switch is a 350A continuous single-circuit ON-OFF switch with integrated Alternator Field Disconnect for systems up to 48V DC. It supports 600A intermittent and 1200A starting loads, accepts 4/0 AWG cables, and uses 3/8"-16 (M10) studs. Cable clearance: 1.10" (27.94 mm). Weight: 0.95 lb (0.43 kg).
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$ 115.05
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1-2 weeks delivery time The Blue Sea 9009 is a 30A 2-pole AC rotary selector switch for 120V or 230V systems with OFF + 2 positions for selecting between two sources. Panel mount depth 1.91 in, cutout 1.89 × 1.89 in. Supports up to 600V AC and panels up to 4.00 mm thick.
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$ 260.52
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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.