Best Selling
Blue Sea Systems Fuse MIDI 175A
The Fuse MIDI 175A features include:
- Fast-acting type fuses ideal for electronic devices
- Standard circuit protection device for automobiles and trucks
- Tin-plated connector blades for corrosion resistance
- Visible indication of blown condition
Blue Sea Systems Fuse MIDI 200A
The Fuse MIDI 200A features include:
- Fast-acting type fuses ideal for electronic devices
- Standard circuit protection device for automobiles and trucks
- Tin-plated connector blades for corrosion resistance
- Visible indication of blown condition
Blue Sea Systems Fuse MIDI 30A
The Fuse MIDI 30A features include:
- Fast-acting type fuses ideal for electronic devices
- Standard circuit protection device for automobiles and trucks
- Tin-plated connector blades for corrosion resistance
- Visible indication of blown condition
Blue Sea Systems Fuse MIDI 40A
The Fuse MIDI 40A features include:
- Fast-acting type fuses ideal for electronic devices
- Standard circuit protection device for automobiles and trucks
- Tin-plated connector blades for corrosion resistance
- Visible indication of blown condition
Blue Sea Systems Fuse MIDI 50A
The Fuse MIDI 50A features include:
- Fast-acting type fuses ideal for electronic devices
- Standard circuit protection device for automobiles and trucks
- Tin-plated connector blades for corrosion resistance
- Visible indication of blown condition
Blue Sea Systems Fuse MIDI 60A
The Fuse MIDI 60A features include:
- Fast-acting type fuses ideal for electronic devices
- Standard circuit protection device for automobiles and trucks
- Tin-plated connector blades for corrosion resistance
- Visible indication of blown condition
Blue Sea Systems Fuse MIDI 70A
The Fuse MIDI 70A features include:
- Fast-acting type fuses ideal for electronic devices
- Standard circuit protection device for automobiles and trucks
- Tin-plated connector blades for corrosion resistance
- Visible indication of blown condition
Blue Sea Systems Fuse MIDI 80A
The Fuse MIDI 80A features include:
- Fast-acting type fuses ideal for electronic devices
- Standard circuit protection device for automobiles and trucks
- Tin-plated connector blades for corrosion resistance
- Visible indication of blown condition
Blue Sea Systems Fuse Terminal 200A
The Fuse Terminal 200A requires the use of Terminal Fuse Blocks PN 10-5191 or PN 10-2151 - do not mount the fuse directly to the battery terminal. It's features include:
- Ignition protection - safe for installation aboard gasoline powered boats
- Clear window - visual indication of blown condition
- Interrupt rating satisfies ABYC requirements for DC Main circuit protection on large battery banks
- Color coded for each amperage
Blue Sea Systems Fuse Terminal 40A
The Fuse Terminal 40A requires the use of Terminal Fuse Blocks PN 10-5191 or PN 10-2151 - do not mount the fuse directly to the battery terminal. It's features include:
- Ignition protection - safe for installation aboard gasoline powered boats
- Clear window - visual indication of blown condition
- Interrupt rating satisfies ABYC requirements for DC Main circuit protection on large battery banks
- Color coded for each amperage
Blue Sea Systems Fuse Terminal 75A
The Fuse Terminal 75A requires the use of Terminal Fuse Blocks PN 10-5191 or PN 10-2151 - do not mount the fuse directly to the battery terminal. It's features include:
- Ignition protection - safe for installation aboard gasoline powered boats
- Clear window - visual indication of blown condition
- Interrupt rating satisfies ABYC requirements for DC Main circuit protection on large battery banks
- Color coded for each amperage
Blue Sea Systems MaxiBus 12 x 24 Common Bus
The MaxiBus 12 x 24 Common Bus is used to consolidate multiple wires or feed multiple circuits
- Insert molded stainless steel studs eliminate need for securing nut and allow high torquing for excellent electrical contact
- Raised bus provides easy access to multiple wires on a single screw or stud
- UL 94-V0 rated base material resists high heat
- Recessed mounting holes eliminate accidental shorts to aluminum and steel mounting surfaces
Blue Sea Systems MaxiBus 4 x 5/16 Stud Common
The MaxiBus 4 x 5/16 Stud Common is used to consolidate multiple wires or feed multiple circuits
- Insert molded stainless steel studs eliminate need for securing nut and allow high torquing for excellent electrical contact
- Raised bus provides easy access to multiple wires on a single screw or stud
- UL 94-V0 rated base material resists high heat
- Recessed mounting holes eliminate accidental shorts to aluminum and steel mounting surfaces
Blue Sea Systems MaxiBus 6 x 24 Stud Common
The MaxiBus 6 x 24 Stud Common is used to consolidate multiple wires or feed multiple circuits
- Insert molded stainless steel studs eliminate need for securing nut and allow high torquing for excellent electrical contact
- Raised bus provides easy access to multiple wires on a single screw or stud
- UL 94-V0 rated base material resists high heat
- Recessed mounting holes eliminate accidental shorts to aluminum and steel mounting surfaces
Blue Sea Systems MaxiBus 6 x 5/16 Stud Common
The MaxiBus 6 x 5/16 Stud Common is used to consolidate multiple wires or feed multiple circuits
- Insert molded stainless steel studs eliminate need for securing nut and allow high torquing for excellent electrical contact
- Raised bus provides easy access to multiple wires on a single screw or stud
- UL 94-V0 rated base material resists high heat
- Recessed mounting holes eliminate accidental shorts to aluminum and steel mounting surfaces
Blue Sea Systems MiniBus 4 x # 32 CommonBus w/cvr
The MiniBus 4 x # 32 CommonBus w/cvr is great for limited space applications
Blue Sea Systems MiniBus 4 x # 32 Stud Common
The MiniBus 4 x # 32 Stud Common is great for limited space applications
Blue Sea Systems MiniBus 5 x #8-32 CommonBus w/cvr
The MiniBus 5 x #8-32 CommonBus w/cvr is great for limited space applications
Blue Sea Systems MiniBus 5 x #8-32 Stud Common Bus
The MiniBus 5 x #8-32 Stud Common Bus is great for limited space applications
Blue Sea Systems PowerBar 4x 3/8-16 Stud Terminal
The Blue Sea PowerBar 600 Ampere BusBar features include:
- 3/8"-16 Studs
- 4 Terminal Studs
- Base material of UL 94-V0 Rated, Glass Reinforced Thermoplastics
- Continuous rating of 545A AC and 600A DC
- Maximum voltage of 300V AC and 48V DC
Blue Sea Systems PowerBar 8 x 3/8-16 Stud Terminal
The Blue Sea PowerBar 600 Ampere BusBar features include:
- 3/8"-16 Studs
- 8 Terminal Studs
- Base material of UL 94-V0 Rated, Glass Reinforced Thermoplastics
- Continuous rating of 545A AC and 600A DC
- Maximum voltage of 300V AC and 48V DC
Blue Sea Systems PowerPost 1/4in
The PowerPost 1/4in with insulated single stainless steel stud terminates multiple large conductors. It's features include:
- Connects high amperage cables securely
- Stud dimensions: 1/4" x 1-1/16"
- Base Material is PBT UL94 V0
Blue Sea Systems PowerPost 3/8in
The PowerPost 3/8in with insulated single stainless steel stud terminates multiple large conductors. It's features include:
- Connects high amperage cables securely
- Stud dimensions: 3/8" x 7/8"
- Base Material is PBT UL94 V0
Blue Sea Systems PowerPost 5/16in
The PowerPost 5/16in with insulated single stainless steel stud terminates multiple large conductors. It's features include:
- Connects high amperage cables securely
- Stud dimensions: 5/16" x 7/8"
- Base Material is PBT UL94 V0
Blue Sea Systems PowerPost Dual 2 x 3/8in Studs w/ insulators
The PowerPost Dual 2 x 3/8in Studs w/ insulators provides a termination point for extending the length of outboard harnesses or other conductors
- Designed for connecting high amp conductors
- Includes one black and one red insulator
Blue Sea Systems PowerPost Dual 2 x 5/16in Studs w/ insulators
The PowerPost Dual 2 x 5/16in Studs w/ insulators provides a termination point for extending the length of outboard harnesses or other conductors
- Designed for connecting high amp conductors
- Includes one black and one red insulator
Blue Sea Systems PowerPost Mini # 32
The PowerPost Mini # 32 with insulated single stainless steel stud terminates multiple large conductors. It's features include:
- Connects high amperage cables securely
- Stud dimensions: #10-32 x 5/8"
- Base Material is PBT UL94 V0
Blue Sea Systems PowerPost Mini 1/4in
The PowerPost Mini 1/4in with insulated single stainless steel stud terminates multiple large conductors. It's features include:
- Connects high amperage cables securely
- Stud dimensions: 1/4" x 3/4"
- Base Material is PBT UL94 V0
Blue Sea Systems Single Circuit ON-OFF with Locking Key - Black
The Single Circuit ON-OFF with Locking Key - Black provides 300 Amps continuous rating for outboards and small gasoline or diesel engines. It also includes:
- Tin-plated copper studs for maximum conductivity and corrosion resistance
- Studs accept 3/8" (M10) ring terminals
- 7/8" (22 mm) stud length accepts multiple cable terminals
- Blue Sea Systems one-piece terminal stud design never loosens over time
- One-piece stainless flange nuts ensure safe and secure connections
- Isolating cover protects rear contacts
- Breakout tabs allow wire access in any direction
Blue Sea Systems Solenoid Add A Battery
The Solenoid ADD-A-BATTERY is as simple to operate as an ON-OFF switch, yet effectively manages the switching and charging of two batteries from a single charge source
The Add-A-Battery includes a Dual Circuit Plus Battery Switch and an Automatic Charging Relay. These components simplify switching and automate charging, so that all you have to do is turn the battery switch ON when you arrive and OFF when you leave.
Blue Sea Systems Solenoid ML 500A 12V ACR w/manCtrl
The Solenoid ML 500A 12V ACR w/manCtrl 500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine. It also includes:
- Manual control switch provides an added level of safety allowing control with or without power, and offering LOCK OFF capability for servicing
- Includes ML-Series Remote Control Contura Switch PN 2146
- Automatically manages the charging of two large battery banks
- Allows paralleling of battery banks for emergency starting
- 500 Ampere continuous rating to support high-output alternators
- Magnetic Latch (ML) - ACR draws very low current (<40mA to monitor terminal voltage) in the "ON" or "OFF" states, and draws moderate current for very short time when changing state
- Dual sensing - senses charge on both battery banks
- Start Isolation (SI) - can be configured for temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics
- Engine Isolation (EI) - can be configured for isolation of two engines while both are running to protect engine electronics and maximize alternator output
- Senses charging on two battery banks
- LED output to remotely indicate when batteries are combined, isolated, in voltage lockout, or in Start or Engine isolation
- 3/8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
- 7/8" (22mm) stud length accepts multiple cable terminals
- Silver alloy contacts provide high reliability for switching live loads
- Label recesses for circuit identification
Blue Sea Systems Solenoid ML 500A 12V RBS w/ Man Ctrl 2 (inc 10-2145 Switch)
The Solenoid ML 500A 12V RBS w/ Man Ctrl 2 (inc 10-2145 Switch) 500 Amp magnetic latching switch provides high amperage switching under load, manually or from remote locations. It also includes:
- Manual override knob provides an added level of safety allowing control with or without power and offering LOCKED OFF capability for servicing
- LED output to remotely indicate switch state - requires optional LED
- 8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
- 8" (22 mm) stud length accepts multiple cable terminals
- Label recesses for circuit identification
- Silver alloy contacts provide high reliability for switching live loads
Auto Releasing ML-Series Remote Battery Switch with SPST Switching Provides 500A switching and features of current ML Remote Battery Switches, but can be controlled with SPST or SPDT switch for applications where a normally open relay is desired
Blue Sea Systems Solenoid ML 500A 12V RBS w/manCtrl
The Solenoid ML 500A 12V RBS w/manCtrl 500 Amp magnetic latching switch provides high amperage switching under load, manually or from remote locations. It also includes:
- Manual override knob provides an added level of safety allowing control with or without power and offering LOCKED OFF capability for servicing
- LED output to remotely indicate switch state - requires optional LED
- 8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
- 8" (22 mm) stud length accepts multiple cable terminals
- Label recesses for circuit identification
- Silver alloy contacts provide high reliability for switching live loads
Blue Sea Systems Solenoid ML 500A 24V ACR
The Solenoid ML 500A 24V ACR 500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine. It also includes:
- ML-Series Remote Control Contura Switch PN 2146
- Automatically manages the charging of two large battery banks
- Allows paralleling of battery banks for emergency starting
- 500 Ampere continuous rating to support high-output alternators
- Magnetic Latch (ML) - ACR draws very low current (40mA to monitor terminal voltage) in the "ON" or "OFF" states, and draws moderate current for very short time when changing state
- Dual sensing - senses charge on both battery banks
- Start Isolation (SI) - can be configured for temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics
- Engine Isolation (EI) - can be configured for isolation of two engines while both are running to protect engine electronics and maximize alternator output
- Senses charging on two battery banks
- LED output to remotely indicate when batteries are combined, isolated, in voltage lockout, or in Start or Engine isolation
- 3/8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
- 7/8" (22mm) stud length accepts multiple cable terminals
- Silver alloy contacts provide high reliability for switching live loads
- Label recesses for circuit identification
Blue Sea Systems Solenoid ML 500A 24V ACR w/manCtrl
The Solenoid ML 500A 24V ACR w/manCtrl 500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine. It also includes:
- Manual control switch provides an added level of safety allowing control with or without power, and offering LOCK OFF capability for servicing
- Includes ML-Series Remote Control Contura Switch PN 2146
- Automatically manages the charging of two large battery banks
- Allows paralleling of battery banks for emergency starting
- 500 Ampere continuous rating to support high-output alternators
- Magnetic Latch (ML) - ACR draws very low current (<40mA to monitor terminal voltage) in the "ON" or "OFF" states, and draws moderate current for very short time when changing state
- Dual sensing - senses charge on both battery banks
- Start Isolation (SI) - can be configured for temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics
- Engine Isolation (EI) - can be configured for isolation of two engines while both are running to protect engine electronics and maximize alternator output
- Senses charging on two battery banks
- LED output to remotely indicate when batteries are combined, isolated, in voltage lockout, or in Start or Engine isolation
- 3/8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
- 7/8" (22mm) stud length accepts multiple cable terminals
- Silver alloy contacts provide high reliability for switching live loads
- Label recesses for circuit identification
Blue Sea Systems Solenoid ML 500A 24V RBS w/ Man Ctrl Auto-Release
The Solenoid ML 500A 24V RBS w/ Man Ctrl Auto-Release 500 Amp magnetic latching switch provides high amperage switching under load, manually or from remote locations. It also includes:
- Manual override knob provides an added level of safety allowing control with or without power and offering LOCKED OFF capability for servicing
- LED output to remotely indicate switch state - requires optional LED
- 8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
- 8" (22 mm) stud length accepts multiple cable terminals
- Label recesses for circuit identification
- Silver alloy contacts provide high reliability for switching live loads
Auto Releasing ML-Series Remote Battery Switch with SPST Switching Provides 500A switching and features of current ML Remote Battery Switches, but can be controlled with SPST or SPDT switch for applications where a normally open relay is desired
Blue Sea Systems Solenoid ML 500A 24V RBS w/manCont
The Solenoid ML 500A 24V RBS w/manCont 500 Amp magnetic latching switch provides high amperage switching under load, manually or from remote locations. It also includes:
- Manual override knob provides an added level of safety allowing control with or without power and offering LOCKED OFF capability for servicing
- LED output to remotely indicate switch state - requires optional LED
- 8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
- 8" (22 mm) stud length accepts multiple cable terminals
- Label recesses for circuit identification
- Silver alloy contacts provide high reliability for switching live loads
Blue Sea Systems Solenoid SI Series 120A 12/24V ACR
The Solenoid SI Series 120A 12/24V ACR Automatically combines batteries during charging, isolates batteries when discharging and when starting engines. It also:
- Protects sensitive electronics by temporary isolation of house loads from engine circuit during engine cranking
- Designed for 12 or 24 volt systems
- 12/24 volt auto ranging voltage input
- Hermetically sealed contacts/vaporproof
- Ignition protected - safe for installation aboard gasoline powered boats
- Supports high-output alternators up to 120 Amperes
- Dual sensing
Optional Features
- Start Isolation allows temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics from sags and spikes
- Remote LED remotely indicates ACR states - requires optional LED
Blue Sea Systems SPECIAL Fuse AGC 10A (pack of 5)
The SPECIAL Fuse AGC 10A (pack of 5) is for use with Blue Sea Systems' ST Glass Fuse Blocks and AGC or MDL fuse holders. AGC and MDL fuses are typically used in DC systems up to 32V DC where AGC fuses to 10A are rated for use in AC at 125V AC and to a maximum 250V AC. it is designed with a visible indication of a blown condition.
Blue Sea Systems SPECIAL Fuse AGC 15A (pack of 5)
The SPECIAL Fuse AGC 15A (pack of 5) is for use with Blue Sea Systems' ST Glass Fuse Blocks and AGC or MDL fuse holders. AGC and MDL fuses are typically used in DC systems up to 32V DC where AGC fuses to 10A are rated for use in AC at 125V AC and to a maximum 250V AC. it is designed with a visible indication of a blown condition.
Blue Sea Systems SPECIAL Fuse ATM 10A
The SPECIAL Fuse ATM 10A is color-coded for easy amperage identification
Blue Sea Systems ST Blade Battery Terminal Mount Fuse Block Kit
The ST Blade Battery Terminal Mount Fuse Block Kit easily allows you to add 4 fused circuits to the terminal of a battery and provides power to new accessories in your boat or vehicle. It also includes:
- Mounts on the battery terminal stud
- Screw terminals for securing wires
- Accepts small format circuit labels
- Insulating cover meets ABYC/USCG insulation requirements
- Ignition Protected - meets ISO 8846 and SAE J1171 for use in a gasoline engine compartment
Blue Sea Systems Switch Battery e DualCirc
The Switch Battery e DualCirc Simultaneously switches two isolated battery banks. It also includes:
- Ignition protection - safe for installation aboard gasoline powered boats
- Case design allows surface or rear panel mounting
Blue Sea Systems Switch Battery e DualCircPlus
The Switch Battery e DualCircPlus Simultaneously switches two isolated battery banks or combines battery banks to all loads. It also includes:
- Make-before-break contact design allows switching without power interruption
- Ignition protection - safe for installation aboard gasoline powered boats
- Case design allows surface or rear panel mounting
Blue Sea Systems Switch Battery e ON/OFF
The Switch Battery e ON/OFF Switches a single battery to a single load group. It also includes:
- Ignition protection - safe for installation aboard gasoline powered boats
- Case design allows surface or rear panel mounting
Blue Sea Systems Switch Battery e ON/OFF w/AFD
The Switch Battery e ON/OFF w/AFD Switches a single battery to a single load group. It also includes:
- Includes AFD (Alternator Field Disconnect)
- Ignition protected - safe for installation aboard gasoline powered boats
- Case design allows surface or rear panel mounting
Blue Sea Systems Switch Battery e Selector
The Switch Battery e Selector switches isolated battery banks to all loads or combines battery banks to all loads. It also includes:
- Make-before-break contact design allows switching between battery banks without power interruption
- Ignition protected - safe for installation aboard gasoline powered boats
- Case design allows surface or rear panel mounting
Blue Sea Systems Switch Battery e Selector w/AFD
The Switch Battery e Selector w/AFD Switches isolated battery banks to all loads or combines battery banks to all loads. It also includes:
- AFD (Alternator Field Disconnect)
- Make-before-break contact design allows switching between battery banks without power interruption
- Ignition protected - safe for installation aboard gasoline powered boats
- Case design allows surface or rear panel mounting



































































