Switches > Battery-Switches > Blue-Sea-Systems-Battery-Switches

Blue Sea Systems Battery Switches - e-Series - Single Circuit

These single circuit Blue Sea Systems battery switches offer 350 amps for inboard gasoline or diesel engines. These switches switch a single battery to a single load group and feature tin-plated copper studs for maximum conductivity and corrosion resistance. Accepts up to 4/0 AWG battery cables. The studs accept 3/8" (M10) ring terminals and have a 7/8" stud length (22 mm) that can accept 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. Fits most Perko and Guest low amperage battery switch hole patterns. Case design allows surface or rear panel mounting options. Tactile indicator conveys knob position by feel. 5439 includes Alternator Field Disconnect (AFD) which protects the diodes in the alternator in the event of the switch being switched to the OFF position while the engine is running. If the AFD is not used to protect the alternator, an LED can be connected to the AFD terminals to indicate when the battery switch is in any position but OFF.


  • ON-OFF Circuit
  • Cranking Rating (10 Sec.) 2,000A; Cranking Rating (1 Min.) 1,000A
  • Intermittent Rating (5 Min.) 600A
  • Continuous Rating: 350A @ 48V DC Maximum
  • CE marked, ISO 8846, UL listed - UL1107 electrical power switches. Meets ABYC requirements. Meets UL 1500 and SAE J1171 external ignition protection requirements.
  • IP66
Item Description Price Qty in
Package
In Stock Add to Cart
5438 Single Circuit ON-OFF Battery Switch, Red, 350A (BSS 9003e) (1 MIN) 47.87 1 EA
5439 Single Circuit ON-OFF Battery Switch with Alternator Field Disconnect, Red, 350A (BSS 9004e) (1 MIN) 67.44 1 EA

Blue Sea Systems Battery Switches - e-Series - Dual Circuit

These Blue Sea Systems dual circuit battery switches offer 350 amps for inboard gasoline or diesel engines. These switches simultaneously switch two isolated battery banks or circuits. These may be used to switch the positive and negative conductors for required applications. They feature tin-plated copper studs for maximum conductivity and corrosion resistance. The studs accept 3/8" (M10) ring terminals and have a 7/8" stud length (22 mm) that can accept 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. Fits most Perko and Guest low amperage battery switch hole patterns. Case design allows surface or rear panel mounting options.


  • ON-OFF Circuit
  • Cranking Rating (10 Sec.) 1,000A; Cranking Rating (1 Min.) 750A
  • Intermittent Rating (5 Min.) 525A
  • Continuous Rating: 350A @ 32V DC Maximum
  • CE marked, ISO 8846, UL listed - UL1107 electrical power switches. Meets ABYC requirements. Meets UL 1500 and SAE J1171 external ignition protection requirements.
  • IP66
Item Description Price Qty in
Package
In Stock Add to Cart
5434 Dual Circuit Battery Switch, Red, 350A (BSS 5510e) (1 MIN) 65.38 1 EA

Blue Sea Systems Battery Switches - e-Series - Dual Circuit Plus

These Blue Sea Systems dual circuit plus battery switches offer 350 amps for inboard gasoline or diesel engines. These switches simultaneously switch two isolated battery banks or combines battery banks to all loads. They CANNOT be used to switch positive and negative conductors because of the combine feature. They feature tin-plated copper studs for maximum conductivity and corrosion resistance. The studs accept 3/8" (M10) ring terminals and have a 7/8" stud length (22 mm) that can accept 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. Fits most Perko and Guest low amperage battery switch hole patterns. Case design allows surface or rear panel mounting options.


  • ON-OFF Circuit
  • Cranking Rating (10 Sec.) 1,000A; Cranking Rating (1 Min.) 750A
  • Intermittent Rating (5 Min.) 525A
  • Continuous Rating: 350A @ 32V DC Maximum
  • CE marked, ISO 8846, UL listed - UL1107 electrical power switches. Meets ABYC requirements. Meets UL 1500 and SAE J1171 external ignition protection requirements.
  • IP66
Item Description Price Qty in
Package
In Stock Add to Cart
5435 Dual Circuit Plus Battery Switch, Red, 350A (BSS 5511e) (1 MIN) 62.70 1 EA

Blue Sea Systems Battery Switches - e-Series - 3 Position

This three position Blue Sea Systems battery switch offers 350 amps for inboard gasoline or diesel engines. This switch switches isolated battery banks to all loads and features tin-plated copper studs for maximum conductivity and corrosion resistance. The studs accept 3/8" (M10) ring terminals and have a 7/8" stud length (22 mm) that can accept 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. Fits most Perko and Guest low amperage battery switch hole patterns. Case design allows surface or rear panel mounting options. Includes Alternator Field Disconnect (AFD) which protects the diodes in the alternator in the event of the switch being switched to the OFF position while the engine is running. If the AFD is not used to protect the alternator, an LED can be connected to the AFD terminals to indicate when the battery switch is in any position but OFF.


  • 1-OFF-2
  • Cranking Rating (10 Sec.) 2,000A; Cranking Rating (1 Min.) 1,000A
  • Intermittent Rating (5 Min.) 600A
  • Continuous Rating: 350A @ 32V DC Maximum
  • CE marked, ISO 8846, UL listed - UL1107 electrical power switches. Meets ABYC requirements. Meets UL 1500 and SAE J1171 external ignition protection requirements.
  • IP66
Item Description Price Qty in
Package
In Stock Add to Cart
5440 Selector 3 Position Battery Switch with Alternator Field Disconnect, Red, 350A (BSS 11001) (1 MIN) 54.41 1 EA

Blue Sea Systems Battery Switches - e-Series - 4 Position

These four position Blue Sea Systems battery switches offer 350 amps for inboard gasoline or diesel engines. These switches switch isolated battery banks to all loads or combines battery banks to all loads and feature tin-plated copper studs for maximum conductivity and corrosion resistance. The studs accept 3/8" (M10) ring terminals and have a 7/8" stud length (22 mm) that can accept multiple cable terminals. Accepts up to 4/0 AWG battery cables. Blue Sea Systems one-piece terminal stud design never loosens over time. One-piece stainless flange nuts ensure safe and secure connections. Fits most Perko and Guest low amperage battery switch hole patterns. Case design allows surface or rear panel mounting options. Part number 5437 includes Alternator Field Disconnect (AFD) which protects the diodes in the alternator in the event of the switch being switched to the OFF position while the engine is running. If the AFD is not used to protect the alternator, an LED can be connected to the AFD terminals to indicate when the battery switch is in any position but OFF.


  • OFF-1-BOTH-2
  • Cranking Rating (10 Sec.) 2,000A; Cranking Rating (1 Min.) 1,000A
  • Intermittent Rating (5 Min.) 600A
  • Continuous Rating: 350A @ 32V DC Maximum
  • CE marked, ISO 8846, UL listed - UL1107 electrical power switches. Meets ABYC requirements. Meets UL 1500 and SAE J1171 external ignition protection requirements.
  • IP66
Item Description Price Qty in
Package
In Stock Add to Cart
5436 Selector 4 Position Battery Switch, Red, 350A (BSS 9001e) (1 MIN) 51.78 1 EA
5437 Selector 4 Position Battery Switch with Alternator Field Disconnect, Red, 350A (BSS 9002e) (1 MIN) 57.14 1 EA