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Switch Panels & Switches

Battery Isolator Switch – 2 Position ON/OFF 275A 12–48V

SKU: SA-530781

$48.85
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The 530781 Battery Isolator Switch provides reliable battery isolation for boats, trailers, caravans and automotive electrical systems. Featuring a heavy-duty plastic housing, brass terminals and a removable rotary knob, this compact ON/OFF switch is designed for 12–48V electrical installations. Its 275A continuous current rating, surface-mount design and removable side panels make installation straightforward while providing convenient battery disconnection for maintenance, storage and electrical safety.

Key benefits

Key Benefits

  • - Heavy-duty 275A continuous current capacity.
  • - Simple 2-position ON/OFF operation.
  • - Suitable for 12V, 24V and 48V electrical systems.
  • - Removable rotary knob for added security.
  • - Durable plastic housing with brass terminals.
  • - Removable side panels for flexible cable routing.
  • - Compact surface-mount design.
  • - Suitable for marine and automotive applications.

Specifications & Dimensions

  • - Part Number: 530781
  • - Product Type: Battery isolator switch
  • - Switch Positions: 2 – ON/OFF
  • - Operating Voltage: 12–48V DC
  • - Continuous Current: 275A at 12V
  • - Intermittent Current: 450A for 5 minutes at 12V
  • - Cranking Current: 1250A for 10 seconds at 12V
  • - Length: 68mm (2.68")
  • - Width: 68mm (2.68")
  • - Depth: 75mm (2.95")
  • - Terminal Stud Size: M10
  • - Mounting Type: Surface mount
  • - Terminal Material: Brass
  • - Housing Material: Heavy-duty plastic
  • - Certification: CE certified

Compatible Applications

  • - Recreational and fishing boats
  • - Outboard-powered vessels
  • - Inboard-powered vessels
  • - Marine dual-battery installations requiring individual isolation
  • - Caravans and camper trailers
  • - 4WD and automotive electrical systems
  • - Auxiliary battery installations

Important Fitment Information

  • - Confirm electrical system voltage and current requirements before installation.
  • - Ensure battery cables and terminals are correctly sized.
  • - Suitable for surface mounting with adequate cable clearance.
  • - Do not switch to OFF while the engine is running.
  • - This is a battery isolation switch, not an automatic dual-battery charging system.

Signs the Battery Isolator Switch Needs Replacing

  • - Intermittent electrical power.
  • - Excessive heat around the switch or terminals.
  • - Corroded or damaged terminals.
  • - Loose or difficult-to-turn rotary knob.
  • - Visible cracking or deterioration of the housing.
  • - Failure to disconnect or reconnect battery power reliably.

Shipping

Ships Australia-wide