Blue Sea 9004e e-Series On-Off Battery Switch with AFD


Single circuit On/Off battery switch rated for 350A. Switches a single battery or power source to a single load. Includes AFD (alternator field disconnect) to protect the diodes in an alternator when the battery switch is inadvertently turned to the “OFF” position – Essentially deactivating the alternator output.

Switches a single battery to a single load group

  • Includes AFD (Alternator Field Disconnect)
  • Ignition protected—safe for installation aboard gasoline powered boats
  • Case design allows surface or rear panel mounting


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