Blue Sea 78402B Master Disconnect On/Off Switch, 350A

This master disconnect switch gives you a single, reliable point to fully isolate your battery bank — useful for maintenance, storage, or emergency shutdown. Its case supports either surface or rear panel mounting, so it fits a variety of installation layouts.

Key Specs:

• Continuous Rating: 350A
• Intermittent Rating: 600A (5 minutes)
• Max Voltage: 48V DC
• Cable Size: 4/0 AWG (120mm²) to meet ratings
• Switch Positions: 2 (On/Off)
• Mounting: Surface or rear panel

A solid mid-size disconnect option for battery banks that don't need the full 600A rating of Blue Sea's larger switch.