Blue Sea 78403B Heavy Duty Master Disconnect On/Off Switch, 600A

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

Key Specs:

• Continuous Rating: 600A
• Intermittent Rating: 900A (5 minutes)
• Max Voltage: 32V DC
• Cable Size: Accepts two 4/0 AWG (95mm²) battery cables
• Switch Positions: 2 (On/Off)
• Mounting: Surface or rear panel

Rated for the highest-current systems we carry — a good match for large battery banks with heavy inverter draw.