Sierra BS11010 Battery Switch ON-OFF with AFD Alternator Field Disconnect

The Sierra BS11010 Battery Switch is a heavy-duty marine battery disconnect switch featuring integrated Alternator Field Disconnect (AFD) technology. This essential marine electrical component allows you to safely isolate your battery system when the vessel is not in use, while the AFD feature protects your alternator by automatically disconnecting the field circuit when the switch is turned off, preventing dangerous voltage spikes.

Key Features:

• ON-OFF switching with integrated Alternator Field Disconnect (AFD) protection
• Maximum voltage rating of 48VDC for versatile applications
• Tin-plated copper battery studs resist corrosion in marine environments
• Accepts large 4/0 AWG cable for high-amperage applications
• Ergonomic removable knob design provides added security and theft deterrence
• Robust glass fiber reinforced nylon enclosure withstands harsh marine conditions
• Removable access windows on all four sides allow unobstructed wiring access
• Flexible installation with surface mount or panel mount options
• Stud torque specification: 120 lb-in for secure connections

This battery switch is ideal for boats, RVs, and other marine or recreational vehicle applications where reliable battery isolation and alternator protection are essential. The removable knob feature adds an extra layer of security when leaving your vessel or vehicle unattended.