Battery Isolator 275A – 2 Position with AFD Protect your power. Control your current. This heavy-duty 2-position battery isolator switch handles serious current and includes an AFD (Alternator Field Disconnect) to prevent damage to your alternator during isolation. Perfect for 4WDs, caravans, marine setups, and any high-demand electrical system. Key features: Continuous current: 275A Cranking current (10 sec): 1250A Surge current (5 min): 455A Voltage rating: Up to 48V DC AFD protection: Safely disconnects the alternator field before isolating the battery 2-position operation: ON / OFF for simple, reliable control Cable-friendly design: Removable side panels for versatile cable entry Built to last: Rugged construction for tough conditions Best for: Dual battery systems in 4WDs and caravans Marine electrical systems Off-grid or solar setups needing secure isolation Protecting alternators during power-off procedures