Blue Sea Main Battery Switch ON-OFF-EMERGY-BOTH Red M Series

Blue Sea Main Battery Switch ON-OFF-EMERGENCY-BOTH Red M Series is a versatile double-pole main battery switch that allows you to manage two separate battery banks and combine them when needed for emergency operation. It is an excellent solution for boats with separate start and house batteries where safe and reliable power management is essential in all situations. Looking for a main battery switch that offers both secure battery isolation and the ability to combine banks in an emergency? The Blue Sea Mini Dual Circuit Plus™ integrates these functions into a compact and highly reliable switch. In an emergency situation, the battery banks can be quickly combined to ensure engine starting or continued power supply. Manage two battery banks with a single switch The switch allows safe separation and control of two battery banks during normal operation. This helps protect the starting battery from discharge and ensures there is always sufficient power available to start the engine. When needed, the EMERGENCY/BOTH function connects both battery banks so their combined capacity can be used. Seamless switching between battery banks The “make before break” function allows switching between battery banks without interrupting power. This prevents system shutdowns and protects sensitive marine electronics. This is especially valuable on boats equipped with chartplotters, navigation systems, and other electronics that require continuous power supply. Designed for high currents and demanding marine use The M Series switch handles up to 300 A continuous load and high cranking currents, making it suitable for powerful marine engines and complex electrical systems. Its compact design saves space while maintaining the reliability and durability Blue Sea Systems is known for. Features: • Mini Dual Circuit Plus™ main battery switch • ON-OFF-EMERGENCY/BOTH functions • Double-pole construction • Controls two separate battery banks • Emergency battery combining function • “Make before break” switching to prevent power interruption • Suitable for start and house battery systems • Compact M Series design • Clearly visible red control knob Technical Specifications: • Switch type: Double-pole • Positions: ON / OFF / EMERGENCY-BOTH • Color: Red • Battery combining: Yes • Alternator field disconnect: No • Max voltage: 32 V DC • Continuous current: 300 A • Intermittent current (5 min): 450 A • Cranking current (30 sec): 675 A per circuit • Battery connections: 2 • Terminal studs: M10 • Max cable size: 107 mm² • Cable seal diameter: 28.45 mm • Mounting: #10 screws • Weight: 0.36 kg The Blue Sea Main Battery Switch ON-OFF-EMERGENCY-BOTH Red M Series is an excellent choice for boats that require both secure battery isolation and emergency power combining capability. Its high current capacity, seamless switching function, and trusted Blue Sea Systems quality make it a reliable core component in any marine electrical system.