Blue Sea 7622100 ML ACR Charging Relay 12V 500A w/Manual Control & Deutsch Connector

The Blue Sea 7622100 ML ACR Charging Relay 12V 500A with Manual Control and Deutsch Connector is a magnetic latching relay engineered for dual-battery and auxiliary power systems in vehicles, marine vessels, and tactical platforms. This 500-amp relay automatically combines batteries during charging cycles and isolates them during discharge and engine starting—critical functionality for operators managing multiple power sources in field operations, expedition vehicles, or off-grid installations where battery management can mean the difference between mission capability and mission failure.

The ML ACR's bi-stable magnetic latching design means it maintains its state without continuous power draw—a significant advantage in extended field deployments where parasitic drain must be minimized. The integrated manual control switch provides operator override capability independent of electrical state, essential for service work and emergency scenarios where power isolation is required for safety. The Deutsch connector ensures weather-sealed, corrosion-resistant electrical connection in harsh environments—salt air, dust, mud, and extreme temperature swings that degrade standard automotive connectors. At 500 amps, this relay handles high-amperage loads common in auxiliary winch systems, heavy communication arrays, or tactical lighting suites without voltage sag.

This relay suits expedition and recovery vehicles, marine command centers, mobile tactical command posts, and any dual-battery configuration requiring intelligent power management without microprocessor dependency. The manual lock-off feature specifically addresses technician safety concerns during maintenance operations—a consideration Blue Sea Systems has engineered into professional-grade marine and automotive electrical systems for decades. The 12V specification aligns with standard vehicle electrical architecture, making this a direct upgrade over basic solenoid relays in applications demanding reliability under sustained high-load conditions.