Blue Sea Systems ML ACR Charging Relay, 12V 500A with Manual Control

The Blue Sea Systems ML ACR Charging Relay is a 500-amp magnetic latching relay designed to automatically combine battery banks during charging and isolate them during discharge or engine starting. This dual-sensing unit is built for high-output alternator systems and features a manual control switch that allows for safe servicing and emergency battery paralleling.

Key Features:

• 500A continuous rating with 700A intermittent and 1450A cranking ratings.
• Magnetic latching technology draws minimal current in active states.
• Configurable Start Isolation (SI) and Engine Isolation (EI) to protect sensitive electronics.
• Remote LED output for status monitoring of combined, isolated, or lockout modes.
• Silver alloy contacts for high-reliability live load switching.
• 3/8"-16 tin-plated copper studs for corrosion resistance and conductivity.
• Deutsch DTM control circuit connection.
• Label recesses for clear circuit identification.

Technical Specifications:

• Nominal Voltage: 12VDC
• Live Current Switching: 300A at 12VDC
• Switching Cycles: 100,000
• Terminal Stud Torque: 140 in-lb (15.82 Nm)
• Required Cable Size: 2x (4/0)
• Stud Length: 0.875" (22.23 mm)
• Operating Current: 13mA (standby), <7.0A (when changing state)

Regulatory Note: This product contains chemicals, including di(2-ethylhexyl)phthalate (DEHP), known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit P65Warnings.ca.gov.