Item #862682

Blue Sea Systems ML-ACR Automatic Charging Relay

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$205.99 - $214.99
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                  Image of : Blue Sea Systems ML-ACR Automatic Charging Relay Blue Sea Systems ML-ACR Automatic Charging Relay Item # 862682


                  500A magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine.


                  • Automatically manages the charging of two large battery banks
                  • Allows paralleling of battery banks for emergency starting
                  • 500 Ampere continuous rating to support high-output alternators
                  • Magnetic Latch (ML)—ACR draws very low current (<40mA to monitor terminal voltage) in the "ON" or "OFF" states, and draws moderate current for very short time when changing state
                  • Dual sensing—senses charge on both battery banks
                  • Start Isolation (SI)—can be configured for temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics
                  • Engine Isolation (EI)—can be configured for isolation of two engines while both are running to protect engine electronics and maximize alternator output
                  • Senses charging on two battery banks
                  • LED output to remotely indicate when batteries are combined, isolated, in voltage lockout, or in Start or Engine isolation
                  • 3/8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
                  • 7/8" (22mm) stud length accepts multiple cable terminals
                  • Silver alloy contacts provide high reliability for switching live loads
                  • Label recesses for circuit identification


                  • Control Circuit Connection : Tinned Wire or Deutsch DTM / Amphenol ATM
                  • Nominal Voltage: 12 or 24V DC
                  • Manual Control : No
                  • Engine Isolation : Yes
                  • Mounting: #10
                  • Start Assist : Yes
                  • Start Isolation : Yes
                  • Amperage Operating Current: 13mA
                  • Amperage Operating Current when changing state: <7.0A
                  • Terminal Stud Torque: 140 in-lb (15.82 Nm)
                  • Continuous Rating : 500A
                  • Intermittent Rating : 700A (5 min)
                  • Cranking Rating 30 sec : 1450A DC
                  • Cable Size to Meet Ratings: 4/0 AWG x 2
                  • Live Current Switching: 300A @ 12V DC
                  • Switching Cycles: 100000
                  • Terminal Ring Diameter Clearance: 1.18" (29.97 mm)
                  • Terminal Stud Length: 1.50" (38.1 mm)
                  • Terminal Stud Size: 3/8" - 16 (M10)

                  Data Sheet


                  This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm.

                  For more information go to

                  Part Numbers for Blue Sea Systems ML-ACR Automatic Charging Relay


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