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Blue Sea Systems Automatic Charging Relay 7622

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ML-ACR 500A Automatic Charging Relay with Manual Control 12V DC 7622 - Blue Sea Systems

Product Condition: NEW
Blue Sea Systems Automatic Charging Relay 7622
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

SSL Cerficate

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



  • Manual control switch provides an added level of safety allowing control with or without power, and offering LOCK OFF capability for servicing
  • Includes ML-Series Remote Control Contura Switch PN 2146
  • 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
  • Lifetime replacement warranty



  • Part No.: 7622
  • Control Circuit Connection: Tinned Wire
  • Nominal Voltage: 12V DC
  • Manual Control: Yes
  • Engine Isolation: Yes
  • Mounting: #10
  • Start Assist: Yes
  • Start Isolation: Yes
  • Amperage Operating Current: 13mA
  • Amperage Operating Current when changing state: <7.0A
  • Continuous Rating: 500A
  • Intermittent Rating: 700A (5 min)
  • Cranking Rating 10 sec: 2500A
  • Cranking Rating 1 min: 1100A
  • Cable Size to Meet Ratings: 4/0 AWG x 2
  • Live Current Switching: 300A @ 12V DC
  • Switching Cycles: 100000
  • Terminal Ring Diameter Clearance: 1.12in (28.45 mm)
  • Terminal Stud Length: 1.50in (38.1 mm)
  • Terminal Stud Size: 3/8" - 16 (M10)
  • Terminal Stud Torque: 140 in-lb (15.82 Nm)
  • Dimensions: See image #5



  • Combine 30 sec: 13.5V
  • Combine 90 sec: 13.0V
  • Open 10 sec: 12.35V
  • Open 30 sec: 12.75V
  • Open High: 16.2V
  • Weight: 2.06lb (0.93 kg)

Additional Information

Product Condition NEW
upc 632085076221

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