Blue Sea Systems 7601 m-ACR Automatic Charging Relay, 65 Amp 12/24V DC

The Blue Sea Systems 7601 m-ACR Automatic Charging Relay automatically combines battery banks when charging and isolates them when discharging, keeping house and engine circuits properly separated until an alternator is running. It is designed to manage charging current from alternators up to 65 Amps, the range found on most outboards and many inboard engines, making it a compact solution for dual-battery bank management. A Start Isolation (SI) function temporarily isolates house loads from the engine circuit during engine cranking, protecting sensitive house electronics from the voltage sags and spikes that occur when the starter draws current. The m-ACR operates automatically at 12V DC or 24V DC and switches up to 65 Amps of contact current through Normally Open, Quick Connect terminals with tinned brass contacts for corrosion resistance in a marine environment. Its compact housing supports three mounting styles: surface mount, rear mount, or panel mount, giving installers flexibility in tight helm or engine bay spaces. The m-ACR is also offered as a module within a Custom 360 Panel for builders who want it integrated into a larger electrical panel layout. With a 10 second operating time and a 9.5V under-voltage lockout threshold, the relay is built to respond predictably to real charging conditions rather than momentary voltage fluctuations, helping protect both battery banks from unwanted cross-connection or premature isolation.

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 7601
• Product Type: Automatic Charging Relay
• Current Rating: 65 Amps
• Contact Current Rating: 65 Amps
• Maximum Switching Current: 65 Amps
• Maximum Switching Voltage: 24 Volts
• Minimum Switching Voltage: 10.8 Volts
• Coil Voltage: 24 Volts
• Specification Met: 12V DC, 24V DC, 9.5V Under Voltage Lockout
• Wattage: 1560 watts
• Operation Mode: Automatic
• Operating Time: 10 Seconds
• Connector Type: Quick Connect
• Contact Type: Normally Open
• Contact Material: Tinned Brass
• Number of Terminals: 2
• Mounting Type: Panel Mount, Surface Mount
• Weight: 0.8 pounds
• Country of Origin: United States
• UPC: 632085076016

Frequently Asked Questions

What does the Blue Sea Systems 7601 m-ACR do? It automatically combines two battery banks when the alternator is charging and isolates them again when charging stops, so the house bank cannot drain the starting bank between charges.

What is the maximum alternator output the m-ACR 7601 can handle? It is designed to manage charging current from alternators up to 65 Amps, the output range found on most outboards and many inboard engines.

Does the 7601 work on both 12V and 24V systems? Yes, the m-ACR 7601 operates automatically on 12V DC or 24V DC systems and is rated for up to 24 Volts maximum switching voltage.

What is Start Isolation (SI) on the m-ACR? Start Isolation temporarily isolates house loads from the engine circuit during engine cranking, which protects sensitive house electronics from the voltage sags and spikes a starter motor can cause.

How is the Blue Sea Systems 7601 mounted? The compact m-ACR design supports three mounting styles: surface mount, rear mount, or panel mount, allowing it to fit a range of helm or engine bay layouts.

How much current can the 7601 relay switch? The m-ACR 7601 has a maximum switching current of 65 Amps and a contact current rating of 65 Amps, using Normally Open, Quick Connect terminals.

What are the relay contacts made of on the 7601? The m-ACR uses tinned brass contacts, chosen for corrosion resistance in a marine electrical environment.

At what voltage does the m-ACR isolate the battery banks? The 7601 has a minimum switching voltage of 10.8 Volts and includes a 9.5V under-voltage lockout as part of its specification, so it isolates the banks once voltage drops rather than staying combined indefinitely.

How fast does the Blue Sea Systems 7601 respond to a change in charging state? The m-ACR has a 10 second operating time, allowing it to respond to real charging conditions rather than momentary voltage fluctuations.

How much does the Blue Sea Systems 7601 weigh? The m-ACR 7601 weighs 0.8 pounds.

Can the m-ACR 7601 be integrated into a larger electrical panel? Yes, in addition to standalone surface, rear, or panel mounting, the m-ACR is also available as a module within a Custom 360 Panel.

Where is the Blue Sea Systems 7601 manufactured? The m-ACR 7601 has a stated country of origin of United States.