Blue Sea ML Series HD Auto Charge Relay (12V DC / 500A)

Blue Sea 500 Amp magnetic latching (bi-stable) relay 7620 automatically combines batteries during charging and isolates batteries when discharging and when starting engine.

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 maximise 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

Specifications

Control Circuit Connection: Tinned Wire

Nominal Voltage: 12V 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 (5 min): 700A

Cranking Rating 30 sec: 1450A DC

Operating Temperature: -10°C to 60°C

Cable Size to Meet Ratings: 4/0 AWG x 2

Live Current Switching: 300A @ 12V DC

Stud Material: Tinned Copper

Switching Cycles: 100000

Terminal Ring Diameter Clearance: 1.12" (28.45 mm)

Terminal Stud Length: 1.50" (38.1 mm)

Terminal Stud Size: 3/8" - 16 (M10)

Wire Size: 20 AWG

Relay Contact Position

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 2.04lb (0.93 kg)

Approvals: CE, IP66, ISO 8846 Marine, SAE J1428