Blue Sea SI Series Auto Charge Relay (12V/24V DC / 120A)

Blue Sea SI-ACR Start Isolation Automatic Charging Relay 7610 automatically combines batteries during charging, isolates batteries when discharging and when starting engines.
Features:
Protects sensitive electronics by temporary isolation of house loads from engine circuit during engine cranking
Designed for 12 or 24 volt systems
12/24 volt auto ranging voltage input
Hermetically sealed contacts/vaporproof
Ignition protected - safe for installation aboard gasoline powered boats
Supports high-output alternators up to 120 Amperes
Dual sensing
Optional Features:
Start Isolation allows temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics from sags and spikes
Remote LED remotely indicates ACR states - requires optional LED

Specifications
Nominal Voltage: 12V DC & 24V DC
Start Isolation: Yes
Amperage Operating Current: 175mA (combined), 15mA (open)
Terminal Stud Torque: 140 in-lb (15.82 Nm)
Continuous Rating: 120A
Intermittent Rating (5 min): 210A
Cable Size to Meet Ratings: 1/0 AWG
Stud Material: Tinned Copper
Terminal Ring Diameter Clearance: 1.12" (28.45 mm)
Terminal Stud Length: 0.875" (22.23 mm)
Terminal Stud Size: 3/8" - 16 (M10)

Relay Contact Position
Combine 30 sec: 13.6V @ 12 V, 27.2V @ 24 V
Combine 90 sec: 13.0V @ 12 V, 26.0V @ 24 V
Open 10 sec: 12.35V @ 12 V, 24.7V @ 24 V
Open 30 sec: 12.75V @ 12 V, 25.5V @ 24 V
Open High: 16.0V @ 12 V, 30.0V @ 24 V
Overvoltage Lockout: 16.0V @ 12V, 32.0V @ 24V
Undervoltage Lockout: 9.5V @ 12 V, 19V @ 24 V
Weight: 1.25lb (0.57 kg)

Approvals: CE, Ignition Protected, IP67, ISO 8846 Marine, SAE J1171 Marine, UL 1500