SI-ACR Automatic Charging Relay - 12/24V DC 120A

Specifications

Nominal Voltage
12V DC24V 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***
210A (5 min)

Cable Size to Meet Ratings
1/0 AWG

Stud Material
Tinned Copper

Terminal Ring Diameter Clearance
1.12in (28.45 mm)

Terminal Stud Length
0.875in (22.23 mm)

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

Relay Contact Position
 

Combine 30 sec
13.6V @ 12 V27.2V @ 24 V

Combine 90 sec
13.0V @ 12 V26.0V @ 24 V

Open 10 sec
12.35V @ 12 V24.7V @ 24 V

Open 30 sec
12.75V @ 12 V25.5V @ 24 V

Open High
16.0V @ 12 V30.0V @ 24 V

Over Voltage Lockout
16.0V @ 12V32.0V @ 24V

Under Voltage Lockout****
9.5V @ 12 V19V @ 24 V

Weight
1.25lb (0.57 kg)

 
*Condition: Engine starting

Relay is open isolating batteries
Batteries are isolated to protect sensitive electronics from voltage sags and spikes

**The maximum current a switch is designed to conduct for an indefinite period.
***The maximum amount of current a switch is designed to carry for a minimum of a designated period of time.
****As a safety feature, some ACRs prevent combining into a severely discharge battery. A dual-sensing ACR will monitor the voltage on both batteries and will not connect if either battery is below the undervoltage lockout level. Use caution when combining into a battery with extremely low voltage, because this might represent a faulty battery or a problem elsewhere in the system.