Durite Part No. 0-727-33 

Voltage sensitive relay, 12 volt 140 amp with red LED indicator. Allows split charging of second battery bank without discharging the primary/start battery, relay makes at 13.3 volts and breaks at 12.65 volt.

Length 68mm x width 54mm x height 68mm.
 
CE approved. 

Additional information 
A 5 second delay operates when the voltage falls below the cut-out voltage to prevent nuisance cut-out due to high intermittent loads on the battery. Supplied with self tapping screws and ring crimp terminal for ground lead.

Specification 

Type - Voltage Sensitive Relay
Voltage - 12 volt
Current - 140 Amps Max.
Cut-in voltage - 13.3 volt (±0.1 volt)
Cut-out voltage - 12.65 volt (±0.1 volt)
Cut-out time delay - 5 seconds
Terminals - 2 x M6 (Max Torque 5 +/-1N.m)
Ground lead - 600mm
Dimensions - see image 2
Weight - 220g