Voltage Sensitive Relay (VSR).

Series: 8556 VSR
View My Favourites

The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time.
When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously.

When the voltage drops below 12.8 volts (eg the engine is stopped), the VSR disengages, separating the batteries. This system eliminates the possibility of draining the start battery and protects sensitive electronic equipment powered from the auxiliary battery from harmful engine start up spikes.

12V DC 1 Year Warranty
Option Part Number
12V DC, Voltage Sensitive Relay 12V DC, Voltage Sensitive Relay 3099
Housing description Impact resistant plastic
Termination Stud Size 2 x 6mm (1/4'')
Degree of Protection IP 56
Voltage 12V DC
Max. load 12V DC 125 A continuous (140 A intermittent)
Dimensions 69 x 69 x 51mm (W x D x H)
Voltage Sensitive Relay Line Drawing
Top of Page