Description
12V 140A Smart Dual Battery Isolator (VSR)
This voltage-sensitive relay automatically manages charging between a vehicle’s starter battery and auxiliary battery. It connects both battery banks when charging voltage rises and isolates them when voltage falls, helping to prevent auxiliary loads from discharging the starter battery.
How It Works
• When the starter battery reaches approximately 13.3V, the VSR engages and allows the auxiliary battery to charge.
• When voltage falls to approximately 12.8V, the VSR disengages and separates the two batteries.
• Automatic isolation helps preserve starting power and protects auxiliary equipment from engine-start voltage fluctuations.
Key Features
• 12V DC dual-battery voltage-sensitive relay
• 140A rated battery isolator
• Automatic connection and disconnection
• Built-in surge protection
• Low standby power consumption
• M6 copper power studs
• Compact design for simple installation
• Suitable for cars, 4WDs, RVs, caravans, trucks and marine applications
Specifications
• System voltage: 12V DC
• Rated current: 140A
• Cut-in voltage: approximately 13.3V
• Cut-out voltage: approximately 12.8V
• Power terminals: M6 copper studs
• Dimensions: approximately 68 × 68 × 52mm
Package Includes
• 1 × 12V 140A Smart Dual Battery Isolator
Version Notice
This product may be supplied in either the classic or updated housing according to stock availability. The exterior appearance, label and display/control layout may vary. Both versions provide the same core 12V VSR battery-isolation function.
Important: This is a DC voltage-sensitive relay for 12V battery systems; it is not an AC isolator. Use correctly rated cabling and fuse protection, and follow suitable automotive or marine installation practices.
12 Months Warranty
