Description
Overview:
The Durite Voltage Sensitive Relay 140A is a compact, heavy-duty switching relay for managing dual battery systems on vehicles and machinery. It automatically links and separates batteries based on system voltage, allowing reliable split charging without draining the starter battery. It is suitable for vans, 4x4s, pick-ups, service vehicles, plant equipment and garden machinery fitted with auxiliary electrics such as work lights, winches or inverters.
Key Features:
- Genuine Durite VSR rated up to 140A for robust split-charge duties
- Red LED status indicator for quick visual confirmation of relay state
- Supports dual battery setups for auxiliary loads without manual switching
- Helps prevent discharge of the primary (starter) battery when parked or under load
- Straightforward to fit into most automotive and machinery electrical systems
- Durable construction suited to demanding trade and site environments
- CE approved for compliance with European safety standards
Typical Applications:
Split-charging a secondary battery in vehicles and machinery with extra electrical demand, including work vans, 4x4s, plant and agricultural equipment, recovery vehicles, service bodies, trailers with onboard power, and off-grid setups powering lights, fridges, inverters, pumps or winches while protecting the starter battery.
Also known as:
Split-charge relay, voltage sensing isolator, automatic charging relay (ACR), battery combiner, dual battery controller, smart relay, auxiliary battery relay.

