Description
Overview:
The Durite 12V Voltage Sensitive Relay (VSR) - 140A (MPN: 0-727-33) is a compact, heavy-duty switching relay for managing dual battery systems on vehicles and machinery. Built with a hard-wearing black plastic body and metal terminals, 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. This genuine Durite part engages at 13.3V and disengages at 12.65V to protect battery health and maintain dependable starting. CE approved and easy to site thanks to its small footprint (L 68mm x W 54mm x H 68mm), it is a practical choice for both trades and DIY users.
Key Features:
- Genuine Durite 12V VSR rated up to 140A for robust split-charge duties
- Automatic cut-in at 13.3V and cut-out at 12.65V to protect the starter battery
- Red LED status indicator for quick visual confirmation of relay state
- Compact size: 68mm (L) x 54mm (W) x 68mm (H) for flexible installation in tight spaces
- 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 12V automotive and machinery electrical systems
- Durable construction suited to demanding trade and site environments
- CE approved for compliance with European safety standards
- Sold individually as a genuine part for consistent performance and compatibility
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.
Alternate Part Numbers:
0-727-33, 072733
Product Specifications
| L&S Part No. | 125 3405 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Durite |
| OEM No. | 0-727-33 |
| Unit of Sale | Each |
| Machine Type | Batteries |
