Description
Overview:
The Voltage Sensing Combi Relay 12V for Caravan Supplementary Socket (MPN 763 607) is an automatic relay unit for 12V towing electrics. It monitors the vehicle's system voltage and switches a live feed to power the caravan's supplementary circuits when the vehicle is running. When the engine is off and voltage falls, it disconnects the feed to prevent draining the starter battery. This makes it suitable for supplying loads such as caravan fridge and charging circuits via the supplementary towing socket. The unit is designed for installation in towbar wiring on cars, 4x4s, vans and light commercials used for towing. By combining the control and switching in one module, it provides a straightforward way to manage auxiliary caravan power without manual switching and helps maintain reliable power only when the vehicle is at operating voltage.
Key Features:
- 12V voltage-sensing relay for towing electrics
- Automatically connects the auxiliary feed when vehicle voltage rises with engine running
- Automatically disconnects when voltage falls to protect the vehicle's starter battery
- Supplies caravan supplementary circuits, including fridge and charging feeds
- Combi relay format for simple integration into towbar wiring
- Designed for use with supplementary towing sockets (12S/7-pin grey or 13-pin systems)
- Helps prevent flat batteries by isolating loads when ignition is off
- Suitable for cars, 4x4s, vans and light commercial vehicles with 12V systems
Typical Applications:
Installed as part of a towbar wiring loom to switch the auxiliary 12V feed to the caravan via the supplementary socket. Commonly used to power caravan fridge and leisure battery charging circuits on 12S (7-pin grey) or 13-pin towing setups. Appropriate for fleets and trade installations where automatic isolation of caravan auxiliary loads is required to protect vehicle batteries.
Also known as:
Split Charge Relay
Voltage Sensing Relay (VSR)
Caravan Fridge Relay
Supplementary Socket Relay
Combi Relay
PCT ZR1220
Maypole part number MP2877B
Product Specifications
| L&S Part No. | 763 607 |
|---|---|
| Part Type | Genuine Part |
| Unit of Sale | 1 |
