MDF Contactor Boards

Safe, heavy-duty power distribution for multiple grow lights

Our MDF Contactor Boards give you a ready-built, professional-grade way to run several HID ballasts and fans from a single supply. Built around top-quality components and a genuine 24hr Grasslin timer, they're for growers running more than a light or two who want their switching done properly rather than daisy-chaining extension leads. Available in 12/14-socket and 16/18-socket configurations.

Key Benefits

• Two board sizes — 12/14-socket and 16/18-socket — to match your number of lights and fans
• Quality 24hr Grasslin timer switches all but two of the sockets on a reliable schedule
• Two constant-power sockets on every board for fans and other kit that must run continuously
• 40A contactor on the 14-socket board, doubled to an 80A double contactor on the 18-socket board
• 120A-rated connector block, overrated and capable of handling up to sixteen 600W lights
• Contactor takes the load off the timer, ensuring safe, reliable activation of your ballasts

Fixing overloaded leads and unreliable timer switching

Running multiple HID ballasts off a standard timer or extension lead pushes current through components never rated for it — a common cause of timer failure and a genuine fire risk. These boards pass the load through a properly rated contactor and 120A connector block, so your lighting switches reliably and safely however many lights you run.

How to Use

• Choose the 12/14-socket or 16/18-socket board for your number of lights and fans
• Set your light schedule on the Grasslin timer
• Plug ballasts into the timed sockets and fans into the two constant-power sockets
• All contactor boards must be installed by a qualified electrician