Greenbox MDF Contactors - Timer Board

Heavy-duty MDF contactor boards for reliable, centralised control of lighting, fans, heaters and other grow-room equipment. Each board pairs a mechanical 24-hour analogue timer with a contactor rated for inductive loads, so you can schedule multiple circuits from one point without overloading a standard household timer. Built on an MDF backing with fixing points in the corners for wall mounting. All contactor boards must be installed by a qualified electrician.

Available configurations

• 12/14: 12 timed sockets plus 2 constant-power sockets (14 total). 24hr mechanical timer, 40A rated. 41 x 37 x 13cm, 5kg.
• 16/18: 16 timed sockets plus 2 constant-power sockets (18 total). 24hr mechanical timer, 40A rated. 43 x 50 x 13cm, 5kg.
• Double 16/18: 16 timed sockets plus 2 constant-power sockets (18 total). 24hr mechanical timer, 40A rated. 43 x 50 x 13cm, 5kg.
• Double 16/21: 16 timed sockets, 4 constant-power fan sockets and 1 dedicated heater socket rated up to 1200W (21 total). 24hr mechanical timer. 42 x 49 x 12cm, 6.8kg.
• Double 20/25: 20 timed sockets, 4 constant-power fan sockets and 1 dedicated heater socket rated up to 1200W (25 total). 24hr mechanical timer. 39 x 61 x 12cm, 9.3kg.
• Double 24/28: 24 timed sockets plus 4 constant-power sockets (28 total). 24hr mechanical timer, 40A rated. 45 x 63 x 13cm, 8kg.
• Consumer Unit 24/32: 24 timed sockets plus 8 constant-power sockets (32 total) for the largest multi-circuit setups. 24hr mechanical timer, 40A rated. 63 x 83 x 13cm, 10kg.
• 10 Way Plug Socket Extension Board: a straightforward 10-socket extension board with no timer or contactor, for adding extra plug capacity alongside a controlled board. 50 x 19 x 8cm, 1.5kg.

Timed sockets switch on and off with the board's mechanical timer; constant-power sockets (including any dedicated heater or fan socket) stay live at all times for equipment that needs to run continuously.