External Mount Heat Sink for 40A SSR

This external mount heat sink is for dissipating the heat from 25A or 40A SSR. The SSR and its wiring will stay inside the box. The advantage of using a external mounting is that there is no need for venting hole or cooling fan in the controller box.  Mounting screws and heat conductive grease are included.

Dimension:  100 x 100 x 50 mm (4"x4"x2").
Mounting Hole: 5 mm diameter on four corners with 84 mm spacing 
User will need to cut a 70x55 mm (2.75"x2.2") rectangular hole for the SSR.
Thermal Resistance 1.45 C/W.

SSR Mounted to the Heatsink

Mounting cutout

Example that shows how the heat sink can be mounted.