The Ohmite E series is offered in multiple extrusion lengths and is black anodized to provide great thermal performance in natural convection applications. This extrusion form can be used for TO-220, TO-218, and TO-247 devices and provides a thermal resistance as low as 3 °C/W. For use with Ohmite part series TBH25, TCH35, and TEH100. These heatsinks can also be used for other power devices requiring thermal assistance.