Close this search box.


Electronics manufacturers representative for Ohio, PA, IN, MI, WV and KY

Serving OH, MI, IN, W. PA, WV and KY

D Series Heatsinks More Efficient Than Anything Else on the Market

Efficient heatsinks

The extruded designs on Ohmite’s DSeries heatsinks make them much more efficient than anything else on the market due to their large surface area.

These surface mount heatsinks are extruded, not stamped. The extruded designs are far more efficient than any stamped counterpart. One of the main issues is getting heat from the board level into the heatsink. The extrusion allows for large pads and a direct thermal path from the board and into the heatsink. The ability to get the heat off the board coupled with its large surface area yields a surface mount heatsink unmatched in the market.

Ohmite D Series heatsinks provide an innovative solution for SMT compatible semiconductors and resistors. The unique design (patent pending) combines tin-plated, solderable rods with an aluminum extruded heat sink body. These rods (or “rollers”) are mated mechanically to the heatsink by forging to reduce the thermal resistance between the heatsink body and the solderable feet.

Specifically designed for use with the increasingly popular TO-252, TO-263 and TO-268 packages, the D Series affords the user superior thermal performance over the more common stamped aluminum heatsinks. By eliminating the staking joint typically used in stamped heatsinks, the resulting air gap and thermal “bottleneck” is also eliminated, while surface area for cooling is maximized with the extruded fins of the D Series body.


  • Increased surface areas by 3 times; therefore thermal performance up to 300% over the aluminum stamped heat sinks on markets
  • Lightweight aluminum construction allows faster pick and place assembly, reducing the manufacturing cycle time
  • Radius mounted “rollers” are designed for maximizing heat transfer from the component and avoiding the thermal “bottleneck” seen in stamped and staked heatsinks
  • Available in bulk packaging or tape and reel (200 or 250 based on part series)
  • RoHS-compliant

More info

We are honored to serve as a manufacturer’s rep for Ohmite. Questions? Please contact us for info. Ohmite has been the leading provider of resistive products for high current, high voltage, and high energy applications for over 80 years.