New heatsink design from Ohmite

28th May 2009

ES Admin

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Aware that thermal management is an important part of environmental care, and that anything which doesn’t require the use of electricity in order to maintain acceptable temperatures, is likely to be welcomed by design engineers, Ohmite has launched the first of a range of heatsinks which not only meet these requirements, but also save time and money.

Specifically designed for use with TO-220 and TO-247 packages, including Ohmite’s own TAH20, TBH25, TCH35, TEH70, TK20 and TN15 power resistors, the heatsinks feature an integrated clip for securing the component to the heatsink without the need of a screw.

Pressure is directed on to the center of the heat dissipating device, maximising the efficient transfer of heat and avoiding the cantilever effect which can result from over torqueing the screw in conventional designs. The torsion spring clip also has solderable feet to secure the assembly to the PCB.

Among the many advantages to this design are the reduced labour cost of assembly. The spring clips make mounting holes, screws, and fasteners obsolete in the assembly process. The spring coil also provides superior performance under shock and vibration. Light weight and resilient, the spring clip can absorb energy as it locks the electronic component in place. Since no screw hole needs to be tapped, stray metal particles are eliminated as is the possibility of an accidental short circuit resulting from their presence.

Ohmite plans to release a number of derivative heatsink products based on this design over the next few months including dual, ganged, and SMD versions.