Captive screws maximise heat dissipation

A new line of captive screws designed specifically for electronic heatsink applications provides a consistent, high-load mechanical fastening solution that maximises thermal conductivity

A new line of Southco captive screws designed specifically for electronic heatsink applications provides a consistent, high-load mechanical fastening solution that maximises thermal conductivity regardless of chip thermal expansion, shock and vibration.

The physical design of the new Southco 5T Heat Sink Series Captive Screws provides thermal and mechanical engineers involved in printed circuit board applications with several distinct advantages beyond the capabilities of previous heatsink fastening methods.

The design provides a consistent set preload up to a maximum of 22N per screw to maximise surface contact and thermal conductivity throughout the range of chip expansion.

This can actually allow for a smaller heatsink, conserving space and costs.

Each screw features a positive stop to set the preload to help prevent the possibility of board damage.

Designed to mount at the outer edges of the heat sink, these captive screws cause minimal or no interference with heatsink fins and do not compromise their function.

The hardened-steel captive screws with stainless steel springs deliver durable performance to withstand drop tests and vibration testing.

Because the screws are captivated into the heat sink panel itself and feature a self-contained spring, there is no loose hardware to short-circuit or damage the circuit board.

The spring-loaded design also compensates for inconsistent chip and interface material thickness.

Southco 5T Heat Sink Screws come with a standard #2 Phillips/slot headstyle.

A flare-in installation style makes it easy to captivate screws within the heat-sink material.

The heat sink screws are free of hexavalent chrome, and in salt spray corrosion testing have exceeded 144 hours of treatment.

Multiple screw thread sizes and lengths are available.

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