Heatsink extrusions for LED lighting

1 May 2013 Circuit & System Protection

Ohmite Manufacturing is supplying Wakefield Solutions’ 19000 series radial-fin heatsink extrusions for LED light engines.

Developed in conjunction with an engineering team from a leading LED manufacturer, the 19000 series is designed to help LED engineers meet both space constraints and operating parameters. With a low-cost, lightweight aluminium profile, it offers high thermal performance that makes matching the right heatsink to the right LED a much less time-consuming process.

In addition to being black anodised for maximum thermal performance, the heatsinks are also constructed with a radial-fin geom-etry that has been optimised for natural convection. This design is well suited for many types of LED lighting fixtures.

Though 19000 series heatsinks are most commonly used in both recessed and externally mounted downlighting applications, they are equipped with extrusion profiles that suit a variety of LED configurations. Mounting features are in fact incorporated as part of the extrusion, so that the heatsink can be easily mounted with standard hardware.

Each extrusion profile has screw bosses located precisely to enable easy LED substrate attachment, and provisions for slip-nut attachment make it easy to assemble the heatsinks into diverse lighting fixtures.

Wakefield offers five different models of the 19000 series, each designed for a different maximum power rating and expected temperature rise above ambient temperature. Options range from a maximum 14,7°C rise for a 4,5 Watt power rating to a maximum 29,2°C rise for a 42,8 Watt power rating. All models do not exceed a maximum LED substrate temperature of 75°C, and are available in multiple sizes, weights and thermal resistances.

Heatsink lengths range from 50,8 to 190,5 mm, with diameters of 32 to 115 mm, while their weights range from 92 grams to 1199 grams. Available power ratings include 42,8; 26,3; 9; 4,5 and 24 Watts, with corresponding thermal resistances of 0,68; 1,15; 2,38; 3,27 and 1,15 C/W.

For more information visit www.ohmite.com

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