Heat Sinks for High-Power Appliance Power Supplies

Requirement

The customer’s high-power appliance power board needs cooling at high annual volume, so unit cost matters. Internal space limits the sink to 18 mm height, and the enclosure is dark grey, so exposed parts cannot show a shade difference.

Our approach

We led with extrusion: a low-fin section that fits the height limit, cut to board width, which costs less than skiving. Small skived sinks handle the local hot spots. Both are anodized in the same bath to the same colour code so no machine shows two greys.

Delivery and inspection

Packed by model with each part labelled for its position; production sampled on length and appearance.

Project summary

Cost stayed in target, build height met the structure limit, and no visible shade variation appeared. The combination is in volume production on three models.