Gallery View: Customization drives production of heat sinks

Makers of heat sinks in China emphasize the use of lighter-weight aluminum for higher heat dissipation, enabling better energy efficiency in applications.

Manufacturers of heat sinks in China continue to highlight customization, which covers any material and surface treatment. Their capability spans aluminum, copper, steel, alloy and stainless steel, brass and titanium, and anodizing, blackening, electroplating, painting, powder coating, passivating and carburizing. The key uses are in mobile electronics, computers, power supplies, LEDs and the automotive field. New energy vehicles are forecast to be a hot application in the years to come.

To match trends, companies are favoring aluminum as copper's replacement because it is lighter and has better heat dissipation. The latter quality ensures greater energy efficiency in terminal products. The common grades include alloy 2024, 5052, 6061, 6063, 6082 and 7075.

Custom-made heat sinks account for more than 90 percent of local makers' total shipments. Overall, units for desktop and notebook PCs, and the automotive industry represent about 70 percent of the aggregate volume.

In China itself, the line will have a total market scale of up to $32.3 billion by 2023, rising from $22 billion in 2018, according to Qianzhan Research Institute.

Suppliers turn entirely to local sources for materials. Most ensure the inputs meet RoHS requirements. If costs remain stable, there will be no adjustments in the prices of heat sinks.

The products in this gallery have been handpicked by our China-based market analyst for representing current trends in heat sinks from China makers.

Clean, deburred finish

For PCBs, this RoHS-compliant heat sink from Dongguan Kinggold Industry Co. Ltd, KF01-24 model, is made of aluminum and comes with a clean and deburred finish.

The supplier requires an order of at least 6,000 pieces for delivery within 15 days.

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For LEDs, RoHS-compliant

This aluminum heat sink with a natural finish from Dongguan Kinggold Industry Co. Ltd, KF17-19 model, suits LED applications and meets RoHS requirements.

The 100-piece minimum order has a delivery lead time of 15 days.

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±0.002mm or ±0.00008in tolerance

Mulmic Co. Ltd markets the Heatsink-5139 model with ±0.002mm or ±0.00008in tolerance. The RoHS-compliant unit is made of aluminum, steel, alloy or stainless steel, brass, copper, bronze or titanium with a polished, mirrored, brushed, sandblasted or heat-treated finish. The surface treatment options include anodizing, blackening, electroplating, painting, powder coating, passivating and carburizing.

The minimum order is 100 pieces and delivery takes 10 days.

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0.01 to 0.05mm tolerance

Made of aluminum, titanium, brass, copper, bronze or plastic, Mulmic Co. Ltd's Heatsink M-33a model with 0.01 to 0.05mm tolerance can be anodized, plated, painted, powder-coated, printed, etched, color-filled, polished, sandblasted or tumbled.

The minimum order of 100 pieces is for delivery within 10 days.

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Anodized in various colors

Model HS6094 heat sink from Yeahest Manufacture Ltd is made of aluminum and can be anodized in various colors. OEM and ODM requests are accepted.

An order of at least 3,000 pieces is required. Delivery takes 20 days.

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Precision-machined, custom designs

From Yeahest Manufacture Ltd, the model Hs6070 aluminum heat sink undergoes high-precision machining. It comes in custom designs and various finishes.

The minimum order is 100 pieces. Delivery lead time is 12 days.

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