
Natural convection moves 3-10 W/m2-K; forced air 25-100+. When passive wins, when a fan wins. BQUQ (ISO9001, Dongguan) quotes in 12 hours.

Pads, grease and gap fillers compared by impedance, clamp pressure and reworkability. BQUQ (ISO9001, Dongguan) quotes in 12 hours.

Why black anodized heat sinks radiate better: emissivity numbers, when radiation matters, how to spec it. BQUQ (ISO9001, Dongguan) quotes in 12 hours.

IGBT heat sink sizing: conduction and switching losses, resistance budgeting, forced-air numbers. BQUQ (ISO9001, Dongguan) quotes in 12 hours.

Size LED heat sinks by junction temperature: lumen depreciation and lifetime math with real numbers. BQUQ (ISO9001, Dongguan) quotes in 12 hours.

Fin spacing, height and orientation with typical values for passive and fan-cooled heat sinks. BQUQ (ISO9001, Dongguan) quotes in 12 hours.

R = ΔT/Q with a worked example, plus typical convection values (natural 5–10, forced air 25–100 W/m²·K) and the thermal spec your factory needs.

6063-T5 conducts roughly 200 W/m·K vs 155–170 for 6061-T6. When the alloy matters for heat sinks and when strength wins. Typical values explained.

Extruded, CNC-machined, stamped, and skived heat sinks compared: tooling cost, fin density, and which wins at your volume, from a Dongguan source factory.