Heatsinks · Extruded
Extruded aluminum heatsinks
Extruded aluminum heatsinks are the workhorse of thermal management — continuous finned profiles produced from a dedicated die, ideal for medium power densities and high volumes at low tooling cost.
When to choose extruded
If your power density is moderate and volume is meaningful, an extruded heatsink beats machined or skived on cost. The fins are formed in the extrusion die, so there is no per-part cutting — only cut-to-length and secondary machining of the base.
Fin density is the main limit: practical fin height-to-thickness (fin ratio) reaches about 40:1. Beyond that, skived or bonded construction performs better.
Typical specs
- Fin pitch: 4–12 mm common
- Base flatness: per print, milled if needed
- Alloy: 6063 (finish), 6061 (strength)
- Finish: anodized clear/black
Capability
| Parameter | Capability |
|---|---|
| Fin ratio (h:t) | up to ~40:1 |
| Max width | 500 mm |
| Base machining | CNC milled mounting, holes, pockets |
| Finish | Anodize II/III, powder coat |
Design tip
- Keep fin thickness ≥ 1.2 mm and pitch ≥ 4 mm for airflow and die life.
- Specify base flatness if mounting to a flat device.
Quote an extruded heatsink
Send the envelope, power and airflow — we return alloy, fin proposal and price.