Vszerda
Vszerda LM4040 Precision Voltage Reference Module 2.048V 4.096V passive component
$17.99
0.00021551BTC
In stock
Adafruit
Adafruit ADA-1043 Aluminum SMT Heat Sink 0.27" square 70°C/W
A 0.27" square aluminum SMT heat sink with 70°C/W thermal resistance for surface-mount chips
- TypeOther
- Compact square footprint fits dense SMT layouts
- Low 70°C/W thermal resistance in still air
- 27" x 0.27" size suits BGAs, TSSOPs, QFNs
- 3" total height with option to file shorter
- Attaches with thermal tape or paste, no tape included
Targeted thermal relief for surface-mount chips
This 0.27" square aluminum heat sink is designed for engineers and hobbyists who need to cool flat packages such as SoCs, motor drivers, BGAs, TSSOPs or QFNs. It mounts directly on the component top using thermal tape or a small amount of paste. The low thermal resistance of approximately 70°C/W in still air makes it practical for moderate power dissipation.
Compact finned construction with filing option
Four round fins rise from a 6.7 mm square base to a total height of 7.6 mm, giving a .3 inch profile that can be filed shorter if enclosure clearance demands it. No thermal tape is included in the package, so the builder supplies their preferred interface material. The simple press-on approach suits hand assembly and low-volume production without special tooling.
Limited to natural convection performance
The 70°C/W rating applies only in still air, so forced airflow or higher power loads will require a larger solution. The sink suits medium flat packages but cannot handle devices needing substantially lower thermal resistance. Users must verify that the 6.7 mm footprint fits their specific component and board layout.
Highlights
- Compact square footprint fits dense SMT layouts
- Low 70°C/W thermal resistance in still air
- 27" x 0.27" size suits BGAs, TSSOPs, QFNs
- 3" total height with option to file shorter
- Attaches with thermal tape or paste, no tape included
Specifications
| Brand | Adafruit Industries |
|---|---|
| Model | ADAID-1043 |
| Part Number | ADA-1043 |
| Type | Other |
Questions about this item
What thermal resistance does this 0.27-inch square heat sink provide in still air?
The aluminium sink is rated at approximately 70 °C/W in still air, so a 1 W dissipation will raise the component about 70 °C above ambient.
What board footprint and clearance does the ADA-1043 require?
It occupies a 6.7 mm × 6.7 mm square footprint and stands 7.6 mm tall, though the fins can be filed shorter if the enclosure demands it.
How do you attach the heat sink to a flat SMT chip, and what is the common mistake?
Apply thermal tape or a thin layer of thermal paste to the chip top, then press the sink in place; the frequent error is using too much paste, which insulates instead of conducting.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
