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Find heat sinks, thermal pads, fans and mounting hardware in South Africa. Local stock, VAT invoices, branch pickup and account quotes from Communica.
Collect heat sinks and cooling parts from Samrand or Pretoria branches to avoid delays.
Use Pd × Rth to estimate temperature rise and choose appropriate sinks and TIMs.
Combine sinks, thermal pads and fans for prototyping and quicker installation.
Choosing the right heat sink and thermal components is essential for reliable electronics, from Raspberry Pi projects to power converters and motor drivers. This page helps South African makers, technicians, engineers and procurement teams buy heat sink technology components available locally - including aluminium extrusions, stamped sinks, thermal interface materials (TIMs), active cooling fans and mounting hardware.
When you buy heat sink technology components, compare these published specifications on product pages and datasheets: thermal resistance (°C/W), base dimensions, fin geometry, airflow direction, maximum operating temperature, and mounting compatibility (e.g., TO-220, TO-247, SMD packages). For fans, check voltage (usually 5V/12V), current, and dBA noise ratings.
Consideration: Local availability matters. Components listed on our collections can often be collected from Samrand or Pretoria branches to avoid shipping delays; check stock before ordering.
| Type | Typical Thermal Resistance (°C/W) | Common Use |
|---|---|---|
| Small stamped sink | 5-15 | Linear regulators, small MOSFETs |
| Extruded fin sink | 0.5-5 | Power supplies, motor drives |
| Heat pipe/active assemblies | 0.1-1 | High-power converters, CPUs |
For hands-on projects and parts browsing, see our shop categories and full product index to compare available items and brands: Browse heat sink and cooling components and see all products.
Start with the power dissipation of your component (Pd, in watts) and the maximum allowed temperature rise. Use the thermal resistance of the heat sink (Rth, °C/W) to estimate junction temperature. A basic target is to keep junction temperature below the device's maximum rating with margin for ambient South African workshop temperatures (commonly 25-35°C indoors).
Example formula: Temperature rise (°C) = Pd (W) × Rth (°C/W). Add ambient temperature and thermal interface drop to estimate junction temperature.
Example 1 - TO-220 linear regulator dissipating 3W: using a sink with Rth = 5°C/W gives a temperature rise of 15°C above ambient. At 30°C ambient the component case rises to about 45°C plus any junction-to-case delta shown on the device datasheet. Adding a thermal pad with low thermal resistance improves conduction into the sink.
Power dissipated (Pd) can be calculated from current and voltage: Pd = V × I. For resistive loads, use Pd = I^2 × R or Pd = V^2 / R. Use Pd in the thermal calculations above to size the heat sink.
Example wiring (ASCII): +12V ----[ Fan + ]---- Fan ----[ Fan - ]---- GND Use a PWM signal or series resistor to control speed where supported.
When buying, consider matching the sink to your package: TO-220 sinks often use screw clips; SMD components may require phase-change tape or conductive epoxy. Bundles combining a small extruded sink, thermal pad and 5V fan are convenient for prototyping - check accessories alongside the main item on the product page.
Buy with local convenience: Communica offers account quotes and VAT invoices for procurement teams, plus branch collection from Samrand and Pretoria to speed project timelines. Check stock levels before ordering via the main site: Communica homepage. For company background and service offerings, see About Us.
Compare specifications, request a quote for bulk items, or check local stock before collection. Use the site to Request a Quote, Check Stock in Samrand, or Request a Quote depending on your needs.
Communica supplies semiconductors and electronic components to industries such as automotive, electrical, automation, mining, and education.
Disclaimer: This content is for educational purposes only. Product availability, pricing, and specifications are subject to change. Always verify current details on the retailer's website before making a purchase. We may earn affiliate commissions from qualifying purchases.
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