Online supplier of electronic cooling solutions - fans, heatsinks & thermal kits

Overview: electronic cooling solutions available online

Finding the right electronic cooling solution is essential for reliable circuits, power supplies, single-board computers and motor drivers. As an online supplier of electronic cooling solutions, Communica stocks axial and blower fans, aluminium and copper heatsinks, thermal pads, thermal grease, heatpipes, fan controllers and accessory kits suited to hobby, education and industrial prototyping. We focus on locally available stock, practical compatibility notes, and options that are easy to source for South African projects.

Common product groups

• Fans: 40mm-120mm axial fans, 5V/12V/24V options and blower fans for concentrated airflow.
• Heatsinks: small PCB-mounted extruded aluminium, bonded copper plates and profile heatsinks for power semiconductors.
• Thermal interface materials: greases, pads, tapes, phase-change materials with varying thermal conductivity.
• Active cooling assemblies: fan+heatsink kits and small form-factor blower solutions for single-board computers.

Why local supply matters

Buying from a South African online supplier reduces lead times and import uncertainty. Communica offers branch collection from Samrand (head office), Pretoria CBD and Cape Town where possible, VAT invoices for procurement, and stock visibility to help plan teaching labs or production runs. Check branch availability and collection details at Branches & Trading Hours.

Quick spec comparison

Explore our thermal categories and brands to compare parts: Collections and browse component ranges at All Products.

Selection criteria and calculations

Key factors when selecting cooling parts: device power (W), allowable temperature rise, mounting constraints, airflow direction, noise and supply voltage. Use Ohm’s law and power basics when sizing associated drivers and fans: for DC fans, P = V x I. If a 12V fan draws 0.15A, power = 12 x 0.15 = 1.8W; ensure the supply can handle continuous draw plus other loads.

Simple heatsink temperature estimate

Temperature rise = Power dissipated (W) x Thermal resistance (°C/W). Example: a regulator dissipating 4W on a heatsink with 8°C/W will see a rise of 32°C above ambient. If ambient is 30°C, estimated component temperature = 62°C (add junction-to-case delta from the datasheet to estimate junction temperature).

Wiring diagram (fan with a PWM controller)

  +12V -----+-----[Fan +]-----
             |                  
          [Fuse 1A]             
             |                  
  GND  -----+-----[Fan -]-----

  PWM signal --> Fan PWM pin (3rd or 4th wire)   

For multiple fans, use a dedicated fan controller or MOSFET switch with proper current rating. When using 5V fans with 12V systems, do not connect directly; choose the correct voltage variant or use a regulator.

Compatibility and accessory bundles

Communica offers accessory bundles such as fan + heatsink + thermal pad kits for SBC cooling and power module kits for students. When selecting, confirm mounting hole spacing, base plate thickness and whether the fan requires a 2-pin, 3-pin or 4-pin connector for PWM control. For brand browsing and specific parts, see Shop by Brand.

Availability, procurement and local support

Stock levels and lead times in South Africa can fluctuate. Communica provides stock visibility online, branch pickup from Samrand and other locations, VAT invoicing and account quotes for education or procurement teams. To review pickup options and hours, visit Branches & Trading Hours. For a quick product sweep, try searching thermal categories in the site catalog: Collections.

Practical South Africa use cases

• University labs: low-cost fan+heatsink kits for power electronics labs where repeatability and easy replacement matter.
• Makers and hobbyists: compact 40mm fan assemblies and thermal pads for Raspberry Pi-style single-board computers.
• Technicians: replacement 120mm fans and compatible connectors for local repairs and maintenance.

Specification callouts to verify

• Operating voltage and inrush/current draw (for supply sizing).
• Airflow (CFM), static pressure for blower fans.
• Thermal resistance (°C/W) and mounting dimensions.

Sources

• Communica official site - product categories and branch information
• Adafruit - Thermal management concepts and practical tips
• Electronics Tutorials - Fans, airflow and thermal basics
• SparkFun - Heat sinks and thermal management for hobbyists