Alphacool 125 x 125 x 45mm Aluminum Heatsink 2 in 1 accessory

Large Passive Aluminium Heatsink

This 125 x 125 x 45 mm aluminium heatsink acts as a passive heat exchanger for electronic components. It draws thermal energy away from chips, LEDs, LCD drivers, power transistors and voltage regulators. The extruded high-density fin array increases surface area so that surrounding air can absorb heat without any fan noise. It is supplied as a single unit ready for mounting on compatible flat surfaces.

Replaces Inadequate Stock Cooling

The block upgrades from basic clip-on spreaders or bare-component operation when temperatures climb under sustained load. The jump is worth it whenever a component runs hot enough to throttle or shorten its lifespan yet has no active airflow of its own. Builders who need forced-air performance or liquid-cooling integration should look elsewhere because this unit relies entirely on natural convection.

Steady-State Thermal Behaviour

Under continuous load the fin stack reaches a stable temperature gradient as heat conducts through the solid aluminium base into the dense fins. Because there are no moving parts, acoustic output stays at zero and reliability does not degrade with bearing wear. The 45 mm fin height provides enough mass to buffer short peaks, but thermal resistance is fixed by the extrusion geometry and ambient airflow.