LORDWORLD Aluminum Heatsink B for Raspberry Pi CM4 with Antenna Notch

Dedicated Heatsink for Raspberry Pi CM4

This aluminium heatsink is engineered specifically for the Raspberry Pi Compute Module 4. It matches the module dimensions and mounting holes precisely, providing a direct thermal interface for the processor and memory components. The corrosion-resistant alloy ensures long-term durability in embedded applications. It is aimed at developers and integrators building custom carrier boards who need reliable passive cooling.

Antenna Notch and Simple Mounting

A dedicated cut-out preserves clearance for the CM4's onboard antenna or an external antenna connector, preventing signal attenuation. The heatsink sits directly on the SoC and RAM using thermal pads or paste, requiring no active airflow or additional brackets. This keeps the mechanical stack height low, which is critical for space-constrained enclosures or stacked HAT configurations. Installation is a matter of aligning the four mounting holes and securing the supplied screws.

Suits Passive CM4 Builds; Not for Active Cooling

This heatsink suits engineers deploying CM4 modules in fanless industrial gateways, handheld devices, or dense clusters where silence and reliability are priorities. It will not meet the thermal demands of sustained heavy workloads that exceed the dissipation capacity of passive aluminium alone. Builders planning overclocked operation or high ambient temperatures should evaluate active cooling solutions instead.