## Technical Overview of ATS-18B-91-C2-R0 The **ATS-18B-91-C2-R0** is a high-performance heat sink manufactured by **Advanced Thermal Solutions (ATS)**. It belongs to the **maxiFLOW™** series, designed specifically for cooling electronic components like BGA (Ball Grid Array) packages, CPUs, or GPUs that require efficient heat dissipation in high-velocity airflow environments. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | Advanced Thermal Solutions (ATS) | | **Part Number** | ATS-18B-91-C2-R0 | | **Attachment Method** | pushPIN™ (Spring-loaded) | | **Material** | Aluminum (Body), Copper (Optional Base) | | **Finish** | Blue Anodized | | **Thermal Resistance** | 6.39°C/W (Unducted Flow @ 200 LFM) | | **Dimensions** | 40.00mm x 40.00mm x 10.00mm | --- ### 2. Major Components and Design Features #### A. The Heat Sink Body (maxiFLOW™ Design) The "maxiFLOW" geometry features a spread-fin pattern. Unlike standard straight fins, these fins are tapered and angled. * **Purpose:** This design maximizes the surface area and increases turbulence, which improves heat transfer from the metal to the surrounding air. * **Effect:** It reduces the "pressure drop," allowing air to flow through the fins more easily compared to traditional high-density heat sinks. #### B. pushPIN™ Attachment System Instead of using messy thermal adhesives or simple clips, this part uses the **pushPIN™** system. * **Components:** It consists of a plastic or metal pin and a high-tension compression spring. * **Advantage:** It ensures a precise and consistent "clamping force" against the electronic chip. This optimizes the contact between the chip and the heat sink, minimizing thermal resistance. #### C. Thermal Interface Material (TIM) The "C2" in the part number often indicates the type of thermal interface material pre-applied to the base. * **Function:** This is a phase-change material or thermal grease that fills microscopic air gaps between the heat sink and the component. * **Impact:** Without a high-quality TIM, even the best heat sink will fail because air is a poor conductor of heat. --- ### 3. Thermal Performance Metrics Performance is measured by **Thermal Resistance (θja)**. Lower values are better. * **@ 200 LFM (Linear Feet per Minute):** 6.39 °C/W * **@ 500 LFM:** 3.43 °C/W * **@ 800 LFM:** 2.62 °C/W *Note: As airflow increases, the efficiency of the heat sink increases significantly.* --- ### 4. Application Use-Cases This specific part is typically found in: 1. **Telecommunications:** High-speed routers and switches. 2. **Embedded Computing:** Industrial motherboards and single-board computers (SBCs). 3. **Power Supplies:** Cooling MOSFETs or power regulators.