Sager Electronics’ technical support manager—thermal, Vineet Barot, advises on selecting effective cooling solutions to meet design goals and improve device performance.
Medical electronics require effective thermal management to ensure reliable operation within specified temperature ranges. Efficient heat dissipation improves system reliability, reduces size, weight, energy consumption and noise. In a global market that is expected to reach $1.2 billion by the end of 2028 as projected by BCC Research, demand for thermal management solutions is rising as medical device sizes continue shrinking.
Products such as heat sinks, fans and thermal interface materials are integral to medical application designs and are imperative to maintaining proper functioning while ensuring patient safety. However, the challenge for sourcing professionals is ensuring the selected components are readily available, certified to the latest ISO standards and meet function, durability and reliability requirements.
Fan manufacturers have largely standardized on sizes, differentiating themselves based on specifications such as efficiency and noise levels.
Compatibility between fan manufacturers is generally easier compared to other components like heat sinks, cold plates or custom complex thermal assemblies. For custom parts, it is crucial to understand who owns the design and the implications of shifting to a different supplier. This knowledge can prevent potential disruptions in the supply chain and ensure a smoother transition if a change becomes necessary. Multi-Sourcing at the initial design phase, when possible, can help to ensure a consistent flow of product when unexpected supply chain issues arise.
Recent US government measures regarding extrusions have introduced complexities in sourcing aluminum extruded heat sinks from China and other countries, significantly increasing costs. Sourcing managers should consider alternatives, such as suppliers capable of domestic manufacturing or sourcing from countries with minimal or no anti-dumping and countervailing duties. Additionally, exploring different manufacturing methods—such as skiving, bonded fin, zipper fin or casting—can offer cost-effective solutions without compromising on performance.
Thermal interface materials (TIMs) such as grease, phase change materials, gap fillers or adhesive tapes typically have a shelf life of one year or less. Collaborating with a reliable distribution partner is essential for effective inventory management. A reputable distributor will provide material certifications detailing the remaining shelf life on shipment. Sourcing managers should consider establishing internal purchasing requirements, such as ensuring shelf life is properly understood and maintained. Scheduled shipments or coordinated supplier dropships from a distributor can help mitigate potential future issues.
Working with authorized distributors and channel partners is important, as these relationships can help ensure that essential thermal management components are available when needed, meet quality standards and comply with regulatory requirements. Engaging suppliers and distributors who are ISO 13485-2016 certified for medical devices is crucial. By addressing multi-sourcing strategies, understanding the implications of anti-dumping measures and managing the shelf life of thermal interface materials, sourcing managers can navigate the complexities of the supply chain effectively.