EMI/RFI Shielding and Thermal Control in Industrial Electronics
Modern industrial electronics face increasingly complex operational challenges driven by the transition to Industry 4.0, process digitalization, and the widespread adoption of high-efficiency electric drives. Euro Technologies is a leading company in the industrial electronics sector, providing innovative products and tailored services designed to meet the demands of advanced technical applications.
As an authorized distributor and converter of Laird products — a brand that became part of Qnity Electronics (an independent company spun off from DuPont’s former electronics business) — Euro Technologies supports design engineers in developing high-reliability equipment. We deliver customized solutions that ensure full compliance with electromagnetic compatibility (EMC) standards and optimal heat dissipation inside inverters, motor drives, switched-mode power supplies (SMPS), industrial PCs (IPC), programmable logic controllers (PLCs), and control cabinets.
Technical Challenges in Industrial Environments
Electronic devices for industrial environments frequently operate under severe environmental conditions and in the presence of intense electromagnetic noise fields. Key design challenges include:
- High Electromagnetic Switching Noise: High-frequency power semiconductors (such as IGBTs and wide-bandgap SiC/GaN devices) used in inverters and power converters generate strong conducted and radiated electromagnetic interference (EMI/RFI).
- Thermal Management in Sealed Enclosures (IP65/IP67): Industrial cabinets and housings often cannot utilize direct forced-air cooling to prevent the ingress of dust, oil, or moisture. This requires high-performance thermal interface materials to transfer heat to external heatsinks.
- Mechanical and Chemical Resistance: Shielding and sealing gaskets must maintain their elastic and conductive properties under continuous vibration, wide thermal cycling, and exposure to aggressive chemicals or lubricants.
Technologies and Products for Industrial Electronics
Euro Technologies boasts specialized expertise in advanced materials for EMI/RFI shielding and thermal management, delivering guaranteed optimal performance for demanding industrial applications.
1. Microwave Absorbers and RF Suppression (Laird Eccosorb® Line)
In advanced materials for shielding and frequency control, the Eccosorb® product line provides guaranteed optimal performance and superior shielding effectiveness. Among the most advanced solutions is the Eccosorb RF-LW range—a high-performance absorber operating in the sub-6 GHz spectrum that combines lightweight design, thermal stability, corrosion resistance, and low outgassing properties. It is ideal for suppressing antenna desensitization, reducing internal reflections, and mitigating cavity resonances in industrial sensors, wireless modules, and communication gear.
2. Thermal Interface Materials (TIM) and Thermal Gap Fillers
To ensure the reliable operation of power electronics and processors in Industrial PCs, we supply a broad range of Thermal Interface Materials (TIM). Our portfolio includes soft, highly conformable Gap Fillers, silicone-free formulations to prevent contamination of sensitive optical or electrical contacts, and phase change materials that eliminate thermal resistance under maximum operating loads.
3. Form-in-Place Dispensed Gaskets (FIPG)
For sealing die-cast aluminum covers, drive frames, and miniaturized enclosures, Form-in-Place (FIPG) technology enables the robotic deposition of conductive and silicone gaskets directly onto the substrate. This automated process speeds up assembly while ensuring uniform EMI shielding and precision environmental sealing.
4. Electrically Conductive Elastomers
Conductive elastomers filled with conductive metal particles (such as nickel-graphite or silver-aluminum) deliver an ideal balance of radio-frequency shielding and airtight environmental protection (IP67/IP68). They are well suited for outdoor control cabinets and process instrumentation exposed to harsh corrosive atmospheres.
5. Board Level Shielding (BLS) and Fingerstock Contact Springs
Printed circuit board shields (Board Level Shielding – BLS) isolate data processing blocks from adjacent power components, preventing cross-talk. For shielding industrial server racks, electrical cabinet doors, and plug-in modules, beryllium-copper fingerstock contact springs provide consistent electrical conductivity and high resistance to mechanical fatigue.
Q&A: Frequently Asked Questions on Industrial Electronics
How do you reduce electromagnetic interference (EMI) in industrial inverters and motor drives?
In inverters and power converters, rapid switching of power semiconductors generates high-frequency noise. To mitigate this EMI, Board Level Shields (BLS) are applied over control circuits, conductive elastomer gaskets line the perimeters of metal enclosures, and microwave absorbers (such as the Laird Eccosorb® line) are used inside cavities to dampen RF noise and internal resonances.
Which thermal interface materials are best suited for Industrial PCs (IPCs) and sealed enclosures?
In sealed industrial enclosures (IP65/IP67), heat must be conducted away from critical components (CPUs, power modules) toward outer walls or passive heatsinks. Highly conformable thermal Gap Fillers and phase change materials are ideal because they conform to surface roughness, minimizing thermal resistance without exerting mechanical stress on soldered components.
What advantages do Eccosorb® line absorbers provide in suppressing electromagnetic resonances?
Microwave absorbers from the Eccosorb® line (such as the Eccosorb RF-LW series) suppress cavity resonances and surface currents formed inside metallic housings of industrial equipment. By reducing internal reflections and preventing antenna desensitization in integrated communication modules, they ensure stable, noise-free operation even in high-frequency environments.
