How to Select Potting Compound for Explosion-Proof Power Supplies
Power‑supply potting compound is a specialized adhesive designed for encapsulating electronic components such as power modules, transformers, and inductors. It not only effectively shields these components from moisture, dust, and corrosive gases but also provides vibration damping, compression resistance, and thermal conductivity, thereby enhancing the overall stability and reliability of electronic equipment. For devices operating in harsh environments—such as outdoor LED displays and underwater sensors—power‑supply potting compound serves as an indispensable protective layer.
Shanghai Hinnel
Jul 20,2026
Requirements for potting compounds in power supplies
1. Waterproofing: The potting compound tightly encapsulates the entire electrical portion of the power adapter, completely isolating it from the external environment. This prevents water, moisture, and corrosive substances such as acids, alkalis, and salts from reaching the circuit components, thereby enhancing its resistance to water, humidity, and corrosion. Therefore, the adhesive you select should exhibit excellent fluidity, low permeability, and, once fully cured, form a dense, impermeable structure that meets… IP67 or IP68 Security classification standards.
2. Thermal conductivity: Power adapters are power‑handling devices that convert, regulate, and deliver energy to external loads. During operation, they generate heat; components such as switching transistors, transformers, electrolytic capacitors, and inductors are all heat‑generating parts—and also heat‑sensitive. Therefore, the potting compound must possess a high thermal conductivity (e.g., …). 0.8 W/mK above), helping to dissipate heat while also being resistant to -40℃ To +180℃ The above-mentioned wide temperature variation.
3. Dielectric strength, as an electronic component’s “ Insulation barrier ” , the potting compound must withstand high voltage without breakdown; its dielectric strength typically needs to reach 2000V That concludes the discussion. Bubbles, impurities, or insufficient curing can lead to partial discharges, posing safety risks. Therefore, it is necessary to take into account… AB Whether the formulation ratio is appropriate, whether the blending is sufficiently uniform, and whether all other conditions are met.
4. Impact resistance: Industrial environments often experience vibration or mechanical shock, so the potting layer must possess adequate elasticity and bonding strength. ≥10MPa ), absorbs stress, and prevents components from loosening or PCB Cracking.
Product Recommendations:
Hinnel 5：1 Thermally Conductive and Flame-Retardant Epoxy Potting Compound It is suitable for potting explosion-proof power supplies, offering rapid curing and preventing cracking in large-volume encapsulation. It exhibits excellent resistance to damp heat and extreme temperatures, as well as superior flame retardancy. Moreover, we can tailor various performance parameters to meet specific customer process requirements. Using state-of-the-art equipment, we simulate production conditions and conduct rigorous testing of adhesive formulations and application processes, enabling us to swiftly identify the most appropriate product.
In the automotive industry, potting technology has become an essential step in ensuring the stable operation of explosion-proof power supplies. If you have any questions or requirements regarding explosion-proof power supply potting solutions, please feel free to contact Hinnel New Materials—we will provide professional technical support and customized solutions!
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