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 effectively protects these components from moisture, dust, and corrosive gases, while also providing shock resistance, compression resistance, and thermal conductivity, thereby enhancing the overall stability and reliability of electronic equipment. For electronic 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
2026/03/17
Encapsulation requirements for adhesives in power supplies
1. Waterproofing: Potting compound tightly encapsulates the entire electrical portion of the power adapter, completely isolating it from the external environment. As a result, water, moisture, acids, alkalis, and salts cannot penetrate the circuit components, thereby enhancing its resistance to water, humidity, and corrosion. Therefore, the adhesive you select should exhibit excellent flowability, low permeability, and, upon complete curing, form a dense, impermeable structure that meets IP67 or IP68 Security classification standards.
2. Thermal conductivity: Power adapters are power-conversion devices that convert, regulate, and deliver energy to external loads. During operation, these adapters generate heat; components such as switching transistors, transformers, electrolytic capacitors, and inductors are all heat-generating parts and are sensitive to high temperatures. Therefore, the potting compound must have a high thermal conductivity (e.g., 0.8 W/mK above), aiding heat dissipation while also being resistant to -40℃ To +180℃ The above wide-temperature variation.
3. Insulation strength, as an electronic component “ Insulating 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 discharge, posing safety risks. Therefore, it is necessary to consider AB Whether the formulation ratios are reasonable, whether the mixing is thorough and uniform, and whether all other conditions are met.
4. Impact resistance: Industrial environments often involve vibration or mechanical impact, so the potting compound must possess a certain degree of elasticity and bond strength ( ≥10MPa ), absorb stress, and prevent components from loosening or Printed Circuit Board Cracking.
Product Recommendations:
Hinnel 5：1 Thermally Conductive, Flame-Retardant Epoxy Potting Compound It is suitable for potting explosion-proof power supplies, featuring rapid curing, resistance to cracking during large-volume potting, excellent resistance to damp heat and extreme temperatures, and outstanding flame-retardant performance. Moreover, we can tailor various performance parameters to meet specific customer process requirements by leveraging state-of-the-art equipment to simulate production conditions and conduct comprehensive testing of adhesive formulations and application methods, thereby enabling swift identification of the most appropriate product.
In the automotive industry, potting technology has become an important part of 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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