In industrial power supplies, LED drivers, communication base stations, and other outdoor equipment, we often see switching power supplies that are completely "potted"—the entire circuit board is completely encased in a layer of transparent or gray resin. This seemingly ordinary resin is actually the "invisible armor" of the switching power supply, providing five core functions to ensure its long-term stable operation in harsh environments. I. Waterproof and Moisture-proof – "Invisible Waterproof Casing"The primary function of potting is waterproofing and moisture protection. The potting compound (mostly silicone or epoxy resin) forms a dense, non-porous barrier after curing, effectively blocking water, salt spray, acids, alkalis, and other corrosive media. This allows the power supply to operate reliably in high-humidity, outdoor, and salt-spray environments (I...

① Waterproof and Moisture-proofThe potting compound (mostly silicone or epoxy) completely encapsulates the circuit, forming a dense barrier that blocks water, salt spray, acids, alkalis, and other corrosive media, allowing the power supply to operate reliably in outdoor, salt spray, and high-humidity environments.   ② Thermal Conductivity and Heat DissipationThe thermal conductivity of the potting compound is 0.8-3.0 W/m·K, far higher than air. It quickly conducts heat from heat-generating components such as MOS transistors and transformers to the outer casing, effectively dissipating heat from each component and reducing temperature rise, thus extending lifespan.   ③ Mechanical Fixing and Vibration ResistanceAfter curing, the potting compound becomes an elastomer, which can buffer vibrations and shocks, preventing solder joints and components from ...