pcb potting

The appropriate compound depends on operating temperature, thermal management, flexibility, chemical exposure, electrical insulation, vibration, moisture protection, and rework requirements. Common material families have different performance characteristics, so selection should start with the application's actual environmental requirements.

Conformal coating applies a relatively thin protective layer over PCB surfaces and components. Potting encapsulates more of the assembly with a substantially thicker material layer. Potting generally provides greater physical encapsulation, while conformal coating preserves more component access and typically adds less weight.

Properly selected potting materials can provide environmental and mechanical protection against conditions such as moisture, contamination, shock, and vibration. Effectiveness depends on compound selection, adhesion, coverage, cure, assembly design, and the operating environment.

Potting changes the thermal path around components. Depending on the compound and design, it can either assist heat transfer or trap heat around temperature-sensitive components. Evaluate thermal conductivity, component power dissipation, material thickness, and operating temperature before specifying the process.