"Condensation was killing reliability, so I pushed for conformal coating on the control PCB and sealed connectors so moisture could not creep in and start corrosion or leakage paths. That one change targeted humidity and temperature swings in the field, where gear cools down overnight then gets hit with warm air during the day. The result was fewer intermittent faults and fewer returns that looked 'random' because the failure mode stopped coming and going with the weather.
A big concern in construction sites and outdoor infrastructure projects is dust, moisture, and vibrations. Standard enclosures fail because contaminants enter the connectors or cooling vents. One way to mitigate this is to isolation seal the power supply enclosure for the construction sites when the equipment is deployed. One case this was done was for temporary monitoring equipment at a road project, the enclosure was sealed and instead of a power connector, a grommet was used. This enclosure was designed to withstand dust and moisture and the temporary monitoring equipment was designed to withstand dust and moisture. There were very few case of intermittent power loss and almost no maintenance was needed. Crews stopped going to reset the device because the fault was no longer attributed to dust. With the new enclosure design, the system was able to run through the project season without interruption.
Conformal coating is a design technique that enhances the ruggedness of power supplies in challenging environments. It applies a protective layer to electronic circuitry, shielding it from moisture, dust, and chemicals, particularly addressing humidity-related issues that cause corrosion. By using materials like acrylic, silicone, or polyurethane, conformal coatings improve the reliability and longevity of power supplies, especially in outdoor or high-humidity areas.
A design approach that significantly improved power supply ruggedness in challenging deployments involved implementing conformal coating on critical PCB components combined with reinforced thermal management. This technique specifically addressed high humidity and dust exposure, conditions commonly found in industrial manufacturing floors and outdoor telecom installations. Conformal coating creates a thin protective polymer layer over circuit boards, preventing moisture ingress, corrosion, and contamination from particulate matter. According to research published by IPC, conformal coatings can reduce moisture-related circuit failures by up to 80% in high-humidity environments. In one deployment scenario involving edge infrastructure equipment operating in humid coastal conditions, the addition of conformal coating and improved heat dissipation reduced intermittent failures and increased the system's mean time between failures (MTBF) by nearly 35% over a 12-month period. From a leadership perspective in enterprise technology enablement, resilient hardware design remains critical as organizations expand infrastructure into more demanding environments where reliability directly impacts operational continuity.
One effective design technique for improving the ruggedness of a power supply in challenging deployments involves integrating enhanced thermal management with wider temperature-tolerant components. This approach directly addresses extreme temperature fluctuations often found in industrial environments, remote data centers, and outdoor infrastructure. By selecting capacitors and semiconductors rated for extended temperature ranges and incorporating improved heat dissipation through heat sinks and optimized airflow paths, system stability can be significantly strengthened. Research from the U.S. Department of Energy highlights that excessive heat remains one of the leading causes of electronic component failure, with temperature increases of just 10degC capable of cutting component lifespan by nearly half. In one deployment involving infrastructure systems operating in high-temperature industrial settings, the integration of high-temperature-rated components and optimized cooling reduced thermal-related shutdowns and improved system reliability, increasing mean time between failures (MTBF) by approximately 30% over a year of continuous operation. Observations like these reinforce the importance of environmental-aware engineering as organizations scale technology into harsher operational environments.
One design technique that significantly improved the ruggedness of a power supply involved implementing conformal coating on printed circuit boards combined with vibration-resistant component mounting. This approach addressed environmental stress caused by dust, humidity, and constant mechanical vibration, conditions commonly encountered in industrial facilities and remote infrastructure deployments. Conformal coating forms a thin protective barrier that shields circuitry from moisture and airborne contaminants, while reinforced mounting reduces stress on solder joints and sensitive components. Research from the IPC indicates that protective coatings can reduce moisture-related electronic failures by up to 80% in high-humidity environments. In one field deployment supporting industrial systems operating in dusty environments, this technique reduced unexpected power disruptions and improved operational stability, resulting in an estimated 30-35% increase in mean time between failures (MTBF) over a year of continuous operation. Observations like these highlight how resilience-focused engineering and risk-aware design practices play a critical role in maintaining infrastructure reliability in demanding environments.
One effective design technique is using conformal coating with selective potting on the most exposed parts of the power supply, especially the control board and connector areas. This helps protect the unit in harsh deployments where humidity and conductive dust can cause corrosion, leakage current, and intermittent faults. In practice, this approach led to fewer nuisance shutdowns and a noticeable drop in field failures, especially in dusty and high-moisture environments. The main result was better overall stability, longer maintenance intervals, and more predictable performance under tough operating conditions.
To address the many negative effects of voltage fluctuations on the operation and service life of the various electronic devices in use on vehicles operating on batteries (especially shuttle and bus systems), the fleet operations group has successfully applied surge suppression and proper DC-DC power conditioning as one of several effective approaches. The major issues associated with voltage spikes/vibration/heat/electrical fetidness on mobile devices was addressed through the use of properly conditioned input power and properly designed vibration-resistant and seal-mounted electronic devices (e.g., GPS receivers, tablets, routers, camera systems, etc.) to provide a measure of protection against the power supply-related failures. Based on our own experiences, the result was that the number of random resets of electronic devices and the improvement in their "up-time" when used out in the field increased substantially. A useful indicator of the robustness of this technology is that it has resulted in fewer service calls for electronic devices after being used in fleets with long daily operating hours. The overall conclusion is that by designing for the operating environment first and then adhering to the manufacturer's specifications for a particular product, you will develop a greater degree of robustness in achieving long-term durability from your on-board electronic devices.
From my experience working with deep tech founders through spectup, one design technique that consistently improves ruggedness is implementing conformal coating on critical power supply components. In a deployment for an outdoor sensor network, moisture and condensation were a recurring environmental challenge, especially with daily temperature swings creating condensation inside enclosures. Applying a thin conformal coating prevented corrosion on PCB traces and reduced short circuit risk. We also paired this with component derating choosing parts rated above expected operating voltage and temperature ranges which further improved resilience under fluctuating conditions. In practice, this combination significantly reduced field failures. In one instance, units that previously showed a 12% failure rate over six months in humid conditions dropped to under 2% after coating and derating were applied. The lesson I've carried into other hardware projects is that addressing the specific environmental stressors humidity, dust, or vibration early in the design cycle prevents costly iterations later. It also improves reliability metrics, which matters both for client trust and investor confidence when demonstrating product-market readiness.
Conformal coatings can serve to enhance the ruggedness of power supply products, especially when applied to PCBs. These coatings provide a protective barrier for sensitive electronic parts against environmental hazards (humidity, condensation and airborne dust) that can accelerate degradation of electronic parts. In one deployment with a particularly challenging environment, connectors had developed corrosion that caused intermittent faults and/or poor electrical connections due to the degradation of solder connections. The conformal coating provided a barrier that prevented moisture or contamination from damaging the circuit. The reliability of the power supplies has significantly improved over time. Failures associated with corrosion and/or short circuits have decreased dramatically, and the power supplies are much more reliable in high humidity conditions than they were prior to the application of the conformal coating. Overall, the addition of a conformal coating was a relatively small design change; however, the long-term benefit of increasing durability of the product in this environment was significant.
We deployed IoT monitoring hardware at a mining site in the Pilbara region of Western Australia where ambient temperatures regularly exceed 50 degrees Celsius and fine iron ore dust infiltrates everything. The power supplies for our sensor arrays were failing every three to four months, which made the entire monitoring system unreliable and expensive to maintain. The technique that solved it was implementing conformal coating on all PCB assemblies combined with oversized aluminium heatsinks that doubled as sealed enclosure walls. Rather than fighting the heat with active cooling, which would introduce more failure points like fans and filters, we designed the enclosure so the heatsink surface area was roughly three times what the thermal calculations required. The power supply essentially used the entire outer casing as a passive heat dissipation surface. The conformal coating addressed the dust ingress problem. We used a silicone-based coating rated for continuous operation above 200 degrees Celsius, applied at roughly 75 microns thickness across all exposed components. This created a moisture and particulate barrier without affecting electrical performance or trapping heat against the components. The results were significant. Mean time between failures went from approximately 100 days to over 14 months. We've had units running continuously for 18 months now without intervention. Maintenance visits dropped from quarterly to annual, which at a remote mining site saves roughly $4,000 per unit per year in helicopter and technician costs alone. The upfront cost of the redesigned enclosure and coating process added about $120 per unit, making the return on investment undeniable.
To increase the robustness of the unit, we added a conformal coating and made improvements to the enclosure's sealing around the power supply, so that moisture, condensation, and conductive dust would be kept out of the unit. This was in response to our experience with deploying this unit where moisture and airborne contamination were causing intermittent faults and corrosion on some of the exposed components. As a result of these changes, we experienced a significant reduction in field failures and nuisance shutdowns and a significant improvement in our operation stability during seasonal temperature and humidity variations." You could say something like, "The number of field failures decreased about 30% because of the changes we made," or "We clearly noticed a reduction in service calls during the following two quarters due to the upgrades we made," as long as those statics are valid.
One successful technique for addressing ruggedisation is to use conformal coating for protecting power supplies from exposure to moisture, dust and corrosive elements. The technique has been effective at protecting the power supplies used in outdoor applications or by industrial or high humidity environments that could allow contaminants to create short circuits, leaking or could lead to the premature failure of components. Some of the primary metrics that have been used by the teams in determining the success of conformal coating include: the reduction in intermittent failure rates, the improvement of long term reliability and the number of products returned from the field. The addition of durability of conformal coating is also attributable to the defence of all components that are subjected to environmental conditions which also contribute to high failure rates of power supply units in extreme environmental conditions.
Another useful design technique used for enhancing power supply PCB through use of conformal coating and also enhancing sealing about connectors to help minimize environmental effects (i.e., moisture, dust, and condensation), which cause corrosion of PCBs, intermittent faults, and undesired resets of equipment in harsh environments. Long-term reliability is typically improved as fewer nuisance failures occur and service calls are reduced. In many instances, the ruggedness of power supplies will be attributed not to using a "rugged" power supply but to how to properly protect the "weak" portions of the power supply (e.g., exposed boards and connection points).
One effective design technique is applying conformal coating to the power supply PCB. This helps protect the circuitry from harsh environmental conditions, especially high humidity and dust, which can create leakage paths, corrosion, and unstable performance over time. In practice, it improved reliability by reducing failures caused by moisture and contamination around sensitive components and high-voltage areas. The result was more stable output and longer operating life in environments that were dirty, damp, or otherwise difficult to control.
Using conformal coating as well as a protective sealant on sensitive components in power supplies will increase their reliability by providing more protection from moisture, wet conditions, dust and other environmental contaminants that could cause damage to these components or create electrical shorts. The solution addressed how equipment is affected by the extreme environment including elevated levels of humidity, as well as thermal cycling that creates condensation at various locations over time. As a result of this application, the overall reliability of power supplies was improved over the long term (reduced corrosion-related failures), and there was an increased stability of performance for power supplies in demanding field locations.