As ambient temperatures rise, all power supplies experience derating—a necessary reduction in output power to stay within thermal limits. This behavior is reflected in the derating curve, which varies depending on the cooling method employed.

Key Cooling Approaches:
● Forced-Air Cooling (with fan): Thermally effective but introduces long-term reliability risks due to fan wear, dust accumulation, and acoustic noise.
● Natural Convection: Fanless and quiet, but airflow performance heavily depends on enclosure layout—often limited in compact or sealed systems.
● Conduction Cooling: Transfers heat from the power module's baseplate to a chassis or heatsink—ideal for harsh, sealed, or dust-laden environments.

Compared to traditional fan-based designs, ARCH's conduction-cooled and semi-potted power supplies offer flatter derating curves and superior output stability in high-temperature or high-altitude environments.

Fanless thermal designs are the preferred choice in environments where airflow is limited or reliability is paramount, such as:
● Remote telecom base stations
● Industrial control cabinets and automation lines
● Outdoor IoT or smart city gateways
● EV charging infrastructure and rail systems
● Energy storage, solar inverters, and renewable power systems

These installations often face temperature extremes, dust, moisture, and vibrations—factors that shorten fan lifespan and complicate maintenance access.

In conventional designs, the cooling fan is the first point of failure. While initially effective, fans typically last 20,000 to 40,000 hours, far below the lifespan of industrial systems. Once the fan degrades or fails, internal temperatures rise, triggering shutdowns, performance loss, or permanent damage.

Even before total failure, dust buildup, corrosion, or airflow obstruction can drastically reduce cooling efficiency—even if the fan is still operational. For systems operating in remote, rugged, or maintenance-restricted environments, conduction cooling is the most cost-effective and reliable thermal solution.

ARCH offers a wide portfolio of fanless AC-DC power supplies from 40W to 1300W, built for silent, maintenance-free, and long-life performance in demanding conditions.

Our Lineup Includes:
● Conduction- and convection-cooled models for general industrial applications
● Semi-potted, conduction-cooled series (130W / 240W / 500W / 1300W) for superior thermal and mechanical resilience

ARCH's semi-potted design combines smart thermal engineering with rugged mechanical stability:
● Adds thermal mass for heat absorption and dissipation
● Enables direct conduction to the system enclosure or heatsink
● Reinforces structure for vibration and shock resistance
● Provides enhanced moisture/dust protection without the full weight of complete potting

This design ensures superior thermal reliability in compact formats, making it ideal for harsh, fan-restricted, or sealed environments.

With no moving parts, ARCH fanless power supplies offer:
● Silent operation
● Zero fan failure risk
● Long-term stability in corrosive, dusty, and vibration-prone installations

Whether you're powering smart infrastructure, unattended energy systems, or mission-critical edge devices, ARCH's semi-potted, conduction-cooled power supplies deliver unmatched reliability, thermal performance, and deployment flexibility—backed by global certifications and decades of design experience.