Open Frame vs U-Channel Power Supplies: Which One Do You Need?

What is an Open Frame Power Supply?

An Open Frame Power Supply consists of an uncontained printed circuit board (PCB) assembly designed to be integrated directly inside a protective host enclosure. With components exposed to the ambient environment inside the device, open frame power supplies rely primarily on natural convection or system-directed forced airflow for cooling.

Because there is no external heavy metal chassis, Open Frame PSUs provide exceptional power density, ultralight weight, and cost efficiency. They are widely utilized in medical diagnostic systems, compact industrial automation control panels, telecom equipment, and embedded computing systems where spatial volume is strictly constrained.

What is a U-Channel Power Supply?

A U-Channel Power Supply features components mounted inside a U-shaped aluminum chassis. This U-metal frame serves dual functions: acting as a robust mechanical barrier protecting internal componentry and functioning as a highly efficient conduction heat sink.

By transferring heat from switching MOSFETs, rectifiers, and transformers directly to the aluminum U-frame, engineers can mount the chassis against an external metal wall or cold plate. This enables fanless conduction cooling, making U-Channel power units ideal for high-vibration, sealed, dust-prone, or noise-sensitive industrial environments.

Continuous Innovation

We know well that only by constantly innovating can we maintain a leading position in the fierce market competition. Therefore, we launch 2-3 new models of power supplies every month. These new products have not only been optimized and upgraded in terms of performance, but also deeply expanded in terms of functionality and applications. Our R&D team keeps up with industry trends, combines market demand, and constantly explores new technologies and applications to ensure that each new product can provide unique value to customers.

Quality Assurance (QA)

All of our products are engineered to meet worldwide safety standards. Quality and process control is insured using a variety of statistical sampling and analysis techniques throughout the manufacturing cycle. In addition, all products should pass a rigorous burn-in and fully automated final test before shipment. We have two production bases, one is in Shenzhen and the other is in Dongguan, with timely delivery.

Custom Design Service

Furthermore, Huyssen Power also offers the design service in order to meet customers' special requirements. If you can't find a suitable model from our catalog, our experienced R&D team can design a custom-made power supply to meet your needs. With over 22 years of R&D design experience in the power supply industry, we offer a total solution for you and would like to become your long-term power partner.