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CUI Inc VMS-C/VMS-C-CNF Open Frame Power Supply: The Powerful "Heart" of Medical Electronic Devices

Latest update time:2022-01-12
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For electrical engineers, AC-DC power supplies are commonly known and used power conversion devices. Their main function is to convert alternating current into direct current. For AC-DC converters, the most common use scenario in life is switching power supplies. Switching power supplies are widely used in many fields such as industrial electrical, network communications, and automation. A safe and efficient power supply system is a reliable guarantee for the operation of equipment.

In the design of medical products, the performance of the power supply, which is known as the "heart" of electronic equipment, plays a vital role in medical electronic equipment. In addition to outstanding power supply efficiency, package size, reliability and safety requirements are also important considerations. The overall requirements that medical AC-DC power supplies need to meet include major technical indicators such as safety, reliability, electromagnetic radiation and anti-interference. While ensuring the absolute safety of equipment operation, it must also have highly reliable product performance.

1Compact design, suitable for medical applications

CUI Inc is focused on improving the design experience of design engineers. CUI Inc offers a variety of AC-DC power supplies, DC-DC converters, and power filters, among which the newly launched VMS-C and VMS-C-CNF are typical medical power supplies. These products feature a compact design and can be used in small spaces to meet the application requirements of medical AC-DC power supplies. VMS-C and VMS-C-CNF have a universal wide input voltage range of 85V AC —264V AC , and a variety of voltage output stages such as 12V DC —48V DC , with a leakage current of less than 0.1mA, a standby power consumption of 0.5W, and an open design, making them ideal for medical and home healthcare applications such as ultrasound machines and medical beds.

2Wider temperature range, safe and reliable
The VMS-C and VMS-C-CNF power supplies can operate over a wide temperature range of −40°C to +70°C (+85°C for 100W/120W products) and feature active power factor correction, which significantly improves power quality and efficiency. In addition, the power supplies feature comprehensive overcurrent, overtemperature, and short-circuit protection to ensure safe and reliable operation of medical equipment.
3International certification, safe and secure

The VMS-C and VMS-C-CNF series are also certified for medical/domestic use and comply with 60601, 61558 and 60335 safety standards for Class I or Class II safety installations, making them suitable for use in medical applications, especially where low leakage currents of less than 0.1mA are specified. Power supplies play a key role in ensuring the safety of patients using medical devices and must comply with strict international standards.


With the continuous improvement of medical standards, more and more high-tech medical equipment is being widely used in various occasions. As an important part of medical equipment, medical power supply has more stringent requirements than other power supplies. There are many types of medical power modules on the current market, and the medical electronics industry is a special industry with very high performance requirements for power supplies. Only by choosing a high-quality medical power supply system can the safety of the human body and equipment be guaranteed. As a world-renowned power supply solution supplier, CUI Inc's efficient, safe and reliable medical AC-DC power supply will be a strong guarantee for the stable operation of medical equipment.


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