Fanless AC/DC Switching Power Supply delivers 200-400 W.

Press Release Summary:

Providing up to 400 W of continuous power with convection cooling, Protek Power PUB200/250/300/400 Series features 7.93 x 4.13 x 1.59 in. perforated metal case, terminal strip connection for facilitated installation, and universal 90–264 Vac input. Single output options are available, operating range is 0° to +70°C, and efficiencies reach up to 94%. Along with ±0.5% max line regulation at full load, RoHS-compliant products feature over-voltage, over-current, and over-temperature protection.

Original Press Release:

AC-DC Switching Power Supply Fanless Design Provides Up to 400 Watts of Power

Wrentham, MA — Power Sources Unlimited, Inc. announces the PUB200/250/300/400 Series of AC-DC  switching  power supplies that are capable of delivering 200-400 Watts of continuous power at convection cooling to our Protek Power portfolio. They are the ideal solution for industrial applications including but not limited to automation, process control and system control.

The PUB Series are housed in a small 7.93” x 4.13” x 1.59” perforated metal case for cooling and feature a terminal strip connection for simplicity of installation. Features include universal input range of 90-264VAC with single output options, wide operating temperature of 0-70°C, line regulation ±0.5% maximum at full load, and operating efficiencies up to 94%. Compliant with EN 55022 and FCC Class B emissions, offer active PFC to meet IEC 61000-3-2 Class A and D. Comprehensive protection circuitry against over-voltage, over-current and over-temperature is inherent in the design. All units are RoHS compliant.

Pricing starts under $50.00 - $80.00 depending upon the output wattage in OEM quantities. Prototype quantities are available in 2 weeks. PSUI is an ISO 9001:2008 North American Authorized Distributor for Protek Power North America.

Download full specifications and procure parts online at For sales or applications inquiries, please contact Power Sources Unlimited, Inc. toll free at 800-966-PSUI(7784) (USA only) or 508-384-1419 or email

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