350W convection cooled power supply is certified for quiet medical and audio use

May 21, 2016 // By Nick Flaherty
The CUS350M quiet convection cooled 350W power supply
TDK-Lambda has launched a range of 350W AC-DC power supplies for ultra-quiet designs in medical and professional applications.

The CUS350M series has both medical and ITE certification to the IEC 60601-1 and IEC 60950-1 regulatory standards and do not need forced air for cooling so are suitable for applications where audible noise cannot be tolerated, including hospital, dental, broadcast and professional audio equipment.

The power supplies can operate from an 85 to 264Vac input, and are initially available with 12V, 18V, 24V or 48V nominal outputs. With efficiencies of up to 94%, the CUS350M meets the ErP Directive with an average efficiency rating of greater than 87% and a stand-by power consumption of less than 0.5W. Less internal waste heat allows the product to conservatively operate at full power in -20ºC to +40ºC ambient temperatures, and up to +70ºC with derating.

The supplies measure 190mm x 87mm, with a height of 40mm for 1U rack mounting. The preferred “/F” suffix models have a 5V 0.5A standby output, an auxiliary 12V 0.3A output, remote sense, remote on/off and an isolated DC good signal. The input to output isolation is 4KVac (2 x MOPPs), with 2KVac from input to ground (1 x MOPP) and 1.5KVac (1 x MOPP) from output to ground. Safety certifications include IEC/EN 60601-1, ANSI/AAMI ES 60601-1 and IEC/EN/US 60950-1 with CE marking for the Low Voltage and RoHS2 Directives. The units also comply with EN 55011-B, EN 55022-B and FCC Class B for conducted emissions (Class A radiated) and meet the IEC 61000-4 immunity standards.

www.de.tdk-lambda.com/cus350m