New 50W and 75W PCB-type AC-DC power supplies

TDK-Lambdavisit website


TDK-Lambda UK is extending the reach of its ZWS-BAF series PCB-type AC-DC power supplies by adding two lower-power models. The 50W ZWS50BAF and 75W ZWS75BAF combine high efficiency, even at low-load conditions, with a wide operating temperature range, small size and up to ten-years electrolytic capacitor life. TDK-Lambda says this reinforces its competitive advantage in the general industrial equipment market.

As with all models in the ZWS-BAF series, the new low-power models have active power factor correction and high input transient and surge protection to IEC 61000-4-4,5; they operate from a universal input of 85-265V AC or 120-370V DC to meet a wide range of applications, including factory automation, test and measurement, and LED signage. Offered with a choice of output voltages from 3.3--48V, models in the ZWS-BAF series can be adjusted by up to +/-10 per cent of their nominal voltage to accommodate non-standard system voltages.

Small in size and offering an efficiency of up to 88 per cent, which is considered high for a PCB-type AC-DC power supply, all models in the ZWS-BAF series feature an operating temperature range of -10 to 70degC, allowing 100 per cent load operation in 50degC environments. Standard features include over-current and over-voltage protection circuitry, and an optional remote on/off is also available.

With active power factor correction (PFC) that meets EN 61000-3-2, the ZWS-BAF models have 3kV AC input-to-output isolation and conducted and radiated EMC performance complies with the specifications in EN 55011, EN 55022-B, FCC-B, VCCI-B. They are delivered with TDK-Lambda's five-year warranty, are safety-approved to UL/CSA/EN 60950-1 and EN 50178, and are CE marked to the Low Voltage Directive.

For more information about the ZWS-BAF series, including a datasheet, call TDK-Lambda directly on +44 (0)1271 856600 or go to

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