TDK-Lambda ZWS-B series PCB-type AC-DC power supplies

TDK-Lambdavisit website


TDK Corporation is announcing the TDK-Lambda ZWS-B series printed circuit board type AC-DC power supplies – 30 per cent smaller, lighter weight and more efficient range of power supplies than the earlier generation ZWS series. Reinforcing TDK-Lambda’s ‘green’ product initiative, the ZWS-B series complies with the energy saving requirements of the ErP (Energy related Products) Directive, featuring a <0.5W no load input power. Suitable for use in a wide range of light industrial equipment and front-end equipment for broadcast and communications applications, the ZWS-B is also well suited for applications in indoor and outdoor LED signage and test & measurement.

Martin Southam, Director of Marketing for TDK-Lambda EMEA, says: “The ZWS-B series adopts a simple circuit design which reduces internal losses and achieves the smaller size. Boasting features such as wide input range and drastically reduced input power at no load conditions, the ZWS-B brings another addition to our world-class portfolio of ‘green’ power supplies.”

Available in three low-power models – the ZWS10B (10W), ZWS15B (15W) and ZWS30B (30W) – the ZWS-B series is a compact product that offers an efficiency of up to 86 per cent. In addition, the ZWS-B convection-cooled power supplies feature an operating temperature range of -10 to +70degC, allowing 100 per cent load operation in a +50degC environment and 70 per cent load at +60degC.

Operating from a universal input of 85–265V AC or 120 to 370V DC, the ZWS-B series is offered with a choice of output voltages from 3.3–24V. Each model can be adjusted by +/-10 per cent of its nominal voltage to accommodate non-standard system voltages. Standard features include over current and over voltage protection circuitry; options include remote on/off feature, L-plate or L-plate plus cover, conformal coating of the PCB and a fixed output voltage.

The ZWS-B series from TDK-Lambda meets the conducted and radiated EMC requirements of EN55011/EN55022-B, FCC-B and VCCI-B, as well as IEC61000-4-2, -3, -4, -5, -6, -8, -11 immunity and safety approvals to UL/CSA/EN60950-1 and EN50178 (OV II). Delivered with TDK-Lambda’s 5-year warranty, backed up with a 10-year electrolytic capacitor lifetime, the ZWS-B series carries the CE mark, according to the LV Directive. For more information about the ZWS-B series, please visit the website at

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