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These AC-DC 4-Pin Power Supplies with 5W Single Output from Vigortronix are 3.3V transformers manufactured for use in applications where space is limited, thanks to the encapsulated design of the modules which feature a 'built-in' transformer.
Weighing just 35g, these PCB transformers are not only cost-effective, but also boast a host of excellent features, such as the Pri/Sec full isolation, low standby power (<0.15W), -40°C to +70°C operating temperature (full load) and low ripple/noise, while offering over power, over voltage and short circuit protection.