Vigortronix ac dc power supplies with 3w single output vigortronix vtx 214 003 109 this ac dc 4 pin power supply with 3w single output from vigortronix is a 9v transformer manufactured for use in applications where space is limited thanks to the encapsulated design of the module which features a built in transformer weighing just 30g this pcb transformer is not only cost effective but also boasts a host of excellent features such as the prisec full isolation low standby power lt0