Voltcraft fixed voltage switch mode power supply bench voltcraft fsp 1204 the voltcraft fsp 1204 is a 60w fixed voltage switch mode power supply suitable for use in laboratories workshops and industry the fsp 1204 is highly efficient and produces 11 to 15v dc and 4a with a current limiter the output voltage can be adjusted via the potentiometer on the psus underside its steel plate enclosure makes the fsp 1204 suitable for use even in demanding industrial conditions voltcraft fsp 1204