Voltcraft fixed voltage switch mode power supply bench voltcraft fsp 1235 the voltcraft fsp 1235 is a 525w fixed voltage switch mode power supply suitable for use in laboratories workshops and industry the fsp 1235 is highly efficient and produces 11 to 15v dc and 35a with a current limiter the output voltage can be adjusted via the potentiometer on the psus underside its steel plate enclosure makes the fsp 1235 suitable for use even in demanding industrial conditions voltcraft fsp 123