This compact step-down DC-DC converter has an input voltage of 24 VDC nominal (range 20 VDC to 37 VDC) to a highly regulated output voltage of 12 VDC nominal at 5 Amps. This a non-isolated 5 amp DC-DC converter and is made for use in negative ground systems. These units have CE EN61000-6-3:2007+A1:2011 and CE EN61000-6-1:2007