1000VDC LPSM FUSEHOLDER 1-POLE. The LPHV midget fuse older series is a touch-safe design providing protection to personnel when installing and removing fuses. The compact fuse holder mounts quickly onto 35 mm din rail decreasing panel layout and assembly time. It has been self-certified to stringent Littelfuse standards for applications upwards of 1000VDC. They are available in 1, 2, 3 pole configurations or can be connected together with an assembly kit. Applications: Combiner boxes, Photovoltaic Inverters LPHV is ideal for isolating photovoltaic module strings during maintenance, but is not designed for load break.