Bussmann lpj 600v ac300v dc 1 600a 57 203mm dual element time delay fuses bussmann lpj 7sp this time delay fuse from bussmann has been designed with an optional open fuse indication on select ratings see data sheets other features include the separate overload and short circuit elements providing time delay for sizing of high inrush loads linked with class j current limitation while selective coordination ratio of 21 within low peak fuse family prevents electrical shutdowns from