Terminal Block, Fused, 20mm, 1W - 

The 503SI01 is a 1-pole Fused Terminal Block barrier strip without earth and protectors, made up of brass and tinned insert and M3 steel, zinc plated and chromed screws. The 503SI series fused terminal blocks are available in unearthed versions from 1 to 5 poles and earthed versions from 3 to 5 poles. A common dovetail enables mixed assemblies to be constructed by clipping on additional 1 pole lengths to provide multiple versions of fused and unfused terminals.