ENTRELEC 1SNK508960R0000 Compatible with fuse ZS4-SF1... and disconnect screw clamp terminal blocks ZS4-S-R3. Brand: ENTRELEC. Part Number: 1SNK508960R0000. TE, 1SNK508960R0000, Terminal Blocks, ES4-SF, Series: SNK, For Use With: Terminal Blocks and Strips, Polyamide, Dark Gray, 59 mm H x 1.5 mm W x 59 mm L Dimensions. Additional Description: TEC -1SNK508960R0000 ES4-SF End Section - Dark Grey 1SNK508960R0000. Catalog Description: Compatible with fuse ZS4-SF1... and disconnect screw clamp terminal blocks ZS4-S-R3...