WAGO 280-637 3-conductor ground terminal block Brand: Wago. Part Number: 280-637. WAGO Terminal Block, 28 to 12 AWG Wire, 0.31 to 0.35 in Wire Strip Length, Through Terminal, DIN Rail Mount, Polyamide 6.6, Green/Yellow, 1.437 in H x 0.197 in W x 1.988 in D. Additional Description: WAGO-280-637 3-CONDUCTOR GROUND TERMINAL BLOCK; 2.5 MM ; CENTER MARKING; FOR DIN-RAIL 35 X 15 AND 35 X 7.5; CAGE CLAMP ; 2,50 MM ; GREEN-YELLOW GRND 51128398. Catalog Description: 3-conductor ground terminal block; 2.5 mm²; center marking; for DIN-rail 35 x 15 and 35 x 7.5; CAGE CLAMP®; 2,50 mm²; green-yellow..