Wago 6mm terminal block awg 28 12 281 series wago 281 673281 411 wago 281 673281 411 6mm wide 3 conductor diode 250v terminal block circuit 2 colour grey for wire sizes awg 28 12 pack size 50 wago 281 673281 411 6mm 3 cond diode 250v t blk circuit 2 grey awg 28 12 50pk