1, Maximum Voltage: 250Vac/dc, Maximum Current Rating 40A(per channel). 2, Input terminals(A, B): pitch - 7.62mm/0.3", current 30A for per position(total 40A for A or B channel), wire size 26~10 AWG / 4.0mm square, stripping length 8mm, Metric M3 slotted screw. 3, Output terminals(A1~A16, B1~B16): pitch - 5.08mm/0.2", current 16A for per position(total 40A for A or B channel), wire size 28~12 AWG / 2.5mm square, stripping length 7mm, Metric M2.5 slotted screw. 4, FR-4 fiber glass PCB, dual copper layers. 5, Taiwan High quality fireproof nylon material mount carrier(not China low quality carrier). Also included are two M3 x 10mm wood screws, you can easily mount it on a wooden board.