Feed-Thru Blocks, With Internal Component: Type - Surge Suppressor Terminal Block; Component Rating - 12A; Configuration/Wiring - Double Tier 4-Wire; Rating - Voltage - 12VDC; Rating - Amps - 12A; Wire Range - 24-12 AWG; Model Type - TT-UKK5-D/12DC; Wire Terminal - Screw Clamp; Housing Material - Polyamide 6.6; Housing Finish - Black; Mounting - DIN Rail/G-Profile Rail; Temperature Rating - max - 85 deg C 185 deg F; Temperature Rating - min - -40 deg C -40 deg F; Block Width - 0.24" 6.2mm; Block Height - 2.67" 68mm; Block Length - 3.14" 80mm; Additional Information - Disconnect Knife in the Upper Level, Mounting on NS 32 or NS 35/7.5, Closed Housing; Manufacturer Series - TT Series