Terminal Feed-Thru Blocks, Standard: Type - Standard Feed-Thru Terminal Block; Configuration/Wiring - Double Tier 2-Circuit 4-Wire; Construction Style - IEC; Rating - Voltage - 500V; Rating - Amps - 57A; Wire Range - 20-6 AWG; Model Type - UKKB 10/2 5; Wire Terminal - Screw; Housing Material - Polyamide 6.6; Housing Finish - Gray; Mounting - DIN Rail, 35mm; Block Width - mm - 10.2 mm; Block Width - in - 0.40"; Block Length - in/mm - 3.05/77.5; Manufacturer Series - UKKB Series