The 1421123 is a power terminal block designed for high-current industrial power distribution applications, rated for 200 A at 600 V AC/DC per UL 1059 and CSA 22.2 No. 158 standards. It features 1/4-20 screw termination on both line and load sides with a short-circuit current rating (SCCR) of 10,000 A, phenolic insulator base with UL 94V0 flammability rating, and copper connectors with tin plating for reliable electrical contact. The terminal block operates across a temperature range of -40 °C to +150 °C (UL RTI), accepts listed compression/crimp lugs or ring, fork, and spade terminals, and is mounted with #10 fasteners using a maximum torque of 3.4 N·m. This terminal block is ideal for factory and field wiring in motor control centers, power distribution panels, and industrial control systems where robust, code-compliant high-current connections are required.