"JN4L4003MH (Vertical Connection Kit for MCCB up to 400A) The JN4L4003MH is a high-performance connection kit, specially designed for MCCB panel boards handling heavy electrical loads up to 400A. Category: Electrical Panel Connection Kit Current Rating: Up to 400A Adjustable Range: Fixed Connection for Vertical Busbars Short Circuit Capacity: 36kA Voltage Rating: 230/400V AC Material: Reinforced copper conductors with heat-resistant insulation Application: Designed for MCCB-equipped panels in high-demand industrial settings. Provides optimized electrical connectivity with minimal power loss. Used in large-scale power distribution systems, industrial plants, and data centers."