The J73KNA40 is an auxiliary contact block designed to expand the contact capabilities of J7KNA-AR series contactor relays. It provides four normally open (4 NO) contacts and no normally closed contacts. This module features a rated thermal current (Ith) of 10 A and has AC15 utilization category ratings of 3 A at 230V and 2 A at 400V. It is used to create more complex control logic and signaling circuits in industrial applications where additional status contacts are required.