Harting har-flexicon® 2.54mm PCB Terminal Blocks Brought to you by Harting, these har-flexicon® 2.54mm mini I/O PCB SMT pluggable terminal blocks are for the rapid termination of single wires. These har-flexicon® pluggable terminal blocks have push-in spring-cage terminals that accept a wire size of 24 to 20 AWG. The terminal blocks also feature tin plated 6A contacts, and are available with a vertical or horizontal orientation. har-flexicon® PCB SMT pluggable terminal blocks are ideally suited for providing a link between the periphery and printed circuit boards in industrial devices.