The ZW-09-11-L interconnect series from Samtec is a through-hole board stacker header designed for robust electrical connections between PCBs. These headers are commonly found in industrial control panels, server racks, and other applications where multiple boards need to be stacked together and connected reliably under harsh conditions. They offer a simple yet effective way to manage signal and power distribution between stacked PCBs.

One thing worth noting is that these headers provide excellent mechanical stability due to their through-hole design, which helps prevent misalignment and ensures consistent contact even when boards experience vibration or thermal expansion. Engineers tend to reach for this when they need a reliable, high-density connection solution without the complexity of surface-mount technology. Another practical advantage is their ease of installation; the through-hole nature means they can be soldered directly into the PCBs, streamlining the assembly process.