The NC3FBH1 series from Neutrik AG is a set of female XLR connectors designed for PCB mounting, with a key feature being that the ground is connected to pin 1. This series is widely used in audio equipment, professional audio mixing consoles, and other high-fidelity audio systems where robust, reliable connections are crucial. If you're working on any project that requires a secure, professional-grade connection for balanced audio signals, these connectors are a solid choice.

One thing worth noting is the importance of proper grounding in audio systems. By having the ground on pin 1, these connectors help ensure a consistent and low-noise signal path. Engineers tend to reach for this when they need a dependable connection that can handle the rigors of live performances or studio recording without introducing unwanted noise or hum. Additionally, the PCB-mount design makes them ideal for installations where space is limited and a clean, professional look is desired.