The PJ-102B series from Shenzhen Oneic Microelectronics Co., Ltd. consists of through-hole (THT) sockets designed for connecting DC mains power. Specifically, the PJ102BH variant features a horizontal orientation with a 5.5mm outer diameter and a 2.5mm inner diameter pin configuration, making it ideal for male connectors. These components are commonly found in power supplies, battery chargers, and other electronic devices that require a secure connection to a DC power source.

If you're working on a project involving power distribution boards or power supply units, these sockets can be a reliable choice. They provide a straightforward way to connect your circuit to a wall outlet or a battery without the need for additional wiring or conversion. One practical observation is that these sockets often come with a robust design, which helps prevent accidental disconnection and ensures a secure power connection. Engineers tend to reach for this type of component when they need a simple yet effective method to handle mains power distribution in their designs.