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Jumper wires are flexible, low-voltage electrical conductors made up of wires and plugs that are used for a multitude of applications. In the past, due to the reliance on two-wire systems, jumper wires were typically constructed from stranded wire and plugs with screw ends. Whereas jumper wires in contemporary systems are more often made up of solid, insulated wires and plugs with crimp ends for greater flexibility and interconnectivity. Jumper wires are often used in bread board circuits, temporary wiring, test equipment, and data acquisition systems.Jumper wires are available in different lengths, sizes, and colors for easy identification and instant organization. Additionally, when used to create a particular circuit, they provide flexibility in connecting components as well as flexibility when reworking the circuit. For automated systems, jumper wires are often secured to their component or circuit pins using solder. In general, jumper wires are best suited for low-voltage, low-power electrical connections.

Pre-crimped leads (also known as crimp connectors) are wire terminations that are designed to provide reliable electrical connections with minimal time and effort. Pre-crimped connections conjoin wire to components and are able to withstand vibration, moisture, and other environmental variables. The most common application for pre-crimped leads is sensors, which require reliable electrical connections between the transducers and control systems. Pre-crimped connectors offer a multitude of advantages due to their various sizes, designs, and colors (which make them well suited for automated systems and circuit boards). Crimped leads are available with or without strain relief collars, which can provide protection from mechanical abuse and support long cable stretches. They are often used to facilitate high-speed connections and those in continuous motion, as they help to completely simplify the wiring process and reduce the time for assembly. Pre-crimped leads use simple tools for installation and feature tight tolerance control to ensure secure connections between components. As a result, pre-crimped leads are ideal in a variety of industries including; aircraft, automotive, medical, defense, military, and nuclear.