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Jumper wires, pre-crimped leads, and cables with terminal ends are all types of electrical interconnections used in applications requiring connection of two or more electrical components. These types of connections are used in a variety of industries including telecommunications, automotive, and consumer electronics.

Jumper wires are small gauge wires with insulated jackets and are used for connecting two or more points on a circuit board. The wires normally consist of insulated electrical conductors with stripped ends that are pushed into holes or onto tabs on the board. Once connected, the wires can be soldered into place for a more stable contact. Jumper wires are used in a variety of projects such as connecting two boards together, connecting circuit components, and connecting grounds.

Pre-crimped leads are factory-made electrical leads that come pre-crimped with a specific configuration. These leads are usually soldered onto both ends of a permanent connection and act as a permanent bridge between two components. Pre-crimped leads come in a variety of lengths and configurations depending on the application and are commonly used in telecommunications, automotive, and consumer electronics applications.

Cables with terminal ends are commonly used in consumer electronics applications and are wired between two circuit boards. These cables usually come with a female or male terminal end that has a wire crimped to it. The terminal end is then stuffed into the connector on the circuit board and secured with a crimp. This connection ensures a permanent connection between the two circuit boards. Cables with terminal ends can also be used to connect two separate components to one circuit board, such as a motor and temperature sensor to a circuit board.

The application field and working principle behind jumper wires, pre-crimped leads, and cables with terminal ends all depend on their purpose. In general, these electrical interconnections are used to form a permanent connection between two or more electrical components. Each type has its own advantages and disadvantages and should be carefully chosen based on the application to ensure a reliable connection.