What Is a Network Resistor?
A network resistor is a composite component consisting of multiple resistors interconnected. This single component functions as multiple resistors, making it a practical choice in electrical and electronic circuits. Network resistors come in two main types: leaded types, consisting of discrete components connected with jumper wire legs, and surface-mounted types, comprising chip components designed for surface mounting.
Uses of Network Resistors
Network resistors are utilized in situations where multiple resistors of the same value are required within a circuit, such as in boards with various identical circuit configurations. They help in reducing the mounting area and overall board size, thereby enhancing circuit integration. Additionally, network resistors are cost-effective, as purchasing a single network resistor with multiple connected resistors is usually cheaper than buying the same number of individual resistors.
Principle of Network Resistors
Commonly, network resistors consist of multiple resistors connected in parallel. In the leaded type, thick film resistors are arranged in parallel. Each resistor has a common electrode on one side and a lead wire connection on the other, serving as the element terminal. The assembly is insulated with a glass coating and encased in outer resin, forming a unified component.
Some network resistors function as voltage-dividing resistors, with terminals emerging from between two series-connected resistors. For instance, a network resistor with a voltage divider function can halve a 10 V voltage to 5 V using just one element.
Variants with differing resistance values, such as 2x, 4x, and 8x, are also available. These are particularly useful in ladder circuits and similar configurations, significantly enhancing circuit integration while reducing costs.