Chassis mount resistors are electronic components that are used to limit the flow of current in a circuit. They are mounted on a chassis or a heat sink to dissipate heat generated during operation. Chassis mount resistors are used in a wide range of applications, including power supplies, motor control, and audio amplifiers. In this article, we will discuss the mainstream models of chassis mount resistors.

1. Wirewound Resistors

Wirewound resistors are the most common type of chassis mount resistors. They are made by winding a resistive wire around a ceramic or fiberglass core. The wire is coated with a layer of insulation to prevent it from coming into contact with other components. Wirewound resistors are available in a wide range of resistance values and power ratings. They are highly reliable and can withstand high temperatures.

2. Thick Film Resistors

Thick film resistors are made by depositing a resistive material on a ceramic substrate. The resistive material is then covered with a layer of protective material. Thick film resistors are less expensive than wirewound resistors and are available in a wide range of resistance values and power ratings. They are also smaller in size and can be mounted on a PCB.

3. Thin Film Resistors

Thin film resistors are made by depositing a thin layer of resistive material on a ceramic substrate. The resistive material is then covered with a layer of protective material. Thin film resistors are more precise than thick film resistors and have a lower temperature coefficient of resistance. They are also more expensive and are used in applications that require high precision.

4. Metal Film Resistors

Metal film resistors are made by depositing a thin layer of metal on a ceramic substrate. The metal layer is then covered with a layer of protective material. Metal film resistors are more precise than thick film resistors and have a lower temperature coefficient of resistance. They are also more expensive and are used in applications that require high precision.

5. Carbon Film Resistors

Carbon film resistors are made by depositing a thin layer of carbon on a ceramic substrate. The carbon layer is then covered with a layer of protective material. Carbon film resistors are less expensive than metal film resistors and are available in a wide range of resistance values and power ratings. They are also less precise and have a higher temperature coefficient of resistance.

6. Power Resistors

Power resistors are designed to handle high power levels. They are available in wirewound, thick film, and metal film configurations. Power resistors are used in applications that require high power dissipation, such as power supplies and motor control.

7. High Voltage Resistors

High voltage resistors are designed to handle high voltage levels. They are available in wirewound, thick film, and metal film configurations. High voltage resistors are used in applications that require high voltage handling, such as power supplies and audio amplifiers.

8. Fusible Resistors

Fusible resistors are designed to act as a fuse in a circuit. They are available in wirewound and metal film configurations. Fusible resistors are used in applications that require protection against overcurrent conditions.

In conclusion, chassis mount resistors are an essential component in electronic circuits. They are available in a wide range of configurations, including wirewound, thick film, metal film, carbon film, power, high voltage, and fusible resistors. The choice of resistor depends on the specific application requirements, such as resistance value, power rating, precision, temperature coefficient of resistance, and voltage handling. It is important to select the right resistor for the application to ensure reliable and efficient operation.