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Chassis Mount Resistors

AHA25AFB-40R Application Field and Working Principle

The AHA25AFB-40R chassis mount resistor is a small, lightweight resistor that is designed to mount inside the chassis of an electronic device. This type of resistor is used in many different applications, from power supplies and motor control circuits to audio and visual systems. The AHA25AFB-40R utilizes a newly developed Airphen fuse that improves the safety, reliability, and performance of the resistor.

Design

The AHA25AFB-40R is designed to mount on a printed circuit board (PCB). The resistor measures 18.7 x 7.3mm and fits within a 0.1” grid on the PCB. It is designed with a resin case surrounding the Airphen fuse and seven resistive elements. Each resistor element is tuned to provide a specific resistance value. These seven elements come in a variety of values to provide the desired resistance for the given application.

Application

The AHA25AFB-40R is typically used in applications that require power conversion or voltage regulation. These applications include motor controllers, DC power converters, LED drivers, audio systems, and home theater systems. The seven resistive elements inside the resistor provide a range of resistance value that can be used in many power and signal applications. The AHA25AFB-40R is designed specifically to mount on a PCB in order to save on space.

Working Principle

The AHA25AFB-40R chassis mount resistors utilize a four-layerstructure. The first layer is the Airphen fuse, which is attached to the PCB by an epoxy adhesive. The second layer is the resistor element, which is made up of seven resistive elements. Each element is selected to provide the desired resistance for the application, and is connected to the PCB via a soldered connection. The last layer is the polyester film, which is used to provide insulation between the resistor elements and the PC board.

The resistor works by using the Airphen fuse to create a temperature-dependent voltage drop across the resistor elements. As the temperature increases, the voltage drop across the resistor elements increases, which causes the resistance of the resistor to increase. This temperature-dependent change in resistance allows for precise control of the voltage and current in the circuit.

The AHA25AFB-40R chassis mount resistor is a useful and versatile component that can be used in a variety of applications. Its small size and lightweight design make it easy to integrate into many systems and designs. The Airphen fuse provides improved performance and safety, while the seven resistive elements provide a range of resistance values and precise voltage and current control.

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