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Chassis Mount Resistors

Chassis mount resistors are, as implied, resistors designed to be mounted to an electrical chassis for a variety of applications. These resistors typically come in package styles such as axial, radial, transistors, and various mounting styles like PCB, DIN or chassis mount. Examples of chassis mount resistors are the AHA500FB-825R.

AHA500FB-825R

The AHA500FB-825R is a chassis mount resistor package with an efficiency rating of up to 14 Watts. This wattage makes it a viable alternative to some of the much larger and more bulky radial resistors, which is of particular use in situations with power or budget constraints. Additionally, the chassis mount form of this resistor facilitates easier installation, as well as decreased footprint in many applications. The AHA500FB-825R is a surface mount resistor with an operating temperature range from -40°C to +125°C. They are also offered in a variety of resistance values between 0.1 and 0.6 ohms.

Application Fields and Working Principle

The AHA500FB-825R is most commonly used in industrial and audio/visual applications. Specifically, chassis mount resistors are suited for use in applications such as automotive, semiconductors, high power tools, power supplies, lamp drivers, DC motors, and lighting systems. In general, design engineers use chassis mount resistors to provide precise control in electrical circuits. By changing the resistance value of the resistor, engineers are able to control the voltage, power consumption, and current in the circuit. The greater the resistance value of the resistor, the greater the impedance, and the less current the resistor will allow to pass through. Conversely, the lower the resistance of the resistor, the lower the impedance, and the more current will pass through it.

The working principle of resistors is based on Ohm’s Law, which states that the voltage or current can be calculated by multiplying the resistance of the resistor by the current passing through it. This means that the power consumed by a resistor can be calculated by taking the square of the current multiplied by the resistance. This is why the wattage rating of a resistor is pertinent during the selection process for an application. Combining this working principle with the chassis mount features of the AHA500FB-825R resistor package allows for an efficient and cost effective solution in many applications.

Conclusion

The AHA500FB-825R chassis mount resistor package, due to its wattage rating, form factor, temperature range, and common application fields, lends itself to a wide variety of projects and applications. It is a cost-effective and efficient solution that allows for precise control in electrical circuits as it can change the resistance value, voltage, current consumption, and ultimately, the power dissipation of the device via Ohm’s Law.

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