AHA25AFB-348R

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Chassis Mount Resistors are an important part of a wide range of electrical systems. The AHA25AFB-348R is a Chassis Mount Resistor, and is suitable for a variety of applications due to its high-temperature performance, reliable operation and robust design. In this article we will look at the AHA25AFB-348R application field and working principle.

The AHA25AFB-348R is classified as a chip-mounted resistor, due to its composite construction; a rigid AlN substrate with sputtered resistance material is securely held within a two-part frame, which is then potted within the chip. This construction results in a surface-mount (SM) resistor which is ideal for a range of chassis- mounted applications, such as automotive, industrial, consumer, telecom or medical applications where superior electrical and thermal performance is required.

Within the automotive field the AHA25AFB-348R is suited for powering high side loads, such as DC/DC converters, motor control motors, solenoids, motors, IC drivers, and high-accuracy analog circuits. It is also useful for providing power to low-side sensors and amplifiers, or in power delivery systems that require constant voltage or current. In addition, AHA25AFB-348R is particularly suited to applications where space is limited due to its ultra-compact design.

The AHA25AFB-348R is designed to provide a stable, reliable power delivery across its operating voltage range, with a power rating of up to 1.2A and a maximum voltage of 3.7V. It has a temperature coefficient of 0.0157%, which ensures its reliability and stability within a wide temperature range (-55 to +150⁰C).

The working principle of the AHA25AFB-348R is based upon Ohm’s Law, which states that voltage is equal to the product of current times resistance. In this case, the AHA25AFB-348R is used to limit the current flowing through a resistor or circuit, creating a desired voltage. This is achieved through a series of precise resistive values that are designed to the specific temperature ranges required for a given application. By controlling the current passing through the device, it ensures stable performance and reliability even in very high-temperature environments.

Finally, the AHA25AFB-348R offers enhanced thermal performance, thanks to its advanced self-healing technology, which consists of a special blend of ceramic beads and metal particles that rapidly react to excessive heat and quickly repair any damage to the resistive coating. This ensures not only a far more reliable performance but also prolongs the lifetime of the device.

To summarize, the AHA25AFB-348R is a chip-mounted resistor that is ideal for a range of chassis-mounted applications, with a power rating of up to 1.2A and a maximum voltage of 3.7V. Its temperature coefficient of 0.0157% ensures it can operate reliably even in extreme temperatures, while its advanced self-healing technology helps to ensure its long-term reliability.

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