AHA500FB-191R

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Chassis Mount Resistors are components built to latch or clip onto the sides of a metal panel or frame, this allows them to efficiently dissipate heat from inside the panel, or frame. These resistors are designed to take the impact of high temperature and high shock/vibration environments, while still maintaining their power rating.

The AHA500FB-191R is a Chassis Mount Resistor from American Hoffman; it is part of the 500ohm range of resistors, and the identifying suffix ‘191R’ is added to help differentiate it from other part numbers. It has a robust construction, with a resistant to corrosion, and a high temperature (>125℃) capability.

The housing of this component is made of stainless steel, with a ceramic center. This is designed to ensure a good thermal transfer path between the heat source and the surrounding environment. The resistor element is a high-quality deposited resistor element, and is fused to the inside of the stainless housing. It provides a relatively low total power rating of 1 watt, and an operating voltage of up to 500 volts.

The AHA500FB-191R has a variety of applications; it is often used as a clamp-on resistor in the reflow ovens of electronic manufacturing, to ensure even heat transfer and flux distribution during tinning processes. Additionally, it can be used as a voltage divider circuit, to send a signal at a fraction of the input voltage to an electronic circuit.

The working principle of this resistor is also based on its resistance to electrical current flow. Its resistance depends upon the material of the resistor element, and the physical characteristics of the resistor itself. For instance, if the temperature of the resistor element is increased, its resistance to electrical current flow will also increase. Similarly, if the voltage across the resistor increases, its resistance will also increase.

When a voltage is applied to this resistor, the resistance to electrical current flow will be the product of the voltage divided by the current, meaning that an increase in voltage will lead to an increase in the electrical current. This current will then flow through the resistor element, generating heat. This heat is then conducted outwards through the stainless housing to the external environment.

The AHA500FB-191R is a versatile and reliable Chassis Mount Resistor, which is available in many sizes and resistance levels. It is an excellent choice for high-temperature and high-current applications, such as those in reflow ovens. Its robust construction, corrosion resistance, and high temperature tolerance all make it one of the most reliable resistors on the market.

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