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Through Hole Resistors

Through hole resistors are an essential component in many electrical and electronic circuits. They provide an electrical resistance and can be used to balance out undesired currents or dissipate heat created by the circuit. ELITECC Electronics\' CMF70250R00DEBF is a small size high-voltage metal-film resistor for through hole applications. We will discuss in detail its application field and working principle.

CMF70250R00DEBF Application Field

The CMF70250R00DEBF has a high withstanding voltage rating (up to 500V) and is suitable for AC/DC power circuits. It carries an operating temperature range of -55 °C to 155 °C and offers excellent stability against environmental effects on electrical system performance. Thus, it is suitable for automotive, industrial, instrumentation, renewable energy, medical, and other fields where stability and precision are required.

Typical applications for the CMF70250R00DEBF are resistive elements in power supplies, voltage dividers, bleeder elements, sensors, and more.

CMF70250R00DEBF Working Principle

The CMF70250R00DEBF is a carbon-film metal-oxide resistor with an Ohm value specified by its resistance rating. Resistance is generated by a thin layer of metal-oxide film coated onto an insulating substrate, such as ceramic or glass, and then wrapped around with a wire or ribbon of metal that contacts the substrate. It is then encased in a rectangular plastic housing.

When current passes through the resistor, it is impeded by the metal-oxide film, resulting in a voltage drop and power dissipation. The amount of resistance generated and the amount of voltage drop and power dissipation depend on the thickness of the metal-oxide film and the resistance rating of the resistor.

The CMF70250R00DEBF has a TCR (temperature coefficient of resistance) of 100 ppm/K, which means that its resistance value will change with changes in ambient temperature. The resistance value will increase as the temperature increases (positive temperature coefficient) or decrease as the temperature decreases (negative temperature coefficient). This ensures the stability of the resistor in temperatures conditions.

Conclusion

The ELITECC Electronics CMF70250R00DEBF is a high-voltage metal-film resistor designed for through hole applications in DC/AC power circuits. Its application field includes automotive, industrial, instrumentation, renewable energy, medical, and more. Its working principle is based on a metal-oxide film that impedes current passing through the resistor, causing a voltage drop and power dissipation, which depends on the thickness of the film and resistance rating.

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