M39003/01-3085H

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The M39003/01-3085H is a subminiature, molded, axial-lead, low-inductance recovery diode-capacitor used in suppressing positive voltage transients. Commonly referred to as a Tantalum Capacitor, M39003/01-3085H capacitors have a low dissipation factor and high capacitance values compared to ceramic capacitors, making them ideal for high frequency switching applications, where high current and voltage stability are essential.

M39003/01-3085H capacitors are constructed of two sheets of embossed tantalum foil, with plastic film separators between each layer. The connection leads are contoured to provide mechanical strain relief, allowing for multiple mounting configurations. The electrolyte is typically of the manganese dioxide type, which ensures the capacitor remains stable during high temperature operation and is highly reliable over time. The range of M39003/01-3085H capacitors includes standard values from 10µF to 470µF.

When selecting a capacitor for a given application, it is important to consider the working voltage, the working temperature, as well as the load conditions and other environmental factors, such as temperature, humidity, and vibration. The maximum operating temperature for the M39003/01-3085H is 85°C, and its maximum DC working voltage is equal to its ripple voltage rating multiplied by 1.3. In order to increase the effectiveness of these capacitors, they are typically utilized in an expanded-ratio series circuit, where the parallel resonance frequency is reduced and the impedance of the capacitor is increased.

M39003/01-3085H capacitors are most commonly used in the suppression of transient voltage spikes, such as those caused by load inversion, interference, or improper supply voltages. The capacitor is also suitable for motor, audio, and lamp protection, power buses, and high frequency circuits. Additionally, they are used in RF and microwave systems, in power supplies, and in semiconductor switching applications.

When utilizing M39003/01-3085H capacitors, it is important to consider the self-heating effect of the capacitor; as the capacitor draws current, the temperature of the device increases, resulting in voltage deviations. To prevent this from occurring, the capacitor should be allowed to cool between cycles, or should be derated to ensure the maximum allowable temperature is not exceeded.

In conclusion, M39003/01-3085H capacitors are a reliable and versatile component, providing outstanding performance in various applications. As a Tantalum capacitor, they are highly stable, capable of withstanding high-temperatures and large voltage transients. Their low dissipation factor and high capacitance values make them an excellent choice for high frequency applications, and thanks to their simple installation, they are a cost effective option for numerous applications.

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