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Tantalum capacitors are capacitor parameters formed from two electrodes which are made of tantalum oxide compressed oxide and two electrolyte solutions. Tantalum capacitors are generally small, chip-sized and their size ranges from 0.425 x 0.2 inches to 4.1 x 2.6 inches, making them a good choice for electronic circuit board applications.

The specific type TAJY477K004RNJ of tantalum capacitor is a surface mount type with high-ripple current, low-ESR and high-frequency characteristics. Particularly, TAJY477K004RNJ has an operating temperature range of −55°C to +125°C, with a capacitance of 47µF and a voltage rating of 4V. It also features a low ESR of 0.1Ω and a ripple current of 1.10A. TAJY477K004RNJ is tolerant to sustained reverse bias condition with its high temperature rating.

Application field of TAJY477K004RNJ

TAJY477K004RNJ tantalum capacitor is mainly used in various timing and filter circuits which require high frequency response over wide range of temperatures. Such application field can be found in consumer electronics, power supplies, computers, CD players, automotive electronics, instrumentation and medical equipment, etc. Due to its low ESR, it is especially suitable for timing and filter circuits that require high frequency and low voltage compensation characteristics.

Working Principle of TAJY477K004RNJ

At the heart of TAJY477K004RNJ tantalum capacitor is a tantalum oxide dielectric layer creating an insulating barrier between two electrodes. The electrodes are made of silver and nickel, respectively, which help deliver the electric current to the insulating layer’s surface. When voltage is applied to the electrodes, a reaction takes place between the positive and negative ions at the dielectric layer and a charge starts accumulating. The stored charge builds up between the electrodes and creates an electrical field to store energy. The capacitance is determined by the distance and area between the two electrodes.

One important characteristic of a tantalum capacitor is its high electrostatic capacitance density and its ability to withstand high temperature and voltage. The dielectric layer of tantalum is thin and compact, enabling the capacitor to achieve a compact profile for its size. Additionally, its high insulation resistance enables it to avoid leakage current and hence maintain the energy stored for longer periods of time.

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