TRJD226M020RRJ

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Tantalum capacitors are the integral components in a wide range of electronic equipment. TRJD226M020RRJ is one of the most common used types among the Tantalum capacitors family. This section will discuss its product specifications, application fields, and working principle.

Product Specifications

The product name TRJD226M020RRJ is actually an acronym for:

• TR – For tantalum capacitors wet (molded) case
• J – For a cylindrical molded case
• D – For a 7.3mm body diameter
• 226 – This is the capacitance in microFarad (uF), i.e. 22µF
• M – For ±20% tolerance from the nominal capacitance.
• 020 – This is the rated voltage of the device, denotes the working voltage at 20V
• RRJ – This is the termination type, signifying automotive grade J-Lead.

The typical case size of the TRJD226M020RRJ is φ7.3×8.3mm. This class of tantalum capacitors is also available in the following capacitance values: 10uF, 22uF, 47uF, and 68uF, both with the same voltage rating of 20V, and same termination and case styles.

Application Fields

TRJD226M020RRJ is mainly applied in automotive electronics, such as car radios, DVD players, GPS devices, airbag systems and car immobilizers. Being automotive grade, these capacitors are designed and manufactured to resist vibrations and shocks, to have a wide temperature range coefficients, and to last during tough conditions, such as in temperature, humidity and pressure changes.

Additionally, TRJD226M020RRJ is also applicable in toys, computers, and various industrial and commercial apparatus.

Working Principle

The TRJD226M020RRJ is a polarized, non-electrolytic type of capacitor consisting of two electrodes, the anode and the cathode, separated by a dielectric layer of tantalum material (mixed with oxides).

The anode is made from a sintered Disc of pure sintered tantalum powder and the cathode is a thin tantalum oxide layer deriving from the anode material as is formed during the anode’s manufacturing process. The oxide layer, which acts as the dielectric layer, can be further reinforced with an additional oxide coating. The two conductors are connected to two leads, an anode lead and a cathode lead.

The working principle of the TRJD226M020RRJ is based on the capacitance between two electrodes, giving the abiluty to store electric energy in the electrostatic field between them. In this specific case of Tantalum Capacitor, a flow of current is allowed to pass or block depending on its polarity.

Conclusion

The TRJD226M020RRJ is one of the most widely used models of Tantalum capacitors, widely used in automotive and commercial electronics, due to its highly robust construction and conformability to temperature, humidity, and vibration extremes. Its application comes down to its working principle, based on the capacitance between two electrodes, enabling it to store electric energy.

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