Difference Between Tantalum And Ceramic Capacitors

Tantalum capacitors are polarized devices so correct polarity must be maintained on the pc board.

Difference between tantalum and ceramic capacitors.

Tantalum capacitors configured with electrodes on the bottom of the package are not susceptible to shorts even when mounted close together facing each other. High and stable capacitor values that are not affected by applied voltage. A tantalum cap is a form of dry electrolytic cap. The dc working voltage of tantalum chip capacitors is limited to between 4 v and 50 v.

Figure 2a 2b. Ceramic capacitor vs tantalum capacitor. Depending on the application the capacitor type is chosen. The difference between tantalum capacitors and ceramic capacitors is that under the same capacity tantalum capacitors have a much smaller volume and tantalum capacitors have lower esr than electrolytic capacitors have a longer life and are resistant to high temperatures.

Tantalum electrolytic capacitors can achieve a small capacitance while the ceramic capacitor can hardly achieve the ideal performance when the capacitance is large. This paper compares the x7r x6s or x5r dielectric types of ce ramic capacitors with tantalum capacitors. Engineers now have a choice between ceramic and tantalum when it comes to selecting capacitors with values between 0 1 22µf. This is significantly less in ceramic capacitors than in tantalums 0 001 μa compared to 0 5 30 μa.

Tantalum capacitors and ceramic capacitors also have different uses. A ceramic cap is a disc type that has a piece of ceramic wafer between the plates. Ceramics can withstand high voltage and high frequency applications so they are quite common in radio equipment. Higher esr than ceramics.

They overlap with tantalum capacitors in capaci. In contrast to tantalum capacitors ceramic capacitors have less overall plate area and significantly thicker layers but compensate for such deficiencies by using dielectric materials with a much higher dielectric constant. No piezo electric properties that may result in circuit noise. Ceramic capaci tors constructed with these dielectrics offer moderate dielec tric constants with moderate temperature and voltage sensi tivities.

Tantalum are low voltage devices suitable for computer and power supply applications. A molded tantalum capacitor top and a microchip style tantalum capacitor bottom ceramic capacitors. Comparison of multilayer ceramic and tantalum capacitors by jeffrey cain ph d. Ceramic chips are rated from 6 3 v to 200 v with others up to 5 kv.