Difference Between Tantalum And Ceramic Capacitors

Engineers now have a choice between ceramic and tantalum when it comes to selecting capacitors with values between 0 1 22µf.

Difference between tantalum and ceramic capacitors.

A molded tantalum capacitor top and a microchip style tantalum capacitor bottom ceramic capacitors. Ceramic capacitor vs tantalum capacitor. Ceramic capaci tors constructed with these dielectrics offer moderate dielec tric constants with moderate temperature and voltage sensi tivities. Tantalum capacitors can be used as coupling and the frequency range of such circuits as filter oscillatory bypass is large while ceramic capacitors are mostly used in high frequency circuits.

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. The dc working voltage of tantalum chip capacitors is limited to between 4 v and 50 v. Tantalum capacitors configured with electrodes on the bottom of the package are not susceptible to shorts even when mounted close together facing each other. Tantalum capacitors and ceramic capacitors also have different uses.

No piezo electric properties that may result in circuit noise. Tantalum are low voltage devices suitable for computer and power supply applications. Comparison of multilayer ceramic and tantalum capacitors by jeffrey cain ph d. Ceramics can withstand high voltage and high frequency applications so they are quite common in radio equipment.

This is significantly less in ceramic capacitors than in tantalums 0 001 μa compared to 0 5 30 μa. They overlap with tantalum capacitors in capaci. A ceramic cap is a disc type that has a piece of ceramic wafer between the plates. Tantalum capacitors are polarized devices so correct polarity must be maintained on the pc board.

Higher esr than ceramics. High and stable capacitor values that are not affected by applied voltage. Surface mount tantalum capacitors typically feature a bottom electrode structure. Depending on the application the capacitor type is chosen.

Figure 2a 2b. Ceramic chips are rated from 6 3 v to 200 v with others up to 5 kv. Tantalum electrolytic capacitors can achieve a small capacitance while the ceramic capacitor can hardly achieve the ideal performance when the capacitance is large. Basic differences ceramic capacitors have a multitude of dielectric types available and each of these types is characterized by their sensitivities to temperature but not to voltage or time.