To makes customer in using tantalum capacitor process in the encountered of problem for answers, our technology department personnel get has AVX original of technology support sector of assist, on tantalum capacitor of using for resolved, tantalum electrolytic capacitors to most stable of quality full played its performance, must with appropriate of method using, using Qian please first confirmed capacitor of using conditions and provides of performance, must comply with specifications book SHANG by provides of conditions, as using conditions not meet provides range or in is not provides of conditions Xia using, Please specify the conditions negotiated with the company.
Working voltage is the maximum voltage of the capacitors are designed to use. Because the highest voltage rating, any given voltage rated values meet the requirements of small product specifications. Capacitor failure effects by using the ratio of voltages, and the rated voltage is large. Tantalum capacitor failure rate is the DC rating (85 ° c, rated voltage) and conditions of use (such as ambient temperature and applied voltage, the circuit resistance) varies. In the actual circuit, due to the presence of electric current or voltage peaks of shocks and unforeseen circumstances such as ripple current, practical circuit design, please take into account the requirements of reliability due to lower voltages.
When using low-impedance circuit, set the voltage at nominal voltage below one-third when using other circuits, we recommend that you use rated voltage two-thirds voltage set up in the following.
When used in parallel in low impedance circuits, DC surge current will increase the risk of failure, but please note that shunt capacitors store electric charge through the capacitor discharge.
Tantalum capacitors in the circuit should be controlled instantaneous high current shock to capacitors, recommends that a series resistor to mitigate this impact. 3 ω/V more protection on a capacitor resistor in series to limit current 300mA or less cannot be inserted when a protection resistor, use the rated voltage one-third voltage. Tantalum capacitor is a capacitor polarity, polarity solid tantalum capacitors cannot be continuously applied reverse voltage. When in reverse polarity, leakage currents than the same forward voltage is much higher, which can lead to deterioration of the dielectric, the failure rate increases. So please do not impose a reverse voltage and are not available using only the AC circuit.
If the long-term use when in reverse circuits of capacitors, tantalum capacitors using bipolar, but not too high frequency only in the polar transform used in DC and pulsating circuits.
Non-solid electrolyte tantalum capacitor silver Shell cannot withstand reverse voltages.
Banned in principle of the tantalum capacitor with multimeter resistance gear on circuit or capacitor regardless of the polarity of the test itself.
During the measurement process, if they inadvertently put undue reverse voltage on the tantalum capacitors, please scrap the capacitor, even if its electrical parameters are still eligible. Capacitors used within the prescribed allowable ripple voltage. Applying excessive ripple current, ripple voltage, causes the tantalum capacitor failure.
When using DC bias and AC voltage peak value and shall not exceed the rated voltage of the capacitor.
Negative peak of AC and DC bias voltage and a negative value exceeds the allowable reverse voltage capacitors. Capacitors used within the specified operating temperature range.
Using temperature exceeds +85 ° c, please refer to Derating voltage working voltage.
Temperature is one of the main electrical characteristics of tantalum capacitors, so when temperature changes significantly, and please confirm its temperature is upper/lower limit circuit characteristics, please request technical information of different varieties. Frequency in the 10KHZ area, capacitor electrical characteristics change significantly, so when using the high-frequency circuit, make sure that the circuit characteristics, please request technical information of different varieties. Tantalum capacitor failure rate in accordance with their conditions of use (ambient temperature, applied voltage, the circuit resistance, circuits and other) differs, so after full discussion on the conditions of use, select the appropriate product.
When designing capacitors, at +85 ° c under rated voltage 1000 consecutive hours of failure rate as a benchmark, often exists in the actual circuit voltage or current spike on the anti-impact and ripple current to electric shock or other accidents, so the actual use of Derating design is necessary, recommends the General Derating below 65%VR.
When the device is for use with emphasis on security, used to prevent short circuit, open circuit and so on. Therefore, please be careful when you design these several points to ensure safety. A. Design protection, protection devices, system used to ensure safety. B. design of redundant circuits, making it an even when a single fault occurs, nor does it cause equipment failure as a whole system. When the capacitors mounted on printed circuit boards, if subjected to excessive mechanical shock or thermal shock load, causing degradation of electrical characteristics, short circuit, so please confirm the actual installation conditions before use.
Please note that when using, do not exert excessive force to make reality terminals or leads of the capacitor of the plating peeling off injury.
Cong falling or had installed a capacitor is used again.
Once installed, Cong or bend the Terminal for processing capacitor and so on.
Capacitor leads (including tantalum chip capacitor leads to end), measurement. avoid direct contact with the bare hand while in use, so as to avoid perspiration, grease and other pollution caused by poor solderability. When cleaning, please use when removing weld flux at the same time, quickly reduced to acid, alkali, do not give any residue, when temperature is below 50 ° c, ultrasonic, steam soaking in less than 5 minutes total time, please note that according to ultrasonic cleaning of different conditions, can cause Terminal broken. Use a soldering iron (30W), the tip of the soldering iron temperature below 260 ° c, use a time less than 10 seconds, met a capacitor and the soldering iron tip ontology. Tantalum chip capacitor, regardless of whether to hand soldering or reflow soldering, you should avoid using a high activity, acid flux, in order to avoid cleaning after dirty infiltration, corrosion and diffusion, which might affect its reliability.