Ceramic Capacitor Max Current

Ceramic disc capacitors have two to three digits code printed on them.

Ceramic capacitor max current.

A ceramic capacitor is a fixed value capacitor where the ceramic material acts as the dielectric it is constructed of two or more alternating layers of ceramic and a metal layer acting as the electrodes the composition of the ceramic material defines the electrical behavior and therefore applications. I cd rms min 0 070a rms. Capacitors ceramic capacitors multilayer ceramic chip capacitors mlcc with dipped radial lead. What is the allowable ripple current of capacitors.

You can t put a sustained current thru a capacitor anyway. When the first two numbers are multiplied with the multiplier the resulting value is the value of the capacitor in picofarads. This note discusses the relationship of current handling power dissipation applied voltage and the maximum rated voltage of a multi layer ceramic capacitor. Ripple current of mlcc 1.

The rms values of the ripple currents of the capacitors are. Put another way current thru a capacitor is inherently ac. Most capacitors don t actually have a current rating since that doesn t make much sense. Either the maximum voltage rating or the maximum power dissipation of the part limits the maximum current through a capacitor.

When there is a fluctuation of voltage in a capacitor a charge or discharge current enters or leaves the capacitor in response to this. I ca rms max 3 206a rms. This capacitor s esr is 3 246mω at 400khz suggesting the ripple current is 6 86a which is below the maximum for the device. The first two numbers describe the value of the capacitor and the third number is the number of zeros in the multiplier.

Conclusion the issue of ripple current can be challenging to analyze and to predict accurately under expected circuit operating conditions. Using ceramic capacitors of different sizes in parallel provides a compact and cost effective way to filter large ripple current. Applicable to rated voltage of less than 100vdc the load should be contained to the level such that when measuring at atmospheric temperature of 25 c the product s self heating remains below 20 c and the surface temperature of the capacitor in the actual circuit remains within the maximum operating temperature. Ceramic capacitors are rarely if ever specified with a maximum current.

I cc rms min 0 306a rms.