Capacitor wet test voltage

How long does a wet tantalum capacitor test last?

Considering that wet tantalum capacitors operate at conditions close to breakdown, increasing voltage to more than 1.1VR might be risky. For this reason, stress voltage is increased to 1.1VR and duration of the test increased to 160 hours for level 1 parts and 96 hours for level 2 parts.

What is the difference between a wet and solid tantalum capacitor?

Thus, the solid tantalum capacitor needs a surface three times larger than that of the wet one for getting the same capacitance. The wet sintered tantalum capacitor also has the lowest leakage current of the electrolytics. It is comparable with that of paper capacitors.

How long should a capacitor be tested?

At these parameters of the model the acceleration factors are large, and a 96-hour testing of capacitors at 2 times rated voltage (VR) and 125 °C during voltage conditioning (a typical screening procedure) would be equivalent to testing at operating conditions (assumed 50 °C and 0.5 VR) to more than a thousand years of operation (see Figure 1).

What is a wet slug tantalum capacitor?

Wet slug tantalum capacitors are manufactured in a voltage range up to 150 VDC. In choosing between the solid or wet style of tantalum capacitor, the circuit designer customarily uses wet tantalum capacitors, where the lowest DC leakage is required. The conventional silver can design will not tolerate any reverse voltages.

Do tantalum wet capacitors need voltage derating?

Most of tantalum wet capacitors series do not require voltage derating when used below +85 °C. But DC working voltage (bias) should be chosen so that the sum of the DC bias and AC (ripple) voltages not to exceed the RV. For increased reliability it is recommended to have 10 % to

How accurate is a capacitor voltage measurement?

The accuracy of voltage measurements should be 1 mV or better. The resistors will have a value of 100 kOhm for capacitors less than 1 μF and 10 kOhm for capacitors of 1 μF or larger.