The 1000uF 25v capacitor blows out in an AC 12V circuit

It has to do with the structure of your circuit and the conditions of use.

1. Filtering and voltage stabilization must be rectified first, and cannot be used under AC.

2 Usually 1000UF 25V capacitor is damaged by several factors: overvoltage, reverse connection, overheating (other components overheat to bake it hot).

3 7812 itself with overcurrent, overheating protection, it is bad The possibility is: overvoltage, the output voltage is higher than the input voltage, component quality problems (there is a problem with the quality of the components, and then the overcurrent is encountered, and the overheating will be broken) The maximum input voltage of 7812 is 35V, and your AC should consider whether the peak value exceeds 35V, otherwise the 7812 will be damaged, and the capacitor will be damaged by overvoltage after the 7812 breakdown.

The 1000UF 25 electrolytic capacitor 7812 is a DC device and cannot be used in AC. You need to add a rectifier bridge behind the 12V AC current, then connect the electrolytic capacitor, and then connect the 7812 voltage to direct current.

It is used as a filter circuit in an AC 12V circuit"

Is there a mistake in the description, if the 7812, filter capacitor works in an unrectified circuit, it must be bad.

If the circuit is indeed DC, it is likely that the voltage is too high, check it.

Used in AC 12V circuits, bad is normal!

Aluminum electrolysis is a polar capacitor and cannot be used in AC resistance, which is the minimum common sense of application!

Reverse voltage is usually not allowed, except at the moment of power on/off, load jump, etc., but not more than 1V!

The amount of electricity that can be stored in a 10000uf aluminum electrolytic capacitor is: coulombs. For a capacitor, if the potential difference between the two stages is 1 volt when the charge with 1 library theory is 1 volt, the capacitance of this capacitor is the 1 method, that is:

c = q u 1 farad (f) = 1000 millifara (mf) = 1000000 microfarf (f) 1 microfarf (f) = 1000 nanofara (nf) = 1000000 picomethod (pf).

The amount of current generated by the capacitor depends on the charging and discharging process of the capacitor. When the capacitor is in a discharged state, the current flows out of the capacitor, and the magnitude of the current depends on the speed at which the voltage of the capacitor decreases and the load in the circuit. In general, the discharge process of a capacitor can be calculated by the following formula:

1. i=c*δv δt where i represents the current, c represents the capacitance of the capacitor, δv represents the change of the capacitor voltage, and δt represents the time taken to change. Assuming that the capacitance of the capacitor is 10000uf, and the time required for the voltage to drop from 12V to 0V is 1 second, the current magnitude is: i=10000*10-6*(12v-0v) 1s=

2. Therefore, the current of the 12V10000UF capacitor is about during the discharge process. It should be noted that in the actual situation, the current failure of the electric inspection state or container is also affected by other components in the circuit, so it needs to be calculated according to the specific circuit situation.

Hello friend, let me answer for you the leakage current of 1000UF 25V capacitor should usually be controlled below 1mA. The leakage current of a 1000UF 25V capacitor is related to the quality of the capacitor, and generally speaking, the better the quality of the capacitor, the smaller the leakage current. In practical applications, the leakage current of 1000UF 25V capacitor should usually be controlled below 1mA, if the leakage current exceeds 1mA, it may cause adverse effects on the circuit, such as voltage drop, power cleaning and elimination circuit failure, etc., it should be noted that the leakage current of the electric refuge container will change with time, temperature and working voltage and other factors, so in practical applications, it is necessary to regularly detect and maintain the state of the capacitor to ensure its normal operation and use.

We are happy to answer for you, the leakage current range of a 1000 UF 25V capacitor mainly depends on the quality level of the capacitor and the temperature of the working environment. Generally speaking, the leakage current range of 1000 UF 25V capacitor is 3 5 A at the temperature of the stool; Under the standard temperature condition of -25 85, the leakage current range is 5 10 A; Under special temperature conditions of 0 125, the leakage current ranges from 6 to 14 A. Therefore, the leakage current of a 1000 UF 25V capacitor is in the range of 3 14 A.

It should be pointed out that the capacitor is ground before working and needs to be fully charged to achieve the best condition with the lowest leakage current. Therefore, for optimal performance, the capacitor should be subjected to more than 20 charge-discharge cycles.

Hello dear! I'm Xiao Guo, and I'm glad to answer for you! No, the capacitance and voltage of the capacitor are both very important, and if the capacitance is the same, but the voltage is different, it cannot be directly replaced.

In general, the voltage of the capacitor should be slightly higher than the highest voltage in the actual circuit. Therefore, if you need to use a 25V100UF electrolytic capacitor in your circuit, then you should not replace it with a 16V1000UF capacitor. If you use a sock or sell a capacitor with a voltage lower than the required voltage, this will force the capacitors to be forced by the voltage, causing them to fail prematurely.

To avoid this, you need to use a capacitor that matches the voltage required by the circuit. Therefore, it is recommended that you do not use capacitors with different specifications interchangeably, so as not to affect the normal operation of the circuit or the life of the capacitor. Kiss!

If I've helped you, please give me a thumbs up! Thanks!

Summary. This is because the voltage capacity of the capacitor must be greater than or equal to the voltage required in the circuit, otherwise the capacitor will burn out or damage other electronic components. In this case, the capacitance of the 25V 100UF electrolytic capacitor is 2500 μf, while the capacitance of the 16V 1000UF is 16000 μf, and the voltage capacitance does not match.

Therefore, 16V 1000UF cannot be used instead of 25V 100UF electrolytic capacitors.

Hello according to your problem description: 25V100UF electrolytic capacitor can not use 16V1000UF

This is because the voltage capacity of the capacitor must be greater than or equal to the voltage required in the circuit, otherwise the capacitor will burn out or damage other electronic components. In this case, the capacitance of the 25V 100UF electrolytic capacitor is 2500 μF, while the capacitance of the 16V 1000UF is 16000 μF, and the voltage capacity does not match. Therefore, 16V 1000UF cannot be used instead of 25V 100UF electrolytic defense pin capacitors.

If you are replacing the capacitor, make sure that the voltage level of the new capacitor (16V) is greater than or equal to the voltage level of the original capacitor (25V). In this case, you can replace the 25V 100UF electrolytic capacitor with a 16V 100UF electrolytic capacitor. Note that the capacitance of the capacitor (100uf) should be the same as the capacitance of the original capacitor.

If you use a different capacitor capacitance, it may affect the performance of the circuit.

Can a 25V100UF electrolytic capacitor use 16V1000UF?

If you are replacing a capacitor, make sure that the voltage of the new capacitor is equal to the voltage level (16V) of the original capacitor (25V). In this case, you can replace the 25V 100UF electrolytic capacitor with a 16V 100UF electrolytic capacitor. Note that the capacitance of the capacitor (100uf) should be the same as the capacitance of the original capacitor.

If you use a different capacitance capacitance, it may affect the performance of your circuit.

Dear, the following are related extensions, I hope it will be helpful to you<>

Regarding capacitance, it is a device that stores electrical charge and usually consists of an insulating medium between two conductors. When the capacitor is powered on, the bridge charge accumulates between the two pre-conductor bodies, causing the capacitor to become electrified. The electrical capacity of a capacitor depends on the distance between the two conductors and the dielectric constant of the medium.

The unit of a capacitor is farad (f), which indicates the amount of charge that can be stored when a capacitor is charged with a voltage of 1 volt. Capacitors have a wide range of applications in electronics, communications, energy storage, and other fields. <>