The Difference Between Ordinary and High-Frequency Electrolytic Capacitors

The Importance of Electrolytic Capacitors

 

The basic structure of an electrolytic capacitor is an aluminum shell on the outside, which is filled with electrolyte and leads to two positive and negative electrodes. This constitutes the basic structure of the electrolytic capacitor. Its main function is filtering, that is, reducing ripple and stabilizing the capacitor. Current is widely used in products such as switching power supplies. Its working process can be understood as the process of charging and discharging. Therefore, for an ideal electrolytic capacitor, it does not consume energy. Not consuming energy means that it will not generate heat, but Actual capacitors will generate heat due to the presence of internal resistance.

 

Classification of Electrolytic Capacitors

 

At present, there are two main types of electrolytic capacitors, one is aluminum electrolytic capacitors, and the other is tantalum electrolytic capacitors. The main difference between the two is that the anode material is different. Both are electrolytic capacitors that are commonly used in circuits. As electrolytic capacitors , its capacity is generally above 1μF, but capacitors with a capacity of 1μF are not necessarily electrolytic capacitors. There are also other capacitors, such as monolithic capacitors, polyester capacitors, etc.

 

Ordinary Electrolytic Capacitors

 

When it comes to ordinary electrolytic capacitors, the most commonly used ones are aluminum electrolytic capacitors. This capacitor has a large capacity and is prone to leakage. It is suitable for filtering. However, this capacitor has a large internal resistance. The following figure is the capacitor equivalent circuit diagram. Among them: Rc is the leakage resistance, Ln is the parasitic inductance, and Rn is the loss resistance caused by other reasons.

Capacitor Equivalent Circuit Diagram

Aluminum electrolytic capacitors have the opportunity to resonate when the frequency is higher than a certain condition. Before that, they are capacitive. When they exceed this frequency, they become inductive. Therefore, in our actual circuit, if the frequency is not high, the operating frequency is generally lower than the resonant frequency of the capacitor itself. 1/10. at this time we can ignore the impact of the parasitic effect of the capacitor on the circuit.

 

High Frequency Electrolytic Capacitors

 

Compared with ordinary electrolytic capacitors, high-frequency electrolytic capacitors are suitable for high-frequency applications. The capacity of high-frequency capacitors generally cannot be as large as that of ordinary electrolytic capacitors. High-frequency capacitors are suitable for applications with higher frequencies. Circuits, such as the filtering of switching power supplies and the output filter electrolytic capacitors in switching power supplies, have output voltage frequencies as high as tens of kHz or even tens of MHz. For ordinary electrolytic capacitors, they have long been inductive at this frequency, but high-frequency capacitors But it can play a very good filtering role.

 

UF Capacitors as a leading player in passive component markets, has developed various series of SMD type electrolytic capacitors, with long life hours, low ESR on request.

 

And with years of supplying to global markets, we UF Capacitors has been able to replace many famous brands such as Panasonic electrolytic capacitors, EPCOS electrolytic capacitors.

 

Below are our cross reference sheet for buyers’ better review.

SMD Electrolytic Capacitor Cross Reference
Photo	Description	UF Capacitors Series Code	Rubycon	Samwha	Sanyo	Nippon Chemi-Con	Yageo	Nichicon	Panasonic	EPCOS	DAEWOO
	TCS 85C V-Chip Aluminum Electrolytic	TCS Series	SEV Series	SC Series	CE-BS Series	MVA Series	CA Series	UWX Series	EEE-X(A)S Series	B41112 Series	CS Series
	TCK 105C V-Chip Aluminum Electrolytic	TCK Series	SKV Series	RC Series	CE-FS Series	MVE Series	CB Series	UWT Series	EEEHA Series	B41123 Series	CU Series
	TFZ 105C 2000-5000 long life with extra lower impedance Aluminum Electrolytic	TFZ Series	TZV Series TPV Series	CM Series	***	MZA Series	***	UUD Series UUA Series NACZ Series UCD Series UWD Series	EEE-FK Series EEE-FT Series EEV-FK Series	***	***
	TLZ 105C 1000-2000h lower impedance Aluminum Electrolytic	TLZ Series	SZV Series	***	***	MVY Series	***	UCL Series UCM Series	EEE-FC Series EEE-FT Series	***	***
	TMA 105C 2000h conductive polymer aluminum solid  Aluminum Electrolytic	TMA Series	PAV Series PHV Series	FA Series	***	PXE Series	***	CV Series RFS Series	SVPE Series SVP Series	***	***
	TMB Series 105C 2000h conductive polymer aluminum solid Aluminum Electrolytic	TMB Series	PAV Series PHV Series	FA Series	***	PXE Series	***	CV Series RFS Series	SVPC Series SVP Series	***	***

 

If you want to buy electrolytic capacitors -55℃-+105℃,long life hours, Low impedance, you can choose our TLZ, TFZ Series.

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