The difference between polymer tantalum capacitors and standard tantalum capacitors

The full name of tantalum capacitor is tantalum electrolytic capacitor, which belongs to a type of electrolytic capacitor. It uses metal tantalum as the medium, unlike ordinary electrolytic capacitors, which use electrolyte. Therefore, it is suitable for working at high temperatures. It is a small size product in capacitors that can achieve large electrical capacity, and has advantages in power filtering, AC bypass, and other applications

 

Introduction to polymer tantalum capacitors

 

Polymer capacitors are chip stacked aluminum electrolytic capacitors that use high conductivity polymer materials as cathodes, with excellent electrical performance that surpasses existing liquid chip aluminum electrolytic capacitors and solid chip tantalum electrolytic capacitors. Polymer capacitors are within the rated voltage range and do not require voltage reduction.

It has an extremely low equivalent series resistance (ESR) and strong ability to reduce ripple voltage, allowing for larger ripple currents to pass through. The impedance curve of polymer chip stacked aluminum electrolytic capacitors exhibits approximately ideal capacitor characteristics at high frequencies. Under frequency changes, the capacitance is very stable. This type of capacitor is mainly used for bypass decoupling/energy storage filter capacitors on motherboards (laptops, flat panel displays, digital switches), switching power supplies, DC/DC converters, high-frequency noise suppression circuits, and portable electronic devices.

 

Diagram of Dimensions of tantalum capacitors

 

 

Marking on Capacitors Body

 

Advantage of tantalum capacitors

 

Tantalum capacitors themselves have almost no inductance, but this also limits their capacity. In addition, due to the lack of electrolyte inside tantalum capacitors, they are very suitable for working at high temperatures.

The characteristics of tantalum capacitors are long lifespan, high temperature resistance, high accuracy, and excellent high-frequency harmonic filtering performance. During the working process of tantalum electrolytic capacitors, they have the ability to automatically repair or isolate defects in the oxide film, enabling the oxide film medium to be reinforced and restored to its original insulation capacity at any time, without continuous cumulative damage. This unique self-healing performance ensures its advantages of long lifespan and reliability.

Tantalum electrolytic capacitors have a very high working electric field strength and are larger than similar capacitors, ensuring their miniaturization.

 

Disadvantages of tantalum capacitor:

 

The capacity is small, the price is also more expensive than aluminum capacitors, and the ability to withstand voltage and current is weak. It is used in places with high capacity filtering, such as near CPU slots where tantalum capacitors can be seen, often used in conjunction with ceramic capacitors, electrolytic capacitors, or in places with low voltage and current.

 

The difference between polymer tantalum capacitors and ordinary tantalum capacitors

1. Can be used at 80%~90% rated voltage

	Standard tantalum capacitor			Polymer tantalum capacitor
	Standard	Low ESR	Ultralow ESR
Recommended voltage (%)	50% Rated Voltage	50% Rated Voltage	50% Rated Voltage	80%~90% Rated Voltage

 

2. Lower failure rate

	Standard tantalum capacitor	Polymer tantalum capacitor
100 PPM failure rate  % VRated	68%	114%
Failure rate at 50% rated voltage (ppm)	9	0
Failure rate at 80% rated voltage (ppm)	458	5
Failure rate at 90% rated voltage (ppm)	1700	19
Failure rate at 100% rated voltage (ppm)	2943	95

 

3. No combustion failure mode
4. Ultra-low equivalent series resistance（ESR）

	Standard tantalum capacitor			Polymer tantalum capacitor
	Standard	Low ESR	Ultralow ESR
ESR (ohm)	1 ~ 2x	0.1 ~ x	0.0x ~ 0.x	0.00x ~ 0.0xx

 

5. Polymer cathode technology has high-frequency response effect（100uF ）

 

Operating  frequency voltage	Standard tantalum capacitor	Low ESR tantalum capacitors	Polymer tantalum capacitor
Hz	uF	uF	uF
100	100	100	100
1,000	100	100	100
10,000	92	99	100
50,000	38	78	101
100,000	21	49	98
500,000	7	13	64
1,000,000	5	9	37
5,000,000	3	4	11

 

6. Application and cost comparison (with lower cost)

 

Application of tantalum capacitors

 

Typical applications include DC/DC conv erters,

audio/sound circuits (mobilephone and base stations, smart phones, MP3players),

power supply inputs, portable electronics (notebook PCs, displays,SSDs, HDDs and USBs, digital cameras, GPS

navigation systems, WiFi modules), telecommunications, consumer electronics(analytical and test equipment, high speedservers),

high voltage applications such as 12 V to 48 V power input rails, densely populated circuits with space restrictions,

microprocessor decoupling, and high ripple current applications

 

Tantalum capacitors of UF Capacitors

 

UF Capacitors Factory is a reliable China tantalum capacitors manufacturer and China tantalum capacitors supplier. As a China Polymer Capacitor supplier and China Tantalum Capacitors factory, we have advanced production line which imported from Japan. Our factory quality control system is ISO 9001: 2015 and China military parts quality control system GJB9001C-2017. We are awarded with polymer tantalum capacitors patents in 2017. Currently, we exported tantalum capacitors series like CA42, CA45, CA45U series and Polymer Tantalum Capacitors CA55 series to USA, Canada, Brazil, Argentina, Mexico, South Africa, Tunisia, New Zealand, Australia, Germany, Italy, France, UK, Poland, Bulgaria, Spain, Portugal, Russia, Belarus, Ukraine, Korea, Vietnam, Singapore, Malaysia, Indonesia, India, Philippine,Thailand. And Topdiode and UF Capacitors supply our various capacitors to famous international companies like GE, Jabil, Honeywell and so on.

 UF Capacitors’ tantalum capacitors and polymer tantalum capacitors can replace AVX Tantalum Capacitors TAJ Series, Polymer Capacitors KYOCERA AVX, Kemet Tantalum Capacitors T491 Series and Polymer Capacitors Kemet, Vishay Tantalum Capacitors 293D Series, and Panasonic Conductive Polymer Tantalum Solid Capacitors.

 

Tantalum capacitors series of UF Capacitors:

 

1. CA42 Dipped Tantalum Capacitors
2. CA45 Chip Tantalum Capacitors 
3. CA45U Low ESR Chip Tantalum Capacitors
4. CA55 Polymer Tantalum Capacitors  

 

Here are some cross reference from UF Capacitors:

 

UF Capacitors Part Number	UF  Description	Competitor P/N
CA45 Chip tantalum capaciotrs (standard series)
CA45T105K0025000AR000	CA45 1uF 25V +/-10% Case A T&R RoHS	TAJA105K025RNJ
CA45T105K0035000AR000	CA45 1uF 35V +/-10% Case A T&R RoHS	TAJA105K035RNJ
CA45T106K0006000AR000	CA45 10uF 6.3V +/-10% Case A T&R RoHS	TAJA106K006RNJ
CA45T106K0010000AR000	CA45 10uF 10V +/-10% Case A T&R RoHS	TAJA106K010RNJ
CA55 polymer tantalum capacitors
CA55T107M0020000DR101	CA55 100UF 20V +/-20% Case D T&R RoHS	TCJD107M020R0055
CA55T157M0006000BR101	CA55 150uF 6.3V +/-20% CaseB T&R RoHS	6TPG150M
CA55T337M0006000DR450	CA55  330UF 6.3V +/-20% Case D T&R RoHS	T520D337M006ATE045
CA55T476M0025000HR101	CA55 47uF 25V +/-20% Case H T&R RoHS	16TQC47MW
CA55T477M0006000DR350	470UF 6.3V +/-20% Case D T&R RoHS	6TPB470M
CA45U Low ESR series
CA45UT475K0050000DR701	CA45U 4.7UF 50V +/-10% Case D T&R RoHS ESR: 700mOhm	T494D475K035AT
CA45U107K0025000ER151	CA45U 100uF 25V +/-10% Case E T&R RoHS ESR: 150mOhm	T495X107K025ATE150
CA45UT477K0006000DR101	CA45U 470UF 6.3V +/-10% Case D T&R RoHS ESR: 100mOhm	T495D477K006ATE100
T495D107K016ATE100	CA45U 100UF 16V +/-10% Case D T&R RoHS ESR: 100mOhm	T495D107K016ATE100

 

 

How to Obtain a Quote from UF Capacitors?

 

You can easily send an email to lily@ufcapacitors.com, the engineering and sales team in UF Capacitors will help you select the correct polymer aluminum capacitors.

For more details, pls visit our website: www.ufcapacitors.com