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Questions tagged [tantalum]

Tantalum (Ta) is a chemical element used as an anode in tantalum electrolytic capacitors.

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ESR of tantalum capacitors

I am surprised to see that the ESR of tantalum capacitor for the same package decreases with the capacitances. Here is a series of tantalum capacitor. If the ESR decreases with the capacitances for ...
Jess's user avatar
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4 votes
2 answers
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100mF Tantalum Capacitor?

I was looking at a circuit online when happen that both in schematic and on the board I saw this tantalum capacitor with a value of 100mF. Now 100mF are 100000uF, It looks small for having such a ...
Ken90's user avatar
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what is single face electrode on F72 series capacitor?

I'm looking at kyocera-avx F72 series capacitor. I'm puzzled at the last 3 numbers of the part number AQ2 or Q2 which say single face electrode. I thought capacitor come with 2 electrode be it ...
sunny's user avatar
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Can you replace ceramic or tantalum capacitors with aluminum electrolytic capacitors?

I have a question about the hookup for my 12VDC to 5VDC step down module - the K7805JT-500R3. It states in the datasheet that ceramic capacitors are what can be used but it also states that tantalum ...
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Should I be skeptical of a component when its datasheet specifies a specific type of capacitor?

I'm researching 5V regulators for a project and came across one that looks promising, but I noticed that its datasheet specifically calls for a tantalum capacitor on its output. Normally I wouldn't ...
E.HP.S's user avatar
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How can I select a tantalum capacitor for a 2 MHz DC/DC boost power supply?

I am using the MAX8815AETB+T in a fixed 5 V configuration in a design. The datasheet recommends using a Cout = 22 μF tantalum (output capacitor). The problem I am having is that the boost converter ...
WalterPH's user avatar
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3 votes
1 answer
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Need help identifying the value of a tantalum capacitor marked 226C

Recently, there was an accident. A capacitor blew and left a fixable problem. In the following picture, there is a surface mount capacitor whose capacitance value is unknown. Please help me. Worst ...
Jacob P's user avatar
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3 answers
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Can I use a tantalum capacitor instead of an aluminium capacitor with an AP1509-50SG? [closed]

I am planning to use an AP1509-50SG converter in one of my projects. There is only a very small area to place components. Aluminum capacitors rated 300uF/16VDC or 330uF/25VDC have a large footprint ...
Htekin's user avatar
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What does 330 followed by 64GPH d on a tantalum capacitor mean?

What do these numbers mean? I need to buy one, but with the following codes on it I cannot find anything.
Tadas's user avatar
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Tantalum capacitor at low temperatures

What could happen to a solid tantalum capacitor that operates below the lower temperature range defined by the manufacturer (-55°C)? From my understanding, there would be a performance issue with ...
Dews's user avatar
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Can I replace the ceramic capacitor with tantalum?

In the following topology, a 2200nF multilayer ceramic capacitor (SR305E225MAR) is used in the compensation network. Can I replace it with a tantalum capacitor with equivalent voltage and capacitance? ...
WeTech's user avatar
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Buck converter: capacitor voltage ratings

I'm currently designing a PCB for a caving robot, where PCB space is rather limited. One thing taking quite some space are the input and output capacitors of the 12 to 5VV DC-DC converter. I basically ...
Sandro's user avatar
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1 answer
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I have a height problem (with my switching regulator on a height constrained PCB)

I was planning to use this part (datasheet) (basically MC34063 with thermal shutdown,) but I don´t have enough room above the PCB. I need to keep the components under 2.2mm. According to my ...
mistermister's user avatar
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1 answer
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Tantalum capacitor reverse polarity

I have a datasheet for a part (TPS6735IDR) that shows application circuit examples where polarised capacitors are connected the wrong way around (positive terminal to ground). I thought this would ...
jerrybenny18's user avatar
1 vote
1 answer
130 views

Replacing 10uF tantalum capacitors with X7R in ADM2587E circuit

I'm working on some device with isolated RS485 based on ADM2587E transceiver with integrated high frequency isolated DC/DC converter. This IC is a bit tricky if you need low EMI, because DC/DC ...
Kamil's user avatar
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22 votes
6 answers
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Why recommend tantalum over ceramic capacitor for voltage regulator? [duplicate]

The LM1117 voltage regulator datasheet recommends using tantalum capacitors on the input and output. What is the reason for this? What advantage does tantalum have over a ceramic capacitor? A 10μF ...
user31708's user avatar
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Identify polarity of 1970's-era dipped tantalum capacitor

Having found the shorted component, now I need to replace it. I'm familiar with dipped tantalum capacitors with painted stripes along one side but these have a dot or stripe up the middle and my Web ...
Simon Owen's user avatar
7 votes
4 answers
4k views

Why use a tantalum instead of a ceramic capacitor?

On page 72 of the AD7124-4 datasheet it says: Decouple AVDD with a 1 μF tantalum capacitor in parallel with a 0.1 μF capacitor to AVSS on each pin. Why would this capacitor be specified to be a ...
Miomio's user avatar
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2 votes
1 answer
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Is it ok to replace a tantalium decoupling capacitor with ceramic?

I am using the Analog Devices ADXL343 accelerometer (https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL343.pdf) which advises using a 1uF tantalium cap on one power line, and a 0....
bgarrood's user avatar
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Help identifying tantalum capacitor without EIA capacitance markings

I purchased some Samsung PM953 NVMe SSDs from an eBay seller. Unfortunately one of the SSDs has failed power loss protection capacitors and while functional, operates in a fail-safe mode at severely ...
hwmartin's user avatar
2 votes
2 answers
2k views

Help identifying tantalum capacitor marked E105

I am trying to repair a device that was handed to me. It has a broken tantalum capacitor with a missing lead, so it needs replacement. However I'm having trouble identifying its capacitance, voltage ...
CapacitaurusRex's user avatar
3 votes
4 answers
7k views

Can you replace electrolytic capacitors with tantalum ones?

Due to size constraints on a custom PCB, I have opted out for using the smallest type of electrolytic capacitors (3 mm diameter.) However, capacitors in such a small diameter are almost impossible to ...
Tommy D's user avatar
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1 answer
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Maximum allowable ripple current and surge current for tantalum capacitor

I use two 10uF, 20VDC tantalum capacitors in parallel as decoupling capacitors just after the battery connector. At the moment the battery is plugged in, one of the capacitors sometimes burns out (not ...
Wanghz's user avatar
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2 answers
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Why is a tantalum capacitor recommended?

I am looking at the datasheet of an accelerometer (ADXL345), and in the power supply decoupling section, it says to use a tantalum capacitor. Why is this recommended?
Reid's user avatar
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2 answers
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How fast do tantalum capacitors self-heal? [closed]

I am troubleshooting a design that uses a 47 µF 20 V tantalum SMD cap across a 15 Vdc rail. While the derating guidelines I follow dictate a 50% voltage derating for tantalum caps, the design I'm ...
Bort's user avatar
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3 answers
3k views

Identifying an SMD Tantalum Capacitor

I'm having trouble identifying a blown SMD tantalum capacitor. The markings on it are 10 35L which I took to be the capacitance, voltage rating, and tolerance, but looking up that component on the ...
penguin359's user avatar
1 vote
3 answers
889 views

LDO with tantalums and circuit with ceramic bypass capacitors

I'm going to use MIC5205 voltage regulator. According to the datasheet and many sites and discussions I must use tantalum capacitors for the output. This LDO is unstable with ceramic capacitors (low-...
Chupacabras's user avatar
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3 votes
2 answers
1k views

Tantalum capacitor as bypass for digital IC

I am reading the MCP4725 digital-analog converter datasheet and they recomend to use two bypass capacitor at supply voltage: The power supply at the VDD pin should be clean as possible for a good ...
D. Arius's user avatar
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1 answer
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Why do tantalum capacitor datasheets only quote endurance at their max temperature? How does it change at room temperature?

I'm on my first large board design, and it's only begun to dawn on me how infuriating capacitors can be to design with. Exhibit A: I need 100uF for a simple circuit to keep my FPGA on for 1ms after ...
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Low or High ESR for LDO for a wireless board?

I'm designing a board powered by a LiPo battery and the AP2114H LDO. At the battery side, I chose to use a 100nF ceramic and a 220uF tantalum. But I do not understand what are the considerations for ...
Evgeny Zislis's user avatar
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0 answers
302 views

Tantalum capacitor selection in LT3652 Buck Converter

In this circuit, a buck solar single cell Li-Ion battery charger, I need to select C3 and C4 tantalum capacitors. \$V_{BAT(FLT)}\$ is going to be 4.2 V, hence I selected: \$C3_{VMAX}=10\text{ V}\$ \$...
Nic1337's user avatar
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6 votes
1 answer
5k views

What are the key differences between Tantalum and Tantalum Polymer capacitors?

I've noticed that most component retailers split these types, and am wondering what comparative differences there are between them. I know that "regular" tantalum caps usually use MnO2 as an ...
Polynomial's user avatar
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1 vote
1 answer
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What does "Transient Response Recovery" means in the output specification of a AC-DC power supply?

I'm using a AC-DC power supply to provide 24VDC input to a PCB. A 100uF,35V tantalum is used as one of the filter capacitors for the 24V(same from supply) input of DC-DC regulator on PCB. In some ...
Saranraj Annamalai's user avatar
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1 answer
1k views

Calculating the leaking current for a tantalum capacitor

I've been looking at these tantalum caps for a coin cell operated BLE device, but I'm a little confused by specified leakage current. The datasheet lists the leakage current at <= 0.003CV uA. ...
CHendrix's user avatar
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1 vote
3 answers
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Tantalum capacitor burning out

I am using a tantalum capacitor of 10 uF rated at 20V as a decoupling capacitor. It is placed in parallel with a 5V supply. Now when the circuit is powered, the capacitor burns out. I replaced the ...
Fern24's user avatar
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0 votes
2 answers
1k views

Producing Voltage Spikes from a bench top power supply

I need to test a tantalum capacitor(check if it gets shorted for a spike higher than the rated voltage) and I'm planning for providing voltage spikes to the input connector from a bench top power ...
Saranraj Annamalai's user avatar
4 votes
2 answers
5k views

MLCC vs Tantalum: For Decoupling, input to regulator and ripple reduction

I require a 3.3uf capacitor in a 30 VDC environment for three different purposes: decoupling of precision ADC or DAC; input to a regulator (linear, switching, LDO); and output of any regulator for ...
hadez's user avatar
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1 vote
2 answers
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Schematic reading capacitor values

I've got a schematic that i found on the internet. The schematics is for a solar pwm charger designed around a microcontroller in this case a arduino. The problem lies in the values for the ...
FriendlyAgent's user avatar
3 votes
1 answer
377 views

Should I use MLCC or Tantalum capacitors near the board's power input?

My board consists of a microcontroller, some RF modules (i.e. bluetooth, wifi, etc), and a few other gadgets. It is powered by a 12V barrel adapter. I've read conflicting reports whether it's best ...
Adam B's user avatar
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17 votes
4 answers
13k views

Ceramic (MLCC) versus Tantalum capacitors

From the perspective of an electronics designer, but also taking into account price/cost and social considerations (see Coltan mining and ethics link below), I tend to avoid Tantalum capacitors under ...
jose.angel.jimenez's user avatar
4 votes
1 answer
3k views

Burned Out Tantalum Capacitor Replacements

I have an old computer with a broken Miniscribe 8425SA hard disk. One of the capacitors has burned out, and need some help finding a replacement. Here are my questions: It appears there are similar ...
Kaypro II's user avatar
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0 votes
1 answer
621 views

Aluminum electrolytic vs. tantalum capacitor for buffering SAR ADC Ref input

I want to use the ADS8317 16-Bit SAR A/D converter and have read through the datasheet. In there, ti recommend using a low ESR 47µF tantalum capacitor to buffer the reference input. Now, my reference ...
Medo42's user avatar
  • 607
4 votes
2 answers
440 views

MAX682 with electrolytic capacitors

In a new design I would like to use the MAX682. In the datasheet I found this typical operating circuit: I would like to use it exactly like that except that I'm going to pull /SKIP to GND. In table ...
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1 vote
0 answers
267 views

Are polymer tantalum capacitors safe for use in new designs?

I want to expand this post to cover polymer tantalum caps. In my application I have an older switching regulator that outputs 24V and needs large output capacitance (220uf), so ceramic or polymer ...
AMG's user avatar
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113 votes
6 answers
44k views

Are tantalum capacitors safe for use in new designs?

I've heard it suggested that "solid tantalum" capacitors are dangerous and may cause fire, may fail short circuit and are fatally sensitive to even very short over voltage spikes. Are tantalum ...
Russell McMahon's user avatar
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6 votes
1 answer
1k views

Are tantalums good for PIC Vcap?

I understand that ceramics are good at ESR but would like to know if tantalum would suffice for my application. Some 16 bit PICs require a >4.7uf cap (10uf recommended) low ESR cap for their internal ...
Chetan Bhargava's user avatar
9 votes
4 answers
5k views

What is this: a dual CAP?

I am trying to figure this cap out and locate a new one. It says 107K and 10K on it. Is is polarized ? what is it and where do i find one ?
Neil's user avatar
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8 votes
2 answers
6k views

Which type of 100nF capacitor is best for 78xx regulator output?

I use 78L12 or similar voltage regulators in a few power supplies. I use them in their basic setup, see the picture: This diagram is common for all 78xx and 78Lxx regulators. It says that output ...
Al Kepp's user avatar
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26 votes
3 answers
21k views

Why does the LM1117 data sheet specifically specify tantalum capacitors?

I'm planning on using an LM1117 to regulate 5 V to 3.3 V. Looking at (any of the several) data sheets for the LM1117, they recommend 10 µF tantalum capacitors between input and ground ...
Jon Bright's user avatar
3 votes
1 answer
4k views

Replacing Tantalum capacitor?

I'm going to make a PIC programmer, so currently I'm acquiring parts that I'll need. And here's the one part that I can't get: ...
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