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Questions tagged [ceramic]

Ceramic is a kind of capacitor. They have less capacitance than electrolytic capacitors.

2
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1answer
56 views

Ceramic Capacitors vs DC Bias - Derating rule of thumb misleading?

Premise Ceramic capacitors with Class 2 dielectrics (such as X5R and X7R) usually show a reduction of its capacitance value as the applied bias voltage increases. This behavior is more prominent in ...
2
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1answer
125 views

Ceramic capacitor value for an LM386N project

I am adding an LM386 to a music project and follow the guidelines in the datasheet: My Vs is 4.7 V. My Vin comes straight from a 12 bit DAC of a Cortex M3 MCU and goes from 0 to 3.3 V. Pin 7 is ...
8
votes
3answers
846 views

If temperature is not an issue, what can be said about the different ceramic dielectrics

Let’s assume we have a circuit whose operating ambient temperature range is well-regulated to 25+-5C. Besides cost, what would be the use cases for the different ceramic dielectric types? In other ...
0
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1answer
43 views

Snubber capacitor VAC handling by frequency of C0G?

I'm looking for a suitable snubber capacitor (220 pf) for a boost converter. The semiconductor manufacturer recommends some ceramic capacitors for this http://www.mouser.com/ds/2/212/...
0
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1answer
76 views

Decoding Ceramic Capacitor

How could I decode this capacitor? MEXICO is written on the other side and it's in a speaker.
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2answers
88 views

Replacing radial fuse with ceramic/glass fuse

Is it possible to replace a radial fuse T5A 250V with a Glass or Ceramic Fuse 5A 250V? It's for a power supply for a LED TV.
6
votes
3answers
537 views

Help Identifying/Decoding Ceramic Capacitor

I am having a difficult time identifying a high voltage, ceramic capacitor that I need to replace. I've tried at length to research this myself to no avail. I am hoping that someone out there can help ...
0
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4answers
93 views

Capacitance decay of SMD ceramic capacitors

I want to use a 330nF X7R ceramic capacitor for an analog circuit. Obviously the capacitance value is very important for the correct working of the circuit. I haven't found on the datasheet if these ...
1
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1answer
147 views

Does voltage rating increase on ceramic capacitors have any effect on the performance of the capacitor? [duplicate]

If I have a circuit that is designed for a ceramic, SMD, 0402, 1uF, 10%, 10V rated capacitor, and I swap in a ceramic, SMD, 0402, 1uF, 10%, 25V capacitor would anything change in the circuit? Would ...
0
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0answers
70 views

Ceramic capacitors in series to increase AC voltage rating

If I put 4 of 1uFx100V cercaps in series I will virtually have one .25uFx400V capacitor. As I know I should use balancing resistors for even distributinon of the voltage across the capacitors. ...
11
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2answers
1k views

MLCC - Can I use high voltage rated caps for very low voltage scenarios?

Is there any important reason why I can`t use high voltage mulilayer ceramic capacitors for low voltage scenarios? For example 50V or 100V rated MLCCs for 3.3V DC applications? I have bad eyes, and ...
0
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2answers
74 views

What kind of components are these (2)?

What kind of components are these? It shows: GA 62A And a symbol Does anybody know what specs these can have? (note: updated the question since they were not capacitors).
0
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1answer
78 views

What ceramic capacitor is this?

I'm almost sure this is a ceramic capacitor, but I have trouble finding its characteristics. The first picture is the top side, the second the bottom side. The first shows: 120G (or 12OG) and an F. ...
2
votes
2answers
42 views

ceramic capacitance value

I am trying to figure out how to read the nominal value of this capacitor. When I use a meter it reads 3.4nF. I have several caps that have the format of .00X where X is an integer. Not sure how ...
1
vote
1answer
369 views

Selecting DC Blocking Capacitors for GPS, LoRa

I am designing a transmitter and receiver part of LoRa and GPS. It requires DC Blocking capacitors. I was looking for capacitor over digikey and I am amazed most of the manufacturer haven't specified <...
1
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3answers
94 views

Heat Conduction from ceramic resistor to iron rod

I'm trying to conduct a thermal conductivity test. I've set up an experiment where I take a rod of a given material (steel, for example), measure its cross section, length, extreme temperatures and ...
3
votes
4answers
589 views

Can a surface-mount ceramic capacitor fail partially and intermittently?

My focus is on surface-mount ceramic capacitors. The obvious failure extremes are open and short. Other than these extremes, can the failure be that the effective value of the capacitor is either ...
2
votes
1answer
312 views

How can I repair a ceramic capacitor? [closed]

This is an all-in-one Dell Inspiron One 2305. I received it for free because it was "having issues with the RAM." However, the power light was a solid amber when plugged in, and I was unable to ...
0
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3answers
389 views

Meaning of Ceramic Capacitor markings

I was inspecting a PCB with a magnifying glass and noticed some of the light brown ceramic smd capacitors have 3 digit markings on them. Is there a "standard" of what these markings stand for? The ...
0
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1answer
260 views

Can I use ceramic capacitor instead of polyester film box type capacitor in SMPS

I am working on 5V 1A power supply. I've made circuit on GPB which is working fine. I just wanted to know whether can I use ceramic capacitor instead of film box capacitor. Here is my schematic C8 ...
2
votes
1answer
1k views

SMD Ceramic capacitor MLCC 0805 vs 0603

I'm trying to choose the right size of smd mlcc ceramic capacitor. Two of the biggest values of my capacitors are, 4.7uF and 10uF which I first chose to be 0603 because my pcb space is very limited. ...
2
votes
3answers
182 views

Capacitors for 7805CV?

I have some questions about using capacitors with an L7805CV According to the datasheet, on page 4, it shows I need: C1 = 0.33 uF C0 = 0.1 uF I bought a few sets some time ago with 'common' values ...
0
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3answers
228 views

Why does the capacitance of ceramic capacitors change with test measurement voltage change?

I faced a problem of measuring capacity in ceramic capacitors. Measurements did with Smart Tweezers ST5S. It has two output voltage levels that can be selected: 0.45 Vrms and 0.9 Vrms. The capacitor ...
0
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3answers
68 views

Unpolarized Capacitors in place of Polarized ones

I have found some projects of interest, and on them there are generally a polarized capacitor in the range of 10 multiple (0.1uf, 1f, 10uf, 100uf, etc), and I do not know why I ordered a lot of ...
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1answer
96 views

Can a ceramic power resistor catch fire? [closed]

If I go over the max wattage of a ceramic power resistor by a few watts, can it catch fire/produce a flame?
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3answers
275 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-...
0
votes
2answers
758 views

AMS1117 33 sot223: is it ok with ceramic capacitors?

This is the datasheet of voltage regulator that I would use: http://www.advanced-monolithic.com/pdf/ds1117.pdf Is it possible to exchange that 22uF with an equivalent (or larger) ceramic instead of ...
1
vote
1answer
335 views

Choosing capacitor for RF coupling

I want to couple 10W at 150MHz, 50 Ohms (before and after an RF switch). The PA is a RA08H1317M powered by 14V DC. How do I choose an RF coupling capacitor? I have found this answer, but it only ...
1
vote
1answer
179 views

LM2664 can I use the ceramic capacitors instead of the electrolytic ones?

I need the negative voltage for my OPAMP and I use the LM2664 inverter. I have a very limited space available on my PCB. Is it OK to replace the electrolytic capacitors with the ceramic ones?
0
votes
1answer
202 views

Should SMB capacitors read their values after soldering onto a board?

I am doing an SMB soldering project. I Have here 3 ceramic capacitors, 100nF, I test each one after soldering to the board. Oddly, the capacitor at the top of this image is not reading any ...
3
votes
1answer
1k views

MLCC Capacitor color

Why MLCC capacitors have a different colors ranging from Brown to White? I wonder if it is related to ceramic / dielectric type or maybe some manufacturing reasons? Maybe manufactures add pigment in ...
5
votes
2answers
6k views

Capacitance vs. Frequency Graph of ceramic capacitors

I'm looking at ceramic capacitors on TDK and I see this graph Does this mean above several hundred kiloHertz - or wherever the graph stops - that the capacitor no longer functions probably ?
0
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2answers
258 views

Capacitor DC Bias Characteristic question

If ceramic capacitors lose their capacitance values quickly with increasing voltage (for example most capacitors I looked at from Murata and TDK have a curve like this) how do IC manufacturers ...
1
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1answer
363 views

Ceramic Capacitor Pulse Current

I am working on a powerboard that may need to switch up to 2kA and while working on some simulations the question occurred to me. How much current can flow in/out of a ceramic smd capacitor when ...
0
votes
2answers
171 views

Using a 0.1uF 275V ceramic capacitor for 5V LDO?

i was wondering if it's possible to use a high voltage ceramic capacitor for a 5V ldo, I also will use a 0.33uF 250V ceramic capacitor for the input. thaanks
2
votes
1answer
140 views

Ceramic Capacitance aging

I am using a 47uF 10V SMD capacitor (GRM31CR61A476KE15L) mainly for DC blocking. But it make a phase shift on the signal, we can deal with this phase as long as it remain constant(hence the ...
2
votes
1answer
2k views

Selecting a ceramic capacitor: Rule of thumb for required DC voltage rating

What is the rule of thumb for the DC voltage rating when selecting a ceramic capacitor (MLCC). Example: selecting a X7R decoupling capacitor, system voltage is 5V. Can I safely chose a capacitor with ...
6
votes
1answer
6k views

How to derate a ceramic capacitor for DC bias

I understand that the capacitance of a ceramic cap is very dependent on the DC bias applied to the terminals. At rated voltage, I've measured a decrease of up to 70%, and I've heard it can go higher. ...
3
votes
2answers
422 views

Radically different behavior between ceramic and electrolytic capacitors in electret microphone circuit

I've been trying to set up a microphone circuit for use in an AVR, essentially just to detect levels of noise. I observed some strange behavior in the amplified circuit I set up, so i elected to strip ...
1
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0answers
600 views

Replacing ceramic capacitors with film in PSU

Some Behringer Truth B2031 came back from a friend and they're acting up. first thing I noticed was the four .1uf ceramics that are in parrellel with the bridge rectifier diodes have experienced ...
1
vote
3answers
879 views

Why don't ceramic capacitors have codes for voltage rating?

Say a ceramic capacitor with the code 103 (0.01 micro farad). How to identify its voltage rating? Searching for a 0.01 micro farad capacitor in Mouser the voltage rating is indicated as 1kV dc. I ...
1
vote
1answer
482 views

replacing ceramic capacitors in a wifi router [closed]

We had a thunderstorm a few days ago and our Asus DSL-N14U modem router stopped working. I opened it up and as far as I can see everything on the PCB is in good shape except two ceramic capacitors ...
3
votes
1answer
988 views

Ceramic capacitors microphonic bandwidth

I need to use some relatively high value (10uF) capacitors in a discrete switched capacitor circuit and I need them to precisely store their voltage for a small amount of time (about 5us). The ...
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votes
3answers
140 views

Undetectable capacitor [closed]

Hi I have this component which I suppose is a ceramic capacitor, it is soldered into a Bose 901 Equalizer series IV and between 2 output leads of the main transformer in parallel to a bulb signalling ...
3
votes
1answer
2k 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 ...
1
vote
2answers
476 views

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 ...
1
vote
1answer
3k views

What's the difference between these two capacitors “JNC-JN222M” and “222-1KV”?

I have these two ceramic capacitors shown in the image below: It seems to me that both of them have 2.2nF capacitance and the first one has 400V rated voltage while the other one has 1000V rated ...
1
vote
1answer
558 views

High value ceramic capacitors?

In a project, I am using the PTN78020H power supply, and it has a recommended circuit (from the datasheet linked above) that looks like this: Now on the input, it requests a massive 4 x 4.7uF ceramic ...
3
votes
1answer
179 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 ...
0
votes
1answer
265 views

Unusually high ESR of cheap ceramic capacitors

I recently bought the De5000 LCR meter and have been measuring some components I have on hand to get a feel for the meter. Measuring electrolytic and Mylar capacitors have given reasonable ESR values ...