Precision resistor prices

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Dear All
I want to know your opinion about these prices on digikey, Are they real? If so why I have got so much lower prices from Chinese distributors? They told me they would sell them at around .1USD each!

http://www.digikey.com/product-d...

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Because those Chinese ones don't offer the same performance as these Vishay ones. Show me the datasheet of the Chinese one.

These are really speciality resistors. Things you'll find in high-end equipment, not your $20 Chinese multimeter.

Reading the datasheet the price seems reasonable to me.

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They will sell the same resistor for .1USD each.
But buying 5000 of them @37,680 is insane!!! They just do not make any sense! Suppose they all made of gold, you should buy them at least 5 times lower, or Vishay and others make Resistors worth more than gold!!!
Maybe Digikey just made a mistake in the prices!

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The price is correct.

#1 This forum helps those that help themselves

#2 All grounds are not created equal

#3 How have you proved that your chip is running at xxMHz?

#4 "If you think you need floating point to solve the problem then you don't understand the problem. If you really do need floating point then you have a problem you do not understand." - Heater's ex-boss

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I simply refuse to believe that that Chinese version is of the same quality as the Vishay one.

Chinese will always say yes, so... point me to an actual datasheet. Which probably is bogus anyway. Like fake CE markings.

The price is of course more then just the raw material price. Vishay will make these resistors in any value you like, without extra charge. Which indicate they are likely made to order.

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Quote:
The price is of course more then just the raw material price.

Of course the price should be higher than raw material, but the question is how much?

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1Kg of gold worth about 55,825.27 USD, and a complete reel of resistors including its package weight something like 250gr,
http://www.24hgold.com/english/g...
So the question is what they are doing!?

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Do you really need that kind of precision?
Does your 10000 ohms resistor really have to be 10000 +/- 1 ohm!?
If yes, then I guess that's just the way things are! I can see the price from one of my suppliers here for 0.01% resistors are roughly twice the price at digikey...

However 0.05% resistors are roughly 1/10th of the price of 0.01% resistors!

- Brian

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I've been using a Vishay radial resistor for 25 years with that same spec, and these days they cost me about $8 each. They are indeed a custom wound part.

Tom Pappano
Tulsa, Oklahoma

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To get the accuracy we're talking about here, each resistor is typically laser trimmed to the desired resistance to compensate for any process variation that may exist in the substrate. The price is real and fair, if your device needs that level of precision you need to reflect that in the price of your device.

How about some info on your application. What voltage range are you measuring, and how many bits of resolution is your ADC? What temperature range will the resistor be operating in?

Writing code is like having sex.... make one little mistake, and you're supporting it for life.

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Out of curiosity I made a trip to digikey.com and searched for 0.001% resistors. The Vishay in question are "foil". There are also 0.01% offerings in the same size that are "thin film" which, while not 0.1USD each are about $1 each in quantity. You sparkies will need to tell me if that matters. It appears that the "foil" have better temperature coefficient?

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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Ali - precision parts are always pricey. Show me the datasheet and compare it to the other datasheet. Vishay will does some really serious stuff to keep everything as specified (temperature stuff, life rating, power rating), properly source their materials and such. If the chinese are doing the same, great! Do you truly believe they are? Try buying and see.

As for comparing the price of gold per kg to the price of resistors per kg... Well, into every one of those resistors came time, testing, a truckload of technology and such. A complex processor or similar per kg costs more than gold as well. So that comparison is not very useful.

The fact is that we've been buying precision 100 Ohm resistors from Vishay for a lot of money for a lot of years, and we have yet to have ONE problem which would concern the resistor or any aspect of it.

There are pointy haired bald people.
Time flies when you have a bad prescaler selected.

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theusch wrote:
Out of curiosity I made a trip to digikey.com and searched for 0.001% resistors. The Vishay in question are "foil". There are also 0.01% offerings in the same size that are "thin film" which, while not 0.1USD each are about $1 each in quantity. You sparkies will need to tell me if that matters. It appears that the "foil" have better temperature coefficient?

Not sure, maybe the non-inductive property of this particular type? Or overload survival capability. Maybe tempco or aging characteristics.

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Quote:
Out of curiosity I made a trip to digikey.com and searched for 0.001% resistors. The Vishay in question are "foil". There are also 0.01% offerings in the same size that are "thin film" which, while not 0.1USD each are about $1 each in quantity. You sparkies will need to tell me if that matters. It appears that the "foil" have better temperature coefficient?

would you tell me some part numbers?

The main question in here is not about my precision work, it’s about why the prices are so hooot! in vishay site I have seen some parts having 0.001% precision so we should expect 10 times or at least 2 times 0.01% price increase!!!?

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Don't we customers make manufactures make these prices?

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You "make the price" when there is someone else willing to make something suitable for your application at a lower price.

It rarely works to tell a part source: "Your prices are too high and I will only pay this amount for it!" Almost every time, the response you will get is "OK, find what you need some where else."

That is the way business works. Unless you are WalMart, (American retail store) maybe.

Jim

Jim Wagner Oregon Research Electronics, Consulting Div. Tangent, OR, USA http://www.orelectronics.net

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Quote:
Don't we customers make manufactures make these prices?
Ali, if you can make 0.001% resistors for better prices than Vishay, you should start a business and do just that. Vishay is not the only supplier of precision devices out there. But you might find out, that there's a reason for those prices.

While it is true that customers affect the value of a commodity, it is also true, that, in any area where there is not a single monopoly, suppliers are trying their best to bring the prices down, so they will attract more customers.

There are pointy haired bald people.
Time flies when you have a bad prescaler selected.

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And the market for high and long term stable, very tight tolerance, nearly temperature insensitive, robust and reliable resistors is fairly small. These are not churned out by the million per day. Not to mention there are not that many application that require this sort of performance. Extremely high end multimeters and calibrators or speciality laboratory equipment come to mind.

They are almost like the Bugatti Veyron among resistors.

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The small market also means not many suppliers.

Jim

Jim Wagner Oregon Research Electronics, Consulting Div. Tangent, OR, USA http://www.orelectronics.net

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I think 'economies of scale' sums it up.

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Quote:

would you tell me some part numbers?

Can't you do the same thing I did? Got to DigiKey site. Search for "resistor". Pick "Chip Resistor, Surface Mount". (Or, use the link you gave earlier for the Vishay part and click on that category.) 270000 selections to choose from!

[Oh, perhaps I see why you are confused...at one point I wrote 0.001% when I meant 0.01% ...]

Use the parametric search to select a value--I used 10k ohms. Pick the 0.01% tolerance. Apply filters.

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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Quote:
Chip Resistor, Surface Mount". (Or, use the link you gave earlier for the Vishay part and click on that category.) 270000 selections to choose from!

You said it was 0.001% and I have seen some numbers on vishay site, but could not find them on digikey.
http://www.vishaypg.com/foil-res...
http://www.vishaypg.com/foil-res...

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It's easy to typo an extra zero ;)

I wonder how expensive the VHP203 is.

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Quote:
I wonder how expensive the VHP203 is.

Maybe they cost more than an iCore7 CPU!

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Nope, just about 15 EUR/piece.

There are pointy haired bald people.
Time flies when you have a bad prescaler selected.

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Regular distribution or direct buy from Vishay at production quantities?

Farnell carry the 0.005% ones, and cost around €57.51/piece :shock:

Of course, Farnell is not known for its super-dooper low prices ;)

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I suddenly remember that at work I once looked up the price of a failed high power resistor inside a passive load and found it was about €200.

This similar one is €548 :mrgreen:

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Curiously, the same part according to octopart is available for a lot less from another link to farnell:

http://sk.farnell.com/jsp/displa...

There are pointy haired bald people.
Time flies when you have a bad prescaler selected.

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theusch wrote:
Out of curiosity I made a trip to digikey.com and searched for 0.001% resistors. The Vishay in question are "foil". There are also 0.01% offerings in the same size that are "thin film" which, while not 0.1USD each are about $1 each in quantity. You sparkies will need to tell me if that matters. It appears that the "foil" have better temperature coefficient?

Their excitation properties under various AC frequencies is a key difference. Metal foil are inherently less inductive. Thermal noise and power dissipation as well are key differences.