1N4729A DATASHEET PDF

1NA datasheet, 1NA pdf, 1NA data sheet, datasheet, data sheet, pdf, BKC International Electronics, V, 1 W silicon zener diode. 1NA. 1NA. 1NA. 1NA. . This datasheet contains the design specifications for product develop- ment. Buy MULTICOMP 1NA online at Newark element 1NA – Zener Single Diode, V, 1 W, DO, Technical Datasheet: 1NA Datasheet.

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You may be on right but it sure makes working out the correct resistor value a chore.

Sign up using Email and Password. What output volta de you require? In fact, as I increase and decrease the resistor value, the Zener voltage increases and decreases along with it.

If you want decent accuracy throw the zeners away and use some low dropout 3.

(PDF) 1N4729A Datasheet download

What’s odd is that the BZX55C is showing more-or-less the same behaviour although with different resistors. The problem is how you are modeling your circuit, because the series resistance you are using is so close the zener resistance, it must included in the circuit model.

As I pointed out in my query, I used the test currents from the relevant datasheets as a guide. I suppose the point is, at 70mA, according to the datasheet, the voltage across the zener should be 3.

1NA Datasheet(PDF) – Jinan Gude Electronic Device

Is that the dynamic resistance of the zener? No load except for the DMM. There are a couple of issues here. You do not see 3. Try to find a datasheet for your specific zeners which shows the breakdown characteristics. In my experience, low-voltage zeners anything below 5V all seem to have a very soft ‘knee’ and not particularly ‘vertical’ current-vs-voltage curve. Post as a guest Name.

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I datashedt that if you retest the “1N” parts with a test current of something like 20mA 70 ohms you may find that they’re within spec voltage-wise. If you include the dynamic resistance in the model, you must use a lower voltage for the ideal zener.

You don’t say what you saw there. Sign up using Facebook. Null 4, 10 22 I see 1j4729a edited? I wanted to confirm that I wasn’t doing anything stupid. Rather than use rules of thumb which you may or may not understand, you should first look at the data sheet of the part you’re using.

Andy aka k 10 I have a question about the regulation accuracy or lack of of a 3V6 Zener diode. Even if it specified at 70mA, there is going to be some there and in this case it is not negligible therefore it must be incorporated in to your circuit model, that why your dataheet analysis provides a different answer but adding the zener resistance to the model gives a solution that approaches more closely your result.

Therefore a better model of the zener diode is the zener diode plus the zener resistance in series. Actually, this does explain what I’m seeing and your result is pretty spot on with what I’m reading.

First this stated in the question: It’s incorrect to add a voltage at the test current because of the dynamic datawheet. Email Required, but never shown. If you want to get 3. I don’t get it, where did the 9ohms come from? Because it rises daatasheet per the quote you must have an unstable power source dafasheet 5V and this is rising as you increase the load resistance. Kvegaoro 2, 11 Double check this supply.

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Home Questions Tags Users Unanswered. Typically the dynamic resistance of the 1NA is about 5 ohms, so you could approximate it with an ideal 3.

Both Zeners dztasheet from separate suppliers. Buck8pe 8 Even so I expect that the diode you have does match its data sheet. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

As shown in the circuit below which models the behavior that you are seeing of a voltage reading of about 4V from the zener diode. How much current will dayasheet load require? For low voltage shunt regulation either use a series regulator LDO or a device such as the TL which has a band gap reference, and an opamp in a 3-poin package to create an almost perfect “Zener diode”. The two Zeners in question are:

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