Morn Sep 22, 3 0. The impurity doping concentration profile at the base-emitter junction is different from that of the base-collector junction. Sep 23, 9. Hfe is only really guaranteed to be about 50 on the first transistor and possibly about on the 2nd transistor. The Value of Customization: Transistor datasheet relay datasheet another question is, can the relay function at higher than 5volts? The circuit below is the last attempt to make this work with the two transistors.
|Published (Last):||7 June 2009|
|PDF File Size:||3.60 Mb|
|ePub File Size:||14.50 Mb|
|Price:||Free* [*Free Regsitration Required]|
Morn Sep 22, 3 0. The impurity doping concentration profile at the base-emitter junction is different from that of the base-collector junction. Sep 23, 9. Hfe is only really guaranteed to be about 50 on the first transistor and possibly about on the 2nd transistor. The Value of Customization: Transistor datasheet relay datasheet another question is, can the relay function at higher than 5volts?
The circuit below is the last attempt to make this work with the two transistors. Apr 5, 4. In general the gain will be less if you have it backwards, but for a switching application like yours, you may never notice!
Sep 22, 5. Home Questions Tags Users Unanswered. KNA works reverse bias There are nine different relays described on the datasheet which differ only in the coil voltage. Sign up using Facebook. This means that the relay is only getting about 4. Connecting the gate at 12V immediately runs the motor, so transistor piout discarded.
So, I tried to connect this transistor gate to the emitter of another KNA transistor, no luck either. Your name or email address: Apr 5, 3. Do you already have an account? Hi I tried what you said and it worked. Sep 22, 6. I checked so many times the wiring The first transistor will saturate according to the data sheet at 0. Apr 5, 1. The motor uses 0.
No, create an account now. Sep 22, 2. I suspect that your KNA is bad or low gain. Which is forward bias and which is reverse bias? Could anyone explain what I am doing wrong? Quote of the day. Last edited by a moderator: The problem is that at the very low current levels you expect with the first stage, current gain goes way down, so the overall gain is less than you expect from reading the data transistog.
When I check both datasheets their characteristics are not the same but smilar and according to the measurements all the Voltage and Current values are in range. Related Posts.
KN2222A Bipolar Transistor
All goods can be returned because of our product quality problems or product damage in transit. Payment Method 1. We accept Paypal only, it is fast, easy and safe. Product will be shipped only if full payment received, including full shipping cost. If you are bidding on multiple items we will apply the multiple item shipping discount. Please email us before you make the payment. Serious Buyer Only!
It is used in a variety of analog amplification and switching applications. PNA and other "Plastic" versions[ edit ] Replacements for the 2N are commonly available now in the cheaper TO packaging, where it is known as the PN or P2N, which has similar specifications except for the lower maximum collector current. Surface-mount versions[ edit ] Single transistors are also available in several different surface mount packages, and a number of manufacturers market surface mount packages that incorporate several 2Ntype transistors in one package as an array of transistors. The general specifications of the various variants are similar, with the biggest difference being the maximum allowable current and power dissipation. Similar types[ edit ] The BC family, including the BCA to BCC, are lower voltage, lower current, general-purpose transistors in TO packages, originating in Europe, that are often found in small-signal amplification and switching circuits of the type where the 2N might otherwise be used. They are not true replacements, but comparable devices that may be substituted only in circuits where the maximum current and voltage ratings are not exceeded.
Korea Electronics (KEC)