# Is my Arduino Uno counterfeit? **URL:** \ **Category:** IDE 1.x\ **Created:** [January 26, 2017, 8:38pm UTC](https://forum.arduino.cc/t/is-my-arduino-uno-counterfeit/433700 "2017-01-26T20:38:15Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![FireSwords](https://avatars.discourse-cdn.com/v4/letter/f/a4c791/32.png) [@FireSwords](https://forum.arduino.cc/u/FireSwords)\ **Post date:** [January 26, 2017, 8:38pm UTC](https://forum.arduino.cc/t/is-my-arduino-uno-counterfeit/433700/1 "2017-01-26T20:38:15Z")
Hello, I live in Turkey and i've bought Arduino Uno R3 from a local website. It says that it's the geninue one and I payed 23 dollars for it. I checked my board from [here](https://www.arduino.cc/en/Products/Counterfeit). And I see the regulator is quite different than it should be. In that [photo](https://www.arduino.cc/en/uploads/Products/501_Ok.jpg), there is a 501 k text on the voltage regulator. In mine, there is an [infinity sign](http://i.imgur.com/sWOGOGc.jpg). Except that, everything seems fine. [Front of the board](http://i.imgur.com/ULDCoel.jpg) [Back of the board](http://i.imgur.com/3dlYKtW.jpg) [The box](http://i.imgur.com/GusTS4x.jpg) Is that a geninue one? ---
**Author:** ![CrossRoads](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/crossroads/32/214033_2.png) [@CrossRoads](https://forum.arduino.cc/u/CrossRoads)\ **Post date:** [January 26, 2017, 8:45pm UTC](https://forum.arduino.cc/t/is-my-arduino-uno-counterfeit/433700/2 "2017-01-26T20:45:53Z")
Looks pretty good to me. They might have got a custom batch of PTC Resettable fuses. I haven't bought a new Uno in ages. (or ever - I still use a couple of Duemilanoves I got in 2010). Was the plastic case separate? ---
**Author:** ![FireSwords](https://avatars.discourse-cdn.com/v4/letter/f/a4c791/32.png) [@FireSwords](https://forum.arduino.cc/u/FireSwords)\ **Post date:** [January 26, 2017, 8:48pm UTC](https://forum.arduino.cc/t/is-my-arduino-uno-counterfeit/433700/3 "2017-01-26T20:48:49Z")
> CrossRoads: > Looks pretty good to me. They might have got a custom batch of PTC Resettable fuses. I haven't bought a new Uno in ages. (or ever - I still use a couple of Duemilanoves I got in 2010). > Was the plastic case separate? Yes, it was bundled with Arduino. It's easy to detach it. ---
**Author:** ![Ballscrewbob](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ballscrewbob/32/950458_2.png) [@Ballscrewbob](https://forum.arduino.cc/u/Ballscrewbob)\ **Post date:** [January 27, 2017, 1:41am UTC](https://forum.arduino.cc/t/is-my-arduino-uno-counterfeit/433700/4 "2017-01-27T01:41:55Z")
@ Crossroads I think a few of the newer boards come with the plastic mount as my YUN direct from Arduino.cc came with one. ---
**Author:** ![Budvar10](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/budvar10/32/215868_2.png) [@Budvar10](https://forum.arduino.cc/u/Budvar10)\ **Post date:** [January 27, 2017, 7:26am UTC](https://forum.arduino.cc/t/is-my-arduino-uno-counterfeit/433700/5 "2017-01-27T07:26:32Z")
> FireSwords: > And I see the regulator is quite different than it should be. In that [photo](https://www.arduino.cc/en/uploads/Products/501_Ok.jpg), there is a 501 k text on the voltage regulator. In mine, there is an [infinity sign](http://i.imgur.com/sWOGOGc.jpg). It is not voltage regulator but polymeric fuse for 0.5A. The original part should be Bourns MF-MSMF050 and the sign on the top should be 50xY, x is the code of year and Y code of week but sometimes lying 8 can be there (I read about it somewhere). Your board seems to be genuine. If it is counterfeit then in excellent quality. ---
**Author:** ![FireSwords](https://avatars.discourse-cdn.com/v4/letter/f/a4c791/32.png) [@FireSwords](https://forum.arduino.cc/u/FireSwords)\ **Post date:** [January 27, 2017, 8:45am UTC](https://forum.arduino.cc/t/is-my-arduino-uno-counterfeit/433700/6 "2017-01-27T08:45:27Z")
> Budvar10: > It is not voltage regulator but polymeric fuse for 0.5A. The original part should be Bourns MF-MSMF050 and the sign on the top should be 50xY, x is the code of year and Y code of week but sometimes lying 8 can be there (I read about it somewhere). > > Your board seems to be genuine. If it is counterfeit then in excellent quality. Thanks for answering. I think they started to use arduino logo printed fuses for new boards. ---
**Author:** ![oqibidipo](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/oqibidipo/32/221794_2.png) [@oqibidipo](https://forum.arduino.cc/u/oqibidipo)\ **Post date:** [January 27, 2017, 1:39pm UTC](https://forum.arduino.cc/t/is-my-arduino-uno-counterfeit/433700/7 "2017-01-27T13:39:34Z")
As you can see printed on the board and the box, it is an arduino\*\*.org\*\* version. It may slightly different components than the .cc version, but it is the real deal. ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [May 5, 2021, 4:13pm UTC](https://forum.arduino.cc/t/is-my-arduino-uno-counterfeit/433700/8 "2021-05-05T16:13:14Z")