# No unipolar capacitor component **URL:** \ **Category:** Help\ **Created:** [November 17, 2019, 9:46am UTC](https://librepcb.discourse.group/t/no-unipolar-capacitor-component/157 "2019-11-17T09:46:40Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![jpparent](https://avatars.discourse-cdn.com/v4/letter/j/7bcc69/32.png) [@jpparent](https://librepcb.discourse.group/u/jpparent)\ **Post date:** [November 17, 2019, 9:46am UTC](https://librepcb.discourse.group/t/no-unipolar-capacitor-component/157/1 "2019-11-17T09:46:40Z")
Hi, I begin to use LibrePcb, in schematic editor I want to add capacitor unipolar component. I use add component Capacitor/Unipolar capacitor but there is no device avaliable, I can just add bipolar capacitor. Other question on diode, there is an available device BAS21 [SOT23-3] but it hasn’t the appearance of a diode on the board and 3 pads are displayed. Thanks for your help. Jean Paul ---
**Author:** ![carlossp](https://avatars.discourse-cdn.com/v4/letter/c/f4b2a3/32.png) [@carlossp](https://librepcb.discourse.group/u/carlossp)\ **Post date:** [November 20, 2019, 12:40pm UTC](https://librepcb.discourse.group/t/no-unipolar-capacitor-component/157/2 "2019-11-20T12:40:12Z")
Hi, My version 0.1.2 has the Capacitor Unipolar so, if you have this same version you also should have one. If don’t, try re-install with version 0.1.2 About the Diode BAS21 it is correct. This diode has 3 terminals. ---
**Author:** ![jpparent](https://avatars.discourse-cdn.com/v4/letter/j/7bcc69/32.png) [@jpparent](https://librepcb.discourse.group/u/jpparent)\ **Post date:** [November 21, 2019, 8:11pm UTC](https://librepcb.discourse.group/t/no-unipolar-capacitor-component/157/3 "2019-11-21T20:11:09Z")
Hi, Thanks for your response Carlos, unfortunaly I haved already installed a linux release 0.1.2. ![image](https://global.discourse-cdn.com/free1/uploads/librepcb1/original/1X/8e87700c744ae97da3f148196ce6052865a3f9a5.png) . No device for standard diode or zener diode? A similar problem with transistor, there is no PNP or NPN device. Jean Paul ---
**Author:** ![dbrgn](https://yyz2.discourse-cdn.com/free1/user_avatar/librepcb.discourse.group/dbrgn/32/25_2.png) [@dbrgn](https://librepcb.discourse.group/u/dbrgn)\ **Post date:** [November 24, 2019, 10:38pm UTC](https://librepcb.discourse.group/t/no-unipolar-capacitor-component/157/4 "2019-11-24T22:38:34Z")
Hi! 2 days ago I created a library pull request with molded polarized capacitors (CAPPM). Those are often used for tantalum capacitors. Maybe it helps? > A lot of parts (even very basic ones) are still missing because nobody created them yet. For other devices, feel free to create devices according to the [library conventions](https://docs.librepcb.org/#libraryconventions) and [contribute them to the standard library](https://librepcb.discourse.group/t/how-to-contribute-to-libraries/140/3)! If you create devices or packages that are very similar and that could be generated, check out the [https://github.com/LibrePCB/librepcb-parts-generator](https://github.com/LibrePCB/librepcb-parts-generator) project. ---
**Author:** ![jpparent](https://avatars.discourse-cdn.com/v4/letter/j/7bcc69/32.png) [@jpparent](https://librepcb.discourse.group/u/jpparent)\ **Post date:** [December 1, 2019, 5:56pm UTC](https://librepcb.discourse.group/t/no-unipolar-capacitor-component/157/5 "2019-12-01T17:56:56Z")
Hi Danilo, Thanks you for your response.I understand It miss a lot of parts. I’m not an expert in electronic I just try to build electronic schema from physical card to repair it. I have just created my little libray an add a Relay device. If I progress I 'll try to use perts generator. Jean Paul ---
**Author:** ![dbrgn](https://yyz2.discourse-cdn.com/free1/user_avatar/librepcb.discourse.group/dbrgn/32/25_2.png) [@dbrgn](https://librepcb.discourse.group/u/dbrgn)\ **Post date:** [December 10, 2019, 9:33am UTC](https://librepcb.discourse.group/t/no-unipolar-capacitor-component/157/6 "2019-12-10T09:33:45Z")
Molded polarized chip capacitor packages (e.g. tantalum) have been merged! > There are no devices for them _yet_, but adding your own devices is very simple. Edit: AVX F93 series capacitors: >