# About the burnt component on the NodeMCU **URL:** \ **Category:** General Electronics\ **Created:** [July 15, 2025, 5:26pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847 "2025-07-15T17:26:26Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![cagatay-61](https://avatars.discourse-cdn.com/v4/letter/c/b9e5f3/32.png) [@cagatay-61](https://forum.arduino.cc/u/cagatay-61)\ **Post date:** [July 15, 2025, 5:26pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/1 "2025-07-15T17:26:26Z")
On my NodeMCU, the wire from the 5V pin got desoldered and touched the GND pin, which caused the component shown in the image to burn out. Does anyone know what this burned component is? ![görüntü](https://europe1.discourse-cdn.com/arduino/original/4X/1/e/d/1edcaf0e4f246556d2fa4655a1363fa9f179ca23.jpeg) ---
**Author:** ![LarryD](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/larryd/32/215550_2.png) [@LarryD](https://forum.arduino.cc/u/LarryD)\ **Post date:** [July 15, 2025, 5:31pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/2 "2025-07-15T17:31:19Z")
- Looks like it might be a diode. - If it went up in smoke, something is seriously wrong elsewhere on the PCB. ---
**Author:** ![cagatay-61](https://avatars.discourse-cdn.com/v4/letter/c/b9e5f3/32.png) [@cagatay-61](https://forum.arduino.cc/u/cagatay-61)\ **Post date:** [July 15, 2025, 5:36pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/3 "2025-07-15T17:36:26Z")
I removed the burnt component and shorted its two pads, and my project worked perfectly. I just want to replace the burnt component with a new one to ensure protection for the circuit. ---
**Author:** ![ahsrabrifat](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ahsrabrifat/32/1126412_2.png) [@ahsrabrifat](https://forum.arduino.cc/u/ahsrabrifat)\ **Post date:** [July 15, 2025, 5:37pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/4 "2025-07-15T17:37:19Z")
> [@cagatay-61](#): > > On my NodeMCU, the wire from the 5V pin got desoldered and touched the GND pin, which caused the component shown in the image to burn out. Does anyone know what this burned component is? Schottky diode, most probably. ---
**Author:** ![cagatay-61](https://avatars.discourse-cdn.com/v4/letter/c/b9e5f3/32.png) [@cagatay-61](https://forum.arduino.cc/u/cagatay-61)\ **Post date:** [July 15, 2025, 5:43pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/5 "2025-07-15T17:43:51Z")
ChatGPT said it’s a Schottky diode. I have an MBR560 Schottky diode on hand. Would it be okay to use it? ---
**Author:** ![LarryD](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/larryd/32/215550_2.png) [@LarryD](https://forum.arduino.cc/u/LarryD)\ **Post date:** [July 15, 2025, 5:44pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/6 "2025-07-15T17:44:05Z")
> [@cagatay-61](#): > > I removed the burnt component and shorted its two pads, and my project worked perfectly - **WOW !** You are very lucky, maybe buy a lottery ticket 😎 - Now something made this fail, perhaps your input voltage was/is too high or there is still a problem that will raise its ugly head later 😵‍💫 * * * - Confirm one side on the component goes to the Vin pin. Google SMD diode 0805 and 0603 - What is the pad spacing ? ---
**Author:** ![cagatay-61](https://avatars.discourse-cdn.com/v4/letter/c/b9e5f3/32.png) [@cagatay-61](https://forum.arduino.cc/u/cagatay-61)\ **Post date:** [July 15, 2025, 5:53pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/7 "2025-07-15T17:53:22Z")
I have an MBR560 Schottky diode on hand. Would it be okay to use it? ---
**Author:** ![sonofcy](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sonofcy/32/1283617_2.png) [@sonofcy](https://forum.arduino.cc/u/sonofcy)\ **Post date:** [July 15, 2025, 6:12pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/8 "2025-07-15T18:12:44Z")
Depends on the spec of the burnt out diode and the spec of the diode you have. This component is VERY precise. If you can't read the diode code or there is nothing on the board, google a board datasheet/wiring diagram especially the power tree. The diode will be attached to VIN. The MBR560 is 5Ampls and 60Volts, BOTH are too high. A 1N5817 is 1A at 5V. You can find other similar parts with google. ---
**Author:** ![cagatay-61](https://avatars.discourse-cdn.com/v4/letter/c/b9e5f3/32.png) [@cagatay-61](https://forum.arduino.cc/u/cagatay-61)\ **Post date:** [July 15, 2025, 6:24pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/9 "2025-07-15T18:24:45Z")
Thanks. ---
**Author:** ![sonofcy](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/sonofcy/32/1283617_2.png) [@sonofcy](https://forum.arduino.cc/u/sonofcy)\ **Post date:** [July 15, 2025, 6:41pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/10 "2025-07-15T18:41:31Z")
Most common part is an SMA pkg SS14. 1A fwd current, 40V reverse voltage. A Forward Voltage Drop of about 0.4V at 1A. ---
**Author:** ![LarryD](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/larryd/32/215550_2.png) [@LarryD](https://forum.arduino.cc/u/LarryD)\ **Post date:** [July 15, 2025, 6:49pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/11 "2025-07-15T18:49:43Z")
- As a guess, the OP’s component is a 0805 footprint. - If the OP has a regular **silicon** diode in 0805, they can try that. Maybe try a component from a donor board. - **Remember** , diodes need to be installed in the right direction. ### Method for easy removal of a component. ![G](https://europe1.discourse-cdn.com/arduino/original/4X/5/d/b/5db2742b143b6c22824cfb05550a2d4d6712f683.jpeg) [![](https://europe1.discourse-cdn.com/arduino/original/4X/c/6/a/c6a6196d15ea1cc3458faec99ad78545b637dacc.jpeg "Video 0010") ](https://www.youtube.com/watch?v=9ybpF6mgKzk) [![](https://europe1.discourse-cdn.com/arduino/original/4X/0/8/8/088327a8983fbf285c21f0da267c6e00ac507285.jpeg "Video 0007") ](https://www.youtube.com/watch?v=bo2cZun0zyM) ---
**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:** [January 11, 2026, 6:49pm UTC](https://forum.arduino.cc/t/about-the-burnt-component-on-the-nodemcu/1395847/12 "2026-01-11T18:49:47Z")
Closed on January 11, 2026, 6:49pm UTC This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.