# Not very good at this **URL:** \ **Category:** Discrete Semiconductor Products\ **Tags:** diodes, part-identification\ **Created:** [June 13, 2023, 11:52pm UTC](https://forum.digikey.com/t/not-very-good-at-this/31783 "2023-06-13T23:52:23Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![applianceplus1](https://avatars.discourse-cdn.com/v4/letter/a/f4b2a3/32.png) [@applianceplus1](https://forum.digikey.com/u/applianceplus1)\ **Post date:** [June 13, 2023, 11:52pm UTC](https://forum.digikey.com/t/not-very-good-at-this/31783/1 "2023-06-13T23:52:23Z")
Could you please help match these 3 things ![20230612_220150](https://global.discourse-cdn.com/digikey/original/3X/0/9/09b69a83689f4f7f435b119eaba2d2c4b7d66c94.jpeg) ![20230612_220200](https://global.discourse-cdn.com/digikey/original/3X/f/3/f3992283d7eb2f6b1ed28594848335d1abf6e2a0.jpeg) ---
**Author:** ![ryan\_urness](https://avatars.discourse-cdn.com/v4/letter/r/aca169/32.png) [@ryan\_urness](https://forum.digikey.com/u/ryan_urness)\ **Post date:** [June 14, 2023, 12:20am UTC](https://forum.digikey.com/t/not-very-good-at-this/31783/2 "2023-06-14T00:20:46Z")
Hello, Well the 4 lead device was available to locate but the other 2 are proving difficult. Hopefully we can find those other 2 but here is the link for the replacement 4 lead bridge rectifier. 4 lead device > **[Discrete Semiconductor Products | Diodes | Bridge Rectifiers | Digi-Key...](https://www.digikey.com/en/products/filter/diodes/bridge-rectifiers/299?s=N4IgTCBcDaIOYCMCuAOA1gWxAXQL5A)** > > Diodes Bridge Rectifiers are in stock at DigiKey. Order Now! Discrete Semiconductor Products ship same day Thank you Ryan Urness ---
**Author:** ![applianceplus1](https://avatars.discourse-cdn.com/v4/letter/a/f4b2a3/32.png) [@applianceplus1](https://forum.digikey.com/u/applianceplus1)\ **Post date:** [June 14, 2023, 8:26pm UTC](https://forum.digikey.com/t/not-very-good-at-this/31783/3 "2023-06-14T20:26:20Z")
[[//cdck-file-uploads-global.s3.dualstack.us-west-2.amazonaws.com/digikey/original/3X/d/3/d3e4e1842225f188ecc84f6febba1a6068e305d1.png](https://global.discourse-cdn.com/digikey/original/3X/d/3/d3e4e1842225f188ecc84f6febba1a6068e305d1.png)] Would you be able to help find them more how do i test them or how can we test these ---
**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\ **Post date:** [June 14, 2023, 9:21pm UTC](https://forum.digikey.com/t/not-very-good-at-this/31783/4 "2023-06-14T21:21:59Z")
For the device with the “U1560” marking from ON Semiconductor (now “onsemi”), it is this: [MUR1560G](https://www.digikey.com/en/products/detail/onsemi/MUR1560G/919902) (out of stock at this moment) The [VS-E5TH1506-M3](https://www.digikey.com/en/products/detail/vishay-general-semiconductor-diodes-division/VS-E5TH1506-M3/13535304) looks like a pretty decent sub for it. The other part is an International Rectifier part, most likely a MOSFET, but I haven’t figured out the proper part number yet. ---
**Author:** ![applianceplus1](https://avatars.discourse-cdn.com/v4/letter/a/f4b2a3/32.png) [@applianceplus1](https://forum.digikey.com/u/applianceplus1)\ **Post date:** [June 14, 2023, 9:48pm UTC](https://forum.digikey.com/t/not-very-good-at-this/31783/5 "2023-06-14T21:48:58Z")
but can i test these what readings shiuld i get ---
**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\ **Post date:** [June 15, 2023, 3:07pm UTC](https://forum.digikey.com/t/not-very-good-at-this/31783/6 "2023-06-15T15:07:57Z")
Hi [applianceplus1](https://forum.digikey.com/t/not-very-good-at-this/31783/5), For the MUR1560G, you just perform a standard diode test, so with a multimeter in Diode Test mode, you should get a small forward voltage drop (anywhere from 0.2V to 1.0V) when connected one way, and an over limit reading when connected the other way. For the other TO-220 part from International Rectifier (now part of Infineon), if it is a MOSFET there will likely be a circuit board designator of “Qx” (such as Q1, Q2, Q3, etc.) next to the part. Assuming it is a MOSFET, you would need to perform a MOSFET test. It is a bit too complicated to describe the process here, so I would suggest a Google search for example instruction videos. Unfortunately, since we have not identified that particular part yet, we don’t know whether it is an N-channel or P-channel type (most likely it’s an N-Channel, as they are the more frequently used type) and therefore we can not verify the pinout. ---
**Author:** ![applianceplus1](https://avatars.discourse-cdn.com/v4/letter/a/f4b2a3/32.png) [@applianceplus1](https://forum.digikey.com/u/applianceplus1)\ **Post date:** [June 15, 2023, 6:58pm UTC](https://forum.digikey.com/t/not-very-good-at-this/31783/7 "2023-06-15T18:58:40Z")
This is confusing ---
**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\ **Post date:** [June 15, 2023, 8:02pm UTC](https://forum.digikey.com/t/not-very-good-at-this/31783/8 "2023-06-15T20:02:22Z")
I’m not clear what you are confused about, but to try to clarify, first, you will need a multimeter with a diode test feature, such as any of [these](https://www.digikey.com/short/bmjmb57m). You will probably need to desolder the components from the circuit board so as to isolate them from the potential interaction of other components on the board. You can then test the components, as seen [here](https://www.youtube.com/watch?v=mMXDa5hVzXA) and [here](https://www.youtube.com/watch?v=IF740E5bm84) for the diode and the MOSFET, respectively. ---
**Author:** ![applianceplus1](https://avatars.discourse-cdn.com/v4/letter/a/f4b2a3/32.png) [@applianceplus1](https://forum.digikey.com/u/applianceplus1)\ **Post date:** [June 15, 2023, 8:17pm UTC](https://forum.digikey.com/t/not-very-good-at-this/31783/9 "2023-06-15T20:17:04Z")
Right I don’t think I have that ---
**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\ **Post date:** [June 15, 2023, 8:26pm UTC](https://forum.digikey.com/t/not-very-good-at-this/31783/10 "2023-06-15T20:26:25Z")
A decent multimeter is one of the most essential tools for testing circuit boards. Without it, it’s nearly impossible to do so. If you have a multimeter and you’re not sure if it has the diode test feature, look for a symbol like that pointed to in the image below: ![image](https://global.discourse-cdn.com/digikey/original/3X/3/0/3057f8f5962d014d9fadf8211202f4d7c554dfc5.png)