# Trying to replace surface mount component **URL:** \ **Category:** Discrete Semiconductor Products\ **Tags:** diodes, part-identification, onsemi\ **Created:** [October 23, 2019, 12:17pm UTC](https://forum.digikey.com/t/trying-to-replace-surface-mount-component/4662 "2019-10-23T12:17:00Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![agallmon3](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@agallmon3](https://forum.digikey.com/u/agallmon3)\ **Post date:** [October 23, 2019, 12:17pm UTC](https://forum.digikey.com/t/trying-to-replace-surface-mount-component/4662/1 "2019-10-23T12:17:00Z")
I have a surface mount component that I am trying to replace. Below is an image of the part in question. I believe it is a diode of some sort but only two of the legs are actually used. ![IMG_0225](https://global.discourse-cdn.com/digikey/original/2X/f/f51b1f3b2c558364e78620fdaf110bd80fadd90a.jpeg) See below image of xray of diode. (as can be seen only two legs are actually used) ![IMG_0226](https://global.discourse-cdn.com/digikey/original/2X/4/431128e9aa5f59d3bd8cd79e97bb89ff2035b98b.jpeg) ---
**Author:** ![Robert\_Fay](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/robert_fay/32/6529_2.png) [@Robert\_Fay](https://forum.digikey.com/u/Robert_Fay)\ **Post date:** [October 23, 2019, 2:30pm UTC](https://forum.digikey.com/t/trying-to-replace-surface-mount-component/4662/2 "2019-10-23T14:30:38Z")
The markings appear to belong to Diode part [MMBZ5248BLT1GOSCT-ND](https://www.digikey.com/product-detail/en/on-semiconductor/MMBZ5248BLT1G/MMBZ5248BLT1GOSCT-ND/1139861) The use is also consistant with the part being a single diode as called out in the [data sheet. ![image](https://global.discourse-cdn.com/digikey/original/2X/8/8fcbd27252ada4086292e903c2c1ee18573640d9.png) ![image](https://global.discourse-cdn.com/digikey/original/2X/2/2d340f2515992d155c23e0afa0d15caec6306ab5.png) ](https://www.onsemi.com/pub/Collateral/MMBZ5221BLT1-D.PDF) -Robert