SOD-323 Component Package

SOD-323 (Small-outline Diode 323) is a family of 2-lead SMD component packages, commonly used for diodes.

The are four variants, with the key differences being:

• SOD-323: Bent leads.
• SOD-323F: Flat leads (better heatsinking).
• SOD-323FL: Flat leads, with one longer than the other (even better heatsinking).
• SOD-323HE: ?

Solderability: Reflow is recommended. Easy to solder by hand.

Pitch: 2.2mm¹

Similar To:

• SOD-123 (larger)
• SOD-523 (smaller)
• SOD-723 (even smaller)
• SOD-923 (smallest)

SOD-323 (Standard Variant)

SOD-323 is a 2 lead, SMD component package commonly used for diodes. Without any other suffixes, SOD-323 typically refers to bent lead variant, also known as SC-76 (JEITA).¹

Synonyms:

• SC-76 (JEITA)

3D model of the SOD-323 component package.

It has the following core dimensions:

Property	Dimension (nominal)1
Body Length	1.7mm
Body Width	1.25mm
Body Height	0.95mm

Dimensions for the SOD-323 component package¹.

Thermal Resistance:

• $R_{\theta(ja)} = 450K/W$ (FR4 PCB, single-sided copper, standard footprint)²
• $R_{\theta(ja)} = 210K/W$ (FR4 PCB, single-sided copper, standard footprint but with $1cm^2$ mounting pad for cathode)²
• $R_{\theta(jc)} = 90K/W$ (from junction to solder point)²

Typical PCB Land Area: $13.75mm^2$ (5x2.75mm)¹

SOD-323F (Flat Lead Variant)

The SOD-323F is a variant which has flat leads instead of the bent leads in the standard SOD-323. It has the same body dimensions as the standard SOD-323.

Synonyms

• SC-90: JEITA (EIAJ).
• SOD-323F-2: Mouser³.
• SOD-323FL: Rohm⁴.
• UMD2: Rohm⁴.

WARNING: Rohm uses the name SOD-323FL to refer to the same package as many other manufacturers call SOD-323F⁴. Central Semiconductor also uses the package name SOD-323FL, but this refers to a different variant with different sized leads (see below).

3D render of the SOD-323F component package⁵.

Package dimensions of the SOD-323F component package⁶.

SOD-323FL (Central Semiconductor Variant)

Central Semiconductors version of the SOD-323FL (the FL is presumably an acronym for Flat Leads) is another variant of the SOD-323 with flat leads, except one of the leads is much longer than the other⁷. This improves the heatsinking of the package even more than that of the SOD-323F variant.

Package dimensions of the Central Semiconductor SOD-323FL component package⁷.

Recommended land pattern for the Central Semiconductor SOD-323FL component package⁷.

SOD-323HE

I’m not sure what the distinguishing features of the SOD-323HE package are. It appears to be a SOD-323 with a flat lead style.

Synonyms:

• SC-108B (JEITA)⁸
• TUMD2M (Rohm)⁸

3D model of the SOD-323HE component package⁸.

Package dimensions of the SOD-323HE component package⁸.

Footnotes

1. NXP (2019, July 30). SOD323 plastic, surface-mounted package; 2 leads; 1.3 mm pitch; 1.7mm x 1.25 mm x 0.95 mm body (datasheet). Retrieved 2022-03-25, from https://www.nxp.com/docs/en/package-information/SOD323.pdf. ↩ ↩² ↩³ ↩⁴ ↩⁵

2. Nexperia. PMEG2020AEA: 20 V, 2 A very low VF MEGA Schottky barrier rectifier in SOD323 (SC-76) package (datasheet). Retrieved 2022-03-25, from https://assets.nexperia.com/documents/data-sheet/PMEG2020AEA.pdf. ↩ ↩² ↩³

3. Mouser. Nexperia PMEG2020EJF (product page). Retrieved 2022-03-28, from https://www.mouser.com/ProductDetail/Nexperia/PMEG2020EJF?qs=45Avz0nZxhu5ApwA0R%252B84A%3D%3D. ↩

4. Rohm Semiconductor (2021, Jan 8). _UDZV: Zener Diode (datasheet). Retrieved 2022-03-28, from https://fscdn.rohm.com/en/products/databook/datasheet/discrete/diode/zener/udzvte-1733b-e.pdf. ↩ ↩² ↩³

5. Nexperia. Packages -> SC-90 (SOD-323F). Retrieved 2022-03-28, from https://www.nexperia.com/packages/SOD323F.html. ↩

6. Diodes Incorporated. SOD-323F: Package Information (datasheet). Retrieved 2022-03-27, from https://www.diodes.com/assets/Package-Files/SOD323F.pdf. ↩

7. Central Semiconductor (2013, Mar 27). Package Details: SOD-323FL Case. Retrieved 2022-03-27, from https://www.centralsemi.com/PDFS/CASE/SOD-323FLPD.PDF. ↩ ↩² ↩³

8. Rohm Semiconductor (2016). RB558VAM150: Schottky Barrier Diode (datasheet). Retrieved 2022-03-27, from https://www.mouser.com/datasheet/2/348/rb558vam150tr_e-1870568.pdf. ↩ ↩² ↩³ ↩⁴