SOD-128 Component Package

SOD-128 is a package used by a few manufacturers for diodes. I could not find any JEITA (EIAJ) code (e.g. SC-xxx) for this package. ST Microelectronics calls this package the SOD-128 FLAT (presumably because it has flat leads, as opposed to many SOD packages which by default have gull-wing leads, and only offer flat variants once you add a F suffix)¹. There does not appear to be any difference between the ST Microelectronics SOD-128 FLAT package and the SOD-128 as labelled by Rohm and Nexperia.

Synonyms

• CFP5 (Nexperia)²
• PMDTM (Rohm Semiconductor)³
• SOD-128-2 (Mouser)⁴
• SOD-128 FLAT (ST Microelectronics)¹

Thermal Resistance

• $R_{JA} = 200^{\circ}{\rm C}/W$ (standard land pattern, see below)
• $R_{JA} = 120^{\circ}{\rm C}/W$ (mounting pad for cathode 1cm²)
• $R_{JA} = 60^{\circ}{\rm C}/W$ (mounted on ceramic PCB with standard footprint)

3D Render

A 3D render of the SOD-128 component package.

Dimensions

The main dimensions of the SOD-128 package are:

• Length (incl. leads, avg.): 4.70mm³
• Width (avg.): 2.50mm³
• Height (avg.): 0.95mm³

The below diagram shows these dimensions:

The package outline for the SOD-128 component package.

Recommended Land Pattern

The recommended land pattern for the SOD-128 component package.

The land area is $21.1mm^2$ (6.2x3.4mm)².

Common Uses

• General purpose diodes
• TVS diodes

References

Footnotes

1. ST Microelectronics (2020, Jan). SM6FxxAY: Automotive 600 W TVS in SOD128 Flat (datasheet). Retrieved 2022-03-28, from https://www.st.com/resource/en/datasheet/sm6f11ay.pdf. ↩ ↩²

2. Nexperia. SOD128: plastic, surface mounted package; 2 terminals; 4 mm pitch; 3.8 mm x 2.6 mm x 1 mm body (package information). Retrieved 2022-03-28, from https://assets.nexperia.com/documents/package-information/SOD128.pdf. ↩ ↩²

3. Rohm Semiconductor (2019, May 28). RBR5LAM30B: Schottky Barrier Diode (datasheet). Retrieved 2022-03-28, from https://fscdn.rohm.com/en/products/databook/datasheet/discrete/diode/schottky_barrier/rbr5lam30btr-e.pdf. ↩ ↩² ↩³ ↩⁴

4. Mouser. ROHM Semiconductor RB088LAM-30TR (product page). Retrieved 2022-03-28, from https://www.mouser.com/ProductDetail/ROHM-Semiconductor/RB088LAM-30TR?qs=F5EMLAvA7IAOGmDi0yYqWA%3D%3D. ↩