Kt Kingtronics Difference Between Melf and SMA Package

23 Nov 2016

Do you know what’s the difference between Melf and SMA Package? Let us take a comparison, you can easy to get features of them. Please refer to the below table.

Comparison between Melf and SMA package

Build in massive copper plugs

Build in copper leadframe technology

Superior thermal resistance due to massive plugs removing heat easily

Leadframe technology possess higher thermal resistance

Superior surge current rating due to high heated capacity of plugs, absorbing easily short lasting high energy surges

Leadframe technology has got less heat capacity

Tends to “roll away” during assembly, therefore better fitted for wave soldering
(where devices are glued to the PCB)

Applicable to all kinds of welding such as reflow or wave soldering

More sensitive against mechanical forces applied to the plugs

Leadframe technology provides better stress relief, therefore less sensitivity against mechanical stress to the leads

Parameters of a 1A/1000V
Standard Rectifier–SM4007

Parameters of 1A/1000V          
Standard Rectifier–S1M

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Tel: (86) 769 8118 8110
Tel: (852) 8106 7033
Fax: (852) 8106 7099
E-mail: info@kingtronics.com
Skype: kingtronics.sales
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Web: www.Kingtronics.com


Kingtronics International Company was established in 1995 located in Dongguan City of China to handle all sales & marketing for factories located in Chengdu, Sichuan and Zhaoqing, Guangdong, China. In 1990, we established the first factory to produce trimming potentiometer and in 1999 we built up new factory in Zhao Qing, Guangdong. Now with around 850 workers, Kingtronics produce trimming potentiometers, dipped tantalum capacitors, multilayer ceramic capacitors, and diode & bridge rectifier. We sell good quality under our brand Kingtronics, and Kt, King, Kingtronics are our three trademarks. All our products are RoHS compliant, and our bridge rectifier have UL approval. Please visit our Products page, you could please download all our PDF datasheet and find cross reference for our Trimming Potentiometer and capacitors.

Tantalum and Ceramic Capacitors Cross Reference ↓ Download
Diodes & Rectifiers List(PDF: 97KB) ↓ Download
Trimming Potentiometer Cross Reference ↓Download

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