Kt Kingtronics Contrast between GPP (Glass Passivated) and OJ (Pickling) of TVS Devices

23 Mar 2015

1. Construction:                                         
(Figure 1) OJ structure
(FIG. 2) GPP structure

2. Process:
Protection of the biggest differences between the two products in the PN junction.
OJ structure of the product, the use of glue to protect knot, then at 200 degrees temperature curing. P-N junction obtain protection voltage.
GPP structure of the product, the chip PN junction is under the protection of the passivation glass, sintered glass frit is 800 degrees around the melting, the glass layer is formed after cooling. This glass layer and melt into one chip, can not be separated by mechanical means.
And OJ protection glue, just covering the PN junction surface.

3. Feature Comparison:
1) due to the different structure, when external stress (for example, were angled handle), thermal shock devices, under the plastic package if there is leakage, so the situation. OJ products, the protection of plastic and silicon is not firmly bound to protect a bad situation occurs, the device appears certain failure rate. GPP product similar situation does not occur.
2) High GPP diode reliability. First, GPP at room temperature, leakage than OJ's going small. It is particularly important HTRB (high temperature reverse bias, is a measure of reliability of the most important symbol of parameters) GPP much better, OJ products can only withstand HTRB 100 degrees around. The GPP when the temperature reaches 150 degrees, still performed very well.

4. Description:
OJ previously packaged products is limited to the axial DO series, so many customers are using on-chip package (SMD) products. Because chip product, then only use GPP chip package.
But now, there have been a chip package OJ products. So be sure to pay attention to distinguish the selection.

Supplier Company: Kingtronics International Company        www.kingtronics.com
ISO 9001: 2008 manufacturer, 2 factories, ISO & UL & SGS certified

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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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