Growing in the southern region of China, the sudden drop in temperature, maybe you think it is amazing. People could still wear T-shirts and shorts last month. This week, cold air hit and dropped by 10℃-20℃ overnight.

Last month, we had a warm activity in Guangxi Province, where we shared some clothes, shoes and blankets for children in mountainous areas. Now they can wear them all, and also can cover the blankets. We hope that students in schools will be warmer this winter.

Recently, we have received many letters from these students, some students express gratitude, while others tell us their needs. Kingtronics will do our best to meet the needs of students and provide them with a happy, healthy, and joyful childhood

Kingtronics Angle Charity Social Activity in 2023 Autumn

The operations of many domestic enterprises have been affected, during the 3 years of the epidemic. But, entrepreneurs are paying more attention to philanthropy.

Our company mainly focuses on the “left-behind" children. These children will share interesting thing with us sometime by email. According to the need of the children, we also will provide some learning tools such as stationery, writing and so on.
Welcome to join hands with us to share love

The PCB is prone to bending and warping when it passes through the reflow furnace, which makes people very distressed. So how to prevent PCB board from bending and warping through the reflow furnace? Let's explain it to you:

1.Reduce the influence of temperature on PCB stress
Since "temperature" is the main source of plate stress, as long as the temperature of the reflow furnace is reduced or the heating and cooling rate of the plate in the reflow furnace is slowed down, the occurrence of plate bending and plate warping can be greatly reduced. However, there may be other side effects, such as solder short circuit.

2.Use high Tg plate
Tg is the glass transition temperature, that is, the temperature at which the material changes from glass to rubber. The lower the Tg value of the material, the faster the plate begins to soften after entering the reflow furnace, and the longer the time to become soft rubber, the more serious the deformation of the plate. The use of plates with higher Tg can increase their ability to withstand stress and deformation, but the price of materials is relatively high.

3.Increase the thickness of the circuit board
In order to achieve the goal of thinner, many electronic products have left 1.0mm, 0.8mm and even 0.6mm thick plates. It is really a bit difficult to keep the plates from deforming after the reflow furnace. It is suggested that if there is no requirement of thinner, the plates can preferably use 1.6mm thick plates, which can greatly reduce the risk of bending and deformation.

4.Reduce the size of circuit board and the number of panels
Since most of the reflow furnaces use chains to drive the circuit board forward, the larger size of the circuit board will be dented and deformed in the reflow furnace because of its own weight, so try to put the long side of the circuit board on the chain of the reflow furnace as far as possible, which can reduce the dented deformation caused by the weight of the circuit board itself. This is also the reason for the reduction of the number of panels, Try to use the narrow edge perpendicular to the direction of furnace passage to achieve the minimum concave deformation.

5.Used reflow carrier
If the above methods are difficult to achieve, the last is to use the reflow carrier/template to reduce the deformation. The reason why the reflow carrier can reduce the bending and warping of the plate is that the template is expected to hold the circuit board until the temperature of the circuit board is lower than the Tg value and begins to harden again, and can maintain the original size..

If the single-layer template cannot reduce the deformation of the circuit board, it is necessary to add another layer of cover to clamp the circuit board with the upper and lower layers of templates, which can greatly reduce the deformation of the circuit board through the reflow furnace. However, the template is very expensive, and it has to be placed and recycled manually.

6.Use Router instead of V-Cut
Since V-Cut will destroy the structural strength of the panels between the circuit boards, try not to use the sub-panels of V-Cut or reduce the depth of V-Cut.

Kingtronics Components to use on your board:
GKT-Aluminum Electrolytic Capacitors, radial, axial, SMD, snap-in, Lug, screw types
Bridge Rectifiers: MB1S-MB10S, KBPC6005-KBPC610, KBP2005-KBP210
Diodes & Transistors: M7, 1N4007, LL4148, BZV55C, Fast Recovery Diodes
DKT-Super Capacitors: 2.7V, 3V Radial, Snap-in, Screw Type and 5.5V Coin Type
MLCC and Tancap: Multilayer Ceramic Capacitors and Tantalum Capacitors
KKT-Ceramic Capacitors: SMD 3mm Trimmer Capacitor 3pF, 6pF,10pF, 20pF, 30pF
RKT-Trimming Potentiometers: Rectangular, SMD, Square 3006, 3362, 3386, 3590
QKT-Crystals: Crystals and Oscillators size 1612 to 7050,Tuning Fork 32.768KHz
SKT-Surge Arresters: Axial and SMD Gas 2-Electrode and 3-Electrode Arresters
NKT-NTC Thermistors: NTC Negative Temperature Coefficient Thermistor
XKT-Varistors: Metal Oxide Varistor 05D, 07D, 10D, 14D, 20D
WKT-Switches: DIP and SMD Tact Switches
FKT-Film Capacitors: Metallized Polyester and Polypropylene Film Capacitor


Customers who pay attention to us all know that, we are keeping join the public benefit activities for a long time. In Guangxi Province, Some students are funded by us from primary school until graduated from college. We are willing to share the love to those children. Last month, our company also donated some donations, books, stationery and clothes to Guangxi Primary School as much as possible.

Those student in a small mountain village, they need you care. Offer your love to them, what you do is only a pencil, a bag, some coat that you don't want to dress in, or a dollar. 
Thank you in advance.


Kingtronics newly compiled passive components full Range Catalog, including our HOT best seller product with excellent quality and price.

Welcome check & contact Kingtronics sales team for further best quotation. 
Kingtronics passive components full Range Catalog :
Kingtronics youtube channel for more product information :

☆Aluminum Electrolytic Capacitor—GKT:
Polymer Solid type, Radial Type, SMD Type, Axial Type, Snap-in, Lug and Screw Type

☆Super capacitor—DKT:
Coin-type, Radial type, Snap-in and Screw Type, Combined Type (Double Layer)

☆Film capacitor—FKT:
Box Type Metallized Polyester Film Capacitor, Polypropylene Film Capacitor, X2 Metallized Polypropylene Film Capacitor

☆SMD 3mm Chip Ceramic Trimmer Capacitor--KKT

☆Multilayer Ceramic Capacitors
MKT-Radial Type,
AKT -Axial Type,
LKT -SMD Type Low Voltage
HKT -SMD Type High Voltage
BKT -SMD Type High Q Low ESR RF

☆Tantalum Capacitors
TKT -Radial Type
PKT -SMD Type Solid Polymer

According to IEC 60384-14, capacitors are divided into X capacitors and Y capacitors
1. X capacitance refers to the capacitor between L and N
2. Y capacitance refers to the capacitor between L-G/N-G. (L=Line, N=Neutral, G=Ground)

The capacitance of X is divided into X1, X2 and X3. The main differences are as follows:
1. X1 high voltage resistance is greater than 2.5kV, less than or equal to 4kV
2. High voltage resistance of X2 is less than or equal to 2.5kV
3. High voltage resistance of X3 is less than or equal to 1.2kV

The capacitance of Y is further divided into Y1, Y2, Y3 and Y4. The main differences are as follows:
1. Y1 high voltage resistance is greater than 8 kV;
2. Y2 resistance to high voltage greater than 5 kV;
3. Y3 resistant to high pressure N/A;
4. Y4 high voltage resistance is greater than 2.5kV

Kigntronics website:

These capacitors are based around the use of a polyester dielectric. As with any capacitor, polyester capacitors have their own characteristics. This means that they are suited to some applications more than others. Mylar capacitors have low levels of moisture absorption.

Mylar is an excellent electrical insulating material, with a high breakdown voltage, very high DC resistance, DC blocking and  Ultra-low ESR.
FKT-MP Mylar Polyester Film Capacitor:

Kingtronics FKT-MP series Polyester Film Capacitor: Mylar Film polyethylene terephthalate (PET) Capacitors

Kingtronics join in a charitable donation over 20 years, and some beneficiary always write to us, We are also happy to receive feedback whatever about study or life. Please keep in touch!

We are doing our best and using our voice to create as much positive change, hope the society will take more care of vulnerable Groups.

We know we have a good heart and we feel like to making the help for some adolescent who is left-behind children. If you have the empathy to empathize with a good heart, probably you can share the same kind of morals I do.

Chinese New Year is approaching.
Kingtronics team would like to thanks the continuous support of new and regular customers.

We will endeavor to provide your with good quality production, favorable prices and excellent services in coming years.
Kingtronics Production lines will start around 3-weeks-holiday from 20th January.

Different production lines will have different schedule.
The lead time may be extended because of CNY holiday.

If any demand recently, please feel free to share earlier.
Thank you !

With the changing economic landscape and evolving consumer behavior, industries will continue their path of digital transformation. This means that the demand for semiconductors will increase. This prompts chipmakers and governments worldwide to work hard in closing the gap.

TSMC, the world’s leading semiconductor foundry, has pledged to invest $100 million to increase capacity over the next three years. Samsung and SK Hynix have teamed up with the South Korean government and spent $451 billion for the same venture.

Members of the European Union have their plans as well. The UK government is yet to reveal what they are precisely, but the idea is to help the local chip sector grow its capacity in their supply chains.

Both private and public sectors are determined to end the chip shortage. However, many challenges (policy making, local and international covid restrictions, etc.) need to be addressed before things get going.

Industry experts were optimistic at first, expecting the chip supply to recover by the end of 2021. Historically, demand for semiconductors declines every fourth quarter of the year, which should give chipmakers a chance to catch up.

That is not the case so far. It appears that the decrease in demand is not big enough for foundries to make a significant dent in the current imbalance.

They were forced to revise their initial opinion, and they now fear that the chip shortage could last until next year, maybe even until 2023.

Kingtronics - When Will the Global Chip Shortage End ?

Contact us

Tel: (86) 769 8118 8110
Tel: (852) 8106 7033
Fax: (852) 8106 7099
Skype: kingtronics.sales


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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