Kingtronics Blog

Diode is a dual electrode electronic component with asymmetric conductivity. When conducting forward, there is an infinitesimal resistance between its two electrodes (anode and cathode), while in reverse, there is an infinitesimal resistance, meaning that current is only allowed to flow through the diode in a single direction.
In 1874, German physicist Karl Braun discovered the rectification ability of crystals. Therefore, the first generation diode developed in 1906, the "cat whisker diode," was made from mineral crystals such as galena. Early diodes also included vacuum tubes, which had two electrodes, an anode, and a thermal cathode. After the discovery of semiconductor performance, diodes became the world's first semiconductor device. Nowadays, most diodes are produced using silicon, and other semiconductor materials such as selenium or germanium are sometimes also used. The most common structure currently is a semiconductor performance junction chip connected to two electrical terminals through a PN junction.

Function
A diode has two terminals, anode and cathode, and current can only flow in a single direction. That is to say, current can flow from the anode to the cathode, but not from the cathode to the anode. The application of the unidirectional characteristic possessed by diodes is commonly referred to as the "rectification" function. In a vacuum tube, the voltage applied between the electrodes can allow hot electrons to travel from the cathode to the anode, thus having a rectifying effect. The conversion of alternating current to direct current, including the modulation of radio signals by radio receivers, is achieved through rectification.

Due to its characteristic of blocking forward and reverse flow, diodes can be thought of as electronic versions of check valves. However, in reality, diodes do not exhibit such perfect switching performance, but rather exhibit complex nonlinear electronic characteristics determined by specific types of diode technology. Generally speaking, the diode will only start working when the threshold voltage is reached in the forward direction (this state is called forward bias). The voltage drop at both ends of a forward biased diode is only slightly related to the current and is a function of temperature. Therefore, this feature can be used for temperature sensors or reference voltages.

The nonlinear current voltage characteristics of semiconductor diodes can be changed by selecting different semiconductor materials and doping different impurities to form impurity semiconductors. In addition to being used as a switch, diodes with changed characteristics also have many other functions, such as adjusting voltage (Zener diodes), limiting high voltage to protect circuits (avalanche diodes), radio tuning (varactor diodes), generating radio frequency oscillations (tunnel diodes, Gunn diodes, IMPATT diodes), and generating light (light-emitting diodes).

In semiconductor diodes, there are types that utilize the PN junction effect of P-type and N-type semiconductor interfaces, as well as the Schottky effect generated by metal semiconductor bonding to achieve rectification. If it is a PN junction diode, it is the anode on the P-type side and the cathode on the N-type side.

Kingtronics Hot product line【Diode Rectifier,Transistor】-1N4148W, BZX84C,ES2A, RS1A, SS12,SS22, US1A: https://www.youtube.com/watch?v=Si3wc4ZnXyE

Contact us today for best offer: info@kingtronics.com Skype: kingtronics.sales2
 

In 2023, we now have much more preferential support on price for active parts like M7, LL4148, BAV70, BAV99, BC848, and so on.
Welcome your inquiry to info@kingtronics.com for the best offer.

Kt Kingtronics Diodes and Rectifiers Best Offer All the Time
https://www.youtube.com/watch?v=Bp1th7sw4w4

Kingtronics managed to reduce production cost for SOT-23 package diodes and transistors recently.
Would you like to share inquiry to check our latest best support ? 

As we all known, material supplies for diodes, bridges and transistors were unstable. The prices kept increasing accordingly.

Here is a good news to share with all our new and regular customers. :-)

Nowadays, we reached an agreement with material suppliers to provide special better offer some values with below packages based on considerable quantities.

Please take this opportunity to share us your request to cost down !

We now have much better price support for below packages of Diode based on big qty.

Welcome share us inquiries of these!

SMA Packages ( #M7, #GS1M, GS2MA, S2M, GS2M, & #RS1M)
SMB Packages (#RS2A~RS2M, RS3A~RS3M, SMBJ series)
SMC Packages (#GS3A-GS3M, #ES3A-ES3J, #ES5A-ES5J, SMCJ series) 
DO-41 Packages( #1N4001-#1N4007, P4KE,SF11-SF18, UF4001-UF4007)
DO-27 Packages (#1N5400-1N5408,  #6A05-6A10, HER301-HER308)

In 2021, we cannot support some of our standard values of diodes and transistors because of material shortage, especially SS, SK, MBR, SR series Schottky Barrier Rectifier and transistors.
Meanwhile, there was long lead time for other diodes & transistors.

It was a bit inconvenience for all of us.
Nowadays, the supplies for some material resume normal gradually recently.
We can support some previous invalid values now.
Which is delighted that the lead time for rectifiers is improved now.

Welcome to share us your demand !
https://www.kingtronics.com/diodes-rectifiers/
Diodes and Rectifiers

Following we have some timely stocks and can be shipped immediately once the order is confirmed, please check our best offers, 

welcome your request.

Product datasheet: 

MKT--Radial multilayer ceramic capacitor  
https://www.kingtronics.com/pdf/radial-mlcc-capacitors.pdf
CKT--Chip tantalum capacitor  https://www.kingtronics.com/pdf/chip-tantalum-capacitors.pdf
TKT--Dipped tantalum capacitor https://www.kingtronics.com/pdf/dipped-tantalum-capacitors.pdf
LKT--Multilayer chip ceramic capacitor  https://www.kingtronics.com/pdf/smd-mlcc-capacitors.pdf

What is a diode? A diode is a semiconductor device that essentially acts as a one-way switch for current. An ideal diode will have zero resistance in one direction, and infinite resistance in the reverse direction. They are also known as rectifiers because they change alternating current (AC) into pulsating direct current (DC).

Common package diodes in daily life, such as SOD123, SOD323, SOD523, SOT23, ZMM series LL34 package, ZM47**A series LL41 package, BZX55C series DO35 package and so on.

We will offer you a nice price whether it is a plastic package diode or a glass packaged diode. Let us know by info@kingtronics.com, if you are interested.

below 6 application of Kingtronics' Diode & Bridge Rectifier, they can be used in its manufacturing.
Welcome send your inquiry to us, let us check and quote best to you! 
Monthly output: 90kkpcs per value

1》Lighting :
M7, 1N5819, 1N4007, DB3, 1N4007S, FR107, BA159, ABS10, MBL10S, ES1J, G1M, GS1M, DB107S, DB157S, DB207S

2》Power Management:
KBU410, KBU610, KBU810, KBU1010, KBU1510, KBU2510, D2UB100, D3UB100, GBU410, GBU610, GBU810, GBU1510, GBU2510, KBJ410, GBJ610, KBPC2510

3》Consumer Electronic Products:
SR560, HER207, 1N5406, GBJ1010, KBJ410, FR307, GBJ1510, HER107, FR207, SR5100, FR107, KBJ610

4》Computer :
KBP210, KBP310, D2UB100, D3UB100, D4UB100, GBU410GBU610

5》Commercial Unit:
MB10S, SS12, SS14, SS16, LL4148, P6KE400A/P6KE400CA, M7, SMBJ400A/SMBJ400CA

6》Industrial Communication Device:
GBJ210, KBJ410, GBJ1010, GBJ2010, GBJ2510