As ISO 9001: 2008 manufacturer, Kingtronics produce Trimming Potentiometer since 1990.

We mainly focus on these part number: 3296 3006 3386 3266 3362 3329 3590S

Most of above are through-hole, please help me sell C3305, this is 3mm SMD trimmer.

Cross to:Bourns C3303 Alps: RH03ADC Citec: 3130 , Murata: PVZ3A Panasonic: EVM1SSW/X

A Zener diode is a special kind of diode which allows current to flow in the forward direction same as an ideal diode, but will also permit it to flow in the reverse direction when the voltage is above a certain value known as the breakdown voltage. A Zener diode exhibits almost the same properties, except the device is specially designed so as to have a greatly reduced breakdown voltage.

The Zener diode's operation depends on the heavy doping of its p-n junction allowing electrons to tunnel from the valence band of the p-type material to the conduction band of the n-type material.

All such diodes, regardless of breakdown voltage, are usually marketed under the umbrella term of "Zener diode".

Kingtronics have much better prices offer for below zener diode, especially BZX55C and BZV55C.

1/2W  BZV55C 2V7 - BZV55 C47    LL-34  Tape & Reel
1/2W  BZX55C 2V7 - 8V2    DO-35 Bulk or Ammo
1W   1N4729A - 1N4756A   DO-41 Bulk or Ammo
1/2W  ZMM2V4 - ZMM47    LL-34  Tape & Reel
1W   ZM4729A - ZM4756A   LL-34Tape & Reel

Please check our website, you can download all PDF datasheet...

Zener diodes are used to maintain a fixed voltage. They are designed to 'breakdown' in a reliable and non-destructive way so that they can be used in reverse

to maintain a fixed voltage across their terminals. The diagram shows how they are connected, with a resistor in series to limit the current.

Zener diodes can be distinguished from ordinary diodes by their code and breakdown voltage which are printed on them. Zener diode codes begin BZX... or BZY...

Their breakdown voltage is printed with V in place of a decimal point, so 4V7 means 4.7V for example.
Zener diodes are rated by their breakdown voltage and maximum power:

  • The minimum voltage available is 2.4V.
  • Power ratings of 400mW and 1.3W are common.

Kingtronics high-energy tantalum capacitor is fully-sealed with polar radial leads and represents a new level of technology.
It's characterized by excellent electrical performance, high reliability, long usage life and high energy density in unit volume.

Application Construction:

NPO: Temperature compensation type, have little or no change in
capacitance with variation in temperature. Hence, they are used in
radio-frequency oscillators, precision timing circuits, ultra stable
amplifiers, etc.
X7R: Temperature stable type for by-pass and decoupling in radio
and television receivers, computers servo systems. Audio tone, and
coupling, etc., where moderate capacitance variations are permissible
and dissipation factor is not critical.
Z5U/Y5V: General type for by-pass and filtering applications.

Type: b, C1, , C2(inside kinked), C3...
standard LL:10mm+/-1mm. Max LL:25mm

As you know, general diode rectifier M7, 1N4007 and switching diode LL4148 are very common and popular in the market. This year, we win really good diode orders.

To support customers better, Kingtronics prepare stocks on offer. So the price and lead time are very attractive.

Pls note all the parts are NEW and Original. First come, first served. We will replenish stock once use out. Do you have any order plan now?

Stock status:

Axial Diode 1N4007 DO-41 T&R RoHS. 1,500,000pcs in stock (US$ 0.0057/pc)

SMD Diode M7 DO-214AC T&R RoHS. 550, 000pcs in stock

Switching Diode LL4148 LL-34 T&R RoHS. 2,000,000pcs in stock

Pls visit our website for details.

In 1938, German scientist Walter Schottky developed a diode having a metal to semiconductor junction.

A Schottky diode, like other solid-state diodes, conducts electrical current in one direction.

It can operate at higher speeds than typical silicon diodes.


Small pockets of electric charge build up in a typical silicon diode, slowing down its ability to turn current off.

A Schottky diode can operate hundreds of times faster since it avoids build up of electric charges.

It also has less than half the voltage drop conducting in the forward direction than a silicon diode.


Engineers use Schottky diodes in very high-frequency circuits, such as microwave transmitters.

Schottky diodes also see use in switching power supplies and solar battery charging systems.

Kingtronics produce and sell schottky diode 1N5817-1N5819, 1N5820-1N5822. if you have inquiry, pls send email to

Silicon diodes act as one-way valves for electrical current, allowing it to flow in only one direction. Like any electronic component,

diodes can fail from excessive voltage or current. Fortunately, diodes are simple to test, needing only a good multimeter to check them.

If you set the multimeter to read resistance and put the probes across the diode, you should read a low resistance one way and high resistance

with the probes reversed. A shorted diode will read low resistance both ways, and a blown diode will read high resistance both ways.


1.Turn off the power to your circuit or equipment. Let the equipment sit for at least 30 minutes before removing the case or cover to allow the power supply to discharge。

2.Locate the diodes you want to test. They are typically small, two-lead parts with a stripe on the body to indicate the diode's cathode side.

3.Turn the multimeter on and turn the function knob so it points to the resistance setting. Hold the plastic body of the probes and are not touching the metal tips.

Touch the tip of the positive probe to one side of the diode and the negative probe to the other side. Read the resistance measurement and write it down.

Reverse the probes so they're touching the opposite sides of the diode. Write down the resistance you read . The higher resistance should be at least 10

times greater than the lower one. If it's less than five, the diode is very likely bad.

Kingtronics produce many types of diode rectifier,such as silicon diode, switching diodes, fast recovery diodes zener diodes.... Pls visit our updated website for the details.

Any inquiry, pls send to . Many thanks!

A tantalum capacitor is a type of capacitor with parts made out of the metal tantalum. Because they offer several advantages over older and more standard aluminum capacitors, tantalum capacitors are becoming increasingly popular and are often included in newer circuit designs.

IdentificationA capacitor is an electronic component made out of two conductive plates separated by an insulating material. It is used to store energy.


Tantalum is a rare, hard, heavy, blue-grey metal. It is highly resistant to corrosion and is mostly chemical inert, making it a durable

metal for electronic components. Tantalum capacitors are made from a small amount of mostly pure tantalum powder.


Tantalum capacitors are used in situations where the capacitor must hold power for a longer period of time.

They are also used with power supplies and in environments that operate at high temperature.


Because of the way tantalum capacitors are constructed and the natural resistance to corrosion of tantalum,

tantalum capacitors are exceptionally durable. They do not have any parts that wear out with use.


One disadvantage to tantalum capacitors is that they are polar devices. They can only operate with power

flowing through them in one direction, unlike some other types of capacitors.

If you have inquiry about tantalum capacitor, pls send inquiry to

Moreovedr, our website is updated. Pls visit our new website for our ISO 9001: 2008 certification, UL certification, SGS certification.

Finding a Bridge Rectifier? How to find the best Bridge Rectifier? Do nothing before you visit our site! We kingtronics is Specialty in design,manufacture of bridge rectifier! We are your best choice.

The bridge rectifier is the most commonly used full wave rectifier circuit for several reasons, one advantage of a bridge rectifier over a conventional full-wave rectifier is that with a given transformer the bridge rectifier produces a voltage output that is nearly twice that of the conventional full-wave circuit.

(1) It does not require the use of center-tapped transformer, and therefore can be coupled directly to the ac power line, if desired.
(2)Using a transformer with the same secondary voltage produces a peak output voltage that is nearly double the voltage of the full wave center-tapped rectifier. This results in the higher dc voltage from the supply.

Kingtronics have UL certification for bridge rectifier, pls see picture of our products, we are glad to get your inquiries!

We kingtronics always sell very good quality capacitors based on our own brand.

Now kingtronics updated website! You can find new pictures of our products! Pls go to to view our all products.

Also we put our certifications below:

Kingtronics certifications

All certifications are available, if you need, pls visit our new web: Or you can send emails to

Welcome to your visit!

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

Meet Kingtronics in Moscow soon
Convention and Exhibition Centre,HongKong
Date: 13-16 October, 2019
Booth No.: 5G-C26

Meet Kingtronics in Munich soon
New Munich Trade Fair Centre, Germany
Date: 10-13 November, 2020
Booth No.: To be advised



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