Kingtronics International Company —Inspired by Innovation

Dear Designers and Engineers,

Introduction to Kingtronics Film Capacitors
At Kingtronics, we take pride in offering a wide range of film capacitors that meet the highest standards of quality and reliability. Our product line includes:

  • Metallized Polyester Film Capacitor
  • X2 Metallized Polypropylene Film Capacitor (310VAC)
  • Power Film Capacitor
  • DC-Link Capacitor
  • AC-Link Capacitor
  • Fixed Capacitor for Electromagnetic Interference Suppression and Connection to the Supply Mains

These capacitors are designed to serve various applications, providing optimal performance and longevity. Today, we introduce you to our FKT-MB Box Type Metallized Polyester Film Capacitor, a standout product in our film capacitor lineup.


FKT-MB Box Type Metallized Polyester Film Capacitor

  • High Reliability: Ensures stable performance over a long period.
  • Box Type Design: Provides an identical outer appearance, facilitating easy identification and integration into different applications.
  • Operating Temperature Range: -40℃ to +85℃, making it suitable for various environmental conditions.
  • Rated Voltage Options: 63V, 100V, 160V, 250V, 400V, 630V, catering to diverse requirements.
  • Capacitance Range: 0.0010µF to 2.2µF, offering flexibility for different applications.

The FKT-MB Box Type Metallized Polyester Film Capacitor is versatile and can be used in numerous applications, including but not limited to:

  • Lightning Event Counter
  • Power Module of Solar Inverter
  • Kitchen Appliances
  • Audio Parts
  • Thermostat
  • Charger
  • Modem
  • Emergency Lighting
  • Battery Buffer (Solar Power)
  • Garage Door Drives
  • Frequency Converter for Garage Door Drives
  • Bathroom Dryer
  • Water Heater
  • Washing Machine
  • Induction Cooker
  • Power Supply
  • Communication Equipment
  • Radio
  • General Applications

Why Choose Kingtronics?
Choosing Kingtronics means opting for high-quality, reliable components that are tested and certified. Our film capacitors come with certifications from VDE, UL, and ENEC, ensuring compliance with international standards.


Contact Us for the Best Offer
For inquiries and the best offers on our film capacitors, feel free to contact us:
📩 Email: /
💬 Skype: kingtronics.sales2 (Charlene)


Follow Us on Social Media
Stay updated with our latest products and news by following us on social media:

Watch Our Production Flow
Get an inside look at our production flow for film capacitors, approved by VDE, UL, and ENEC certification. Watch the video here.

Stay tuned for more updates and product insights!

Kingtronics – Inspired by Innovation, Your Trusted Partner in Electronic Components.

Kingtronics Film Capacitors: Reliable Solutions for Various Applications

 Kingtronics International Company —Inspired by Innovation

Dear Designers and Engineers,

We are thrilled to announce that Kingtronics has significantly extended the rated capacitance range for our Super Capacitors Radial Type DKT-DX Series, now spanning from 3F to an impressive 1400F. This extension is designed to meet the growing demand and diverse needs of our customers across various industries.

For detailed technical specifications, please refer to our Kingtronics DKT-DX data sheet.


  1. Smart Meters: Ideal for electricity, water, and gas meters.
  2. Car Electronics: Perfect for car audio systems, ETC systems, and driving recorders.
  3. IoT and 5G: Enhance smart TVs, refrigerators, electronic doors, anti-theft systems, and 5G terminals.
  4. Backup Power Supplies: Reliable for communication equipment, wireless transmission, RAM, UPS, small household appliances, energy storage devices, green energy solutions, and solar street lights.

Our Super Capacitors are engineered to deliver high capacitance and reliable performance, making them an excellent choice for a wide range of applications.

🔷Welcome to contact us!

Email: /
Skype: kingtronics.sales2 (Say Hi to Beryl)

Stay connected with us for more updates and innovations!

🔷Follow us on social media

Stay tuned for more updates and product insights!

Kingtronics – Inspired by Innovation, Your Trusted Partner in Electronic Components.

Latest News: Kingtronics Expands Super Capacitor Range!


 Kingtronics International Company —Inspired by Innovation

Dear Designers and Engineers,

Are you looking for high-quality capacitors designed for surface mounting on high-density circuit boards? Look no further than the GKT-VR Aluminum Electrolytic Capacitors from Kingtronics. These capacitors are an excellent choice for a variety of applications, offering reliability, efficiency, and durability.


• High-Density Mounting: Specifically designed for surface mounting on high-density circuit boards.

• Certified Quality: ISO/RoHS certified to meet international quality standards.

• Long Load Life: Offers a long load life ranging from 2000H to 3000H.

• Wide Operating Temperature Range: Operates efficiently in temperatures ranging from -55℃ to +105℃.

• Wide Capacitance Range: Available in a wide range of capacitance from 10uF to 2200uF.

• Voltage Range: Supports a voltage range from 6.3V to 50V.DC.

• Variety of Dimensions: Available in various dimensions from 45.4mm to 1010.5mm to suit different needs.


• Cost-Effective: Inexpensive capacitors with high capacitance values, perfect for filtering lower frequencies.
• High Energy Density: Higher energy density compared to film capacitors and ceramic capacitors.
• High Power Density: Higher power density compared to supercapacitors.
• No Peak Current Limitation: Operates without peak current limitations.
• Compact and Capacious: Small in size yet large in capacity and highly resistant


•  Automotive Power: Ideal for use in automotive power systems.
•  Industrial LED Lighting: Suitable for industrial LED lighting solutions.
•  Telecom Infrastructure: Perfect for telecom infrastructure applications.
•  PC Machine Power Supplies: Reliable for use in PC machine power supplies.

For more information, feel free to send your inquiries to:



Skype: kingtronics.sales2 (Claire)

Selling worldwide including

Germany, Poland, Slovenia, Czechia, Lithuania, France, Italy, Spain, Denmark, India, Turkey, Brazil,USA, UK, Canada

Explore the exceptional features and advantages of our GKT-VR Aluminum Electrolytic Capacitors and enhance your electronic projects with top-notch components from Kingtronics!

Stay tuned for more updates and product insights!

Kingtronics – Inspired by Innovation, Your Trusted Partner in Electronic Components.

🔗Facebook  /  Twitter  /  LinkedIn  /  Blog  /  Google Blog  /  YouTube

Kingtronics GKT-VR Aluminum Electrolytic Capacitors – SMD Type

As the afternoon progresses, an abundance of delicious food and enjoyable interactions create a sense of togetherness and belonging.We enjoy creating a workplace where employees flourish, both in their professional roles and personal connections.

Colleagues gathered together to enjoy sumptuous delicacies and refreshing drinks. With a wide selection of dishes and drinks, everyone will find something to their liking, fostering a sense of contentment and contentment in the group. Colleagues share stories and jokes, and laughter fills the air, creating an atmosphere of warmth and camaraderie. This gathering is not only a time to enjoy food and drinks, but also an opportunity for employees to build and strengthen relationships outside of their daily work environment.

As the afternoon progresses, an abundance of delicious food and enjoyable interactions create a sense of togetherness and belonging. We enjoy creating a workplace where employees flourish, both in their professional roles and personal connections.🌟

Gathering for happiness, building a bright future together!

 We are thrilled to extend a warm invitation to all attendees of Electronica 2024 to visit our booth, A5-131-4, in Munich, Germany.

As we gear up for this exciting event, we want to ensure that your experience with KT Kingtronics is both informative and rewarding.

Can't attend Electronica 2024? No problem! Stay updated on all the latest news, product releases, and industry insights from KT Kingtronics by following us on our social media channels and visiting our website regularly.


Electronica 2024 promises to be an unforgettable event, and we can't wait to share it with you.

Join us at booth A5-131-4 to discover the latest innovations from KT Kingtronics and to take advantage of our exclusive offerings. We look forward to meeting you in Munich!⭐

 Kt Kingtronics at Electronica 2024: Exploring Our Presence in Munich, Germany (Booth No. A5-131-4)

 Quartz Crystals and Oscillator are widely used in wireless and timing device, in response to customer demand, Kingtronics has expanded production line to produce the following Quartz Crystals and Oscillator,

Welcome check our new on-line catalog for more informaiton. 😊

** New ** Kingtronics-Quartz Crystals & Oscillators on –line Leaflet:

Welcome to contact us with your inquiry today!
Skype: kingtronics.sales2

Bluetooth wireless communicaation sets, HDD, DSN, PDA,GPS,Digital Tuner, Wireless LAN and mobile phones.
NoteBook, Networking, GPS/Navigation, BlusTooth, Ethernet, ADSL, VDSL, Fiber chaneel hand-held electronics products.

Tuning Fork Crystal:

Quartz Crystal:


And finally, for video demonstrations, tutorials, and insights into our products and their applications, be sure to visit our YouTube channel

Kingtronics new catalog for Quartz Crystals and Oscillator-- HC49SMD, 3225SMD, OSC5032, 3215SMD

   As a company committed to corporate social responsibility, Kingtronics International is always eager to hear the stories of those we support through our sponsorship programs. Recently, we received a heartfelt letter from one of the students we sponsor in the Guangxi Zhuang Autonomous Region in China, and his words truly resonated with us.

In his letter, a senior high student expressed his sincere gratitude for the financial support provided by Kingtronics International. He shared how, during the winter break, he was finally able to experience a sense of relaxation and relief from the pressures of his studies. Instead of spending his days solely focused on academic pursuits, he had the opportunity to spend quality time with his family, particularly his beloved grandmother.

Despite the sweltering heat of the midday sun, this young student found immense joy in simple activities like digging sweet potatoes with his grandmother and cooking home-cooked meals together. It was a chance to connect with his roots, embrace his cultural heritage, and strengthen the bonds of family love.

Reading his words, we were deeply moved by the profound impact that our sponsorship had on his life. Beyond just providing financial assistance, we had helped create moments of happiness, warmth, and togetherness that would be cherished for a lifetime. As we reflect on his story, we are inspired to redouble our efforts in our corporate social responsibility initiatives, fueled by the belief that together, we can create a brighter, more compassionate world for all.

The Kingtronics International Team

Kingtronics Angel Charity Social Activity in 2024 Spring

Welcome to send email to us at We believe your participation will make this activity be more better!


With more than 30 years experience as leading manufacturer, Kingtronics has been always committed ourselves to improve our technique and revolutionizing our products to satisfy the market’s rapid changing demand.

With development of the surface mount welding technology, Kingtronics has developed reflow soldering newly to replace traditional wave soldering to fit small size trimpot like RKT-3269 and RKT-3361.The reflow soldering is more environmental friendly due to the soldering material not including lead. Additionally, it has more accurate control in the soldering process to increase the quality of trimpot.

Here are the product features for RKT-3269 and RKT-3361.

Welcome to contact with us for our best support!
Skype: kingtronics.sales2

RKT-3269 SMD Square Trimming Potentiometer

*Multiturn / Cermet /Industrial
*Rotor designed for automatic machine adjust interface
*Vertical and horizontal adjust styles
*Compatible with surface mount manufacturing processes
*RoHS compliant

Data sheet:

RKT-3361 Single-Turn SMD Trimming Potentiometer

*Single-Turn / Cermet / Industrial
*Rotor designed for automatic machine adjust interface
*Compatible with surface mount manufacturing processes
*RoHS compliant

Data sheet: 

Kingtronics new technique “Reflow Soldering” for SMD Trimming Potentiometer (Trimpot)

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.

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:

Contact us today for best offer: Skype: kingtronics.sales2
 Kingtronics Introduction of Diodes

 Aluminum electrolytic and solid polymers, both have advantages and disadvantages when comparing to one another. Designers need to be aware of these differences when determining which capacitor type is best suited for use in their application.

The most notable difference between aluminum electrolytics and polymers is their electrolyte. Aluminum electrolytics have a liquid electrolyte while polymers have a solid electrolyte. These differences play a major role in the characteristics of each type of capacitor.

The solid polymer electrolyte gives the polymer capacitors advantageous characteristics over liquid aluminum electrolytic capacitors.

The advantages are as follows:
o Lower ESR at high frequency
o Lower D.F. / tan δ
o Higher ripple current ratings
o Stability over temperature
o Wider operating frequency range
o Long life

Following product list of Kingtronics Solid Polymer Electrolytic Capacitors for your reference.
We have very competitive price and fast lead time.
Welcome to contact us for your project inquiries. Let us do our utmost to provide the best offer to you.

Contact us today for best offer: Skype: kingtronics.sales2

Polymer Aluminum Solid Electrolytic Capacitors- Product List

Kingtronics P/N


Load Life







Standard Low ESR





Super Low ESR





High Ripple Current





High Temperature










Super low ESR










Long life





High voltage, long life





SMD type, miniaturized

 #Kingtronics #KT #competitiveprice #shortleadtime #consumerelectronics #electronicsolution #ecap #RoHS #ISO #PCB #assembly #EMS #IoT #5G #SMD #SMT #Lighting #TelecomInfrastructure #medicalequipment #Electronics #Innovation #Capacitors #Sustainability #HKcapacitor #capacitorsupplier #componentssupplier

Aluminum Electrolytic Capacitors: Solid Polymers and Aluminum Electrolytics

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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