Kingtronics Blog

Kingtronics International Company — Inspired by Innovation

When it comes to high-demand electronic applications, not all potentiometers are created equal. Kingtronics' RKT series offers a variety of wirewound and adjustable potentiometers engineered specifically for heavy-duty, high-power environments. But what makes them ideal for industrial-grade use?

1. High Power Handling Across the Series

The RKT-WS and RKT-WT series can handle up to 5000W and beyond, using robust aluminum or ceramic enclosures for stable heat dissipation. Ideal applications include:

• Power supply units
• Motor control systems
• Load testing environments

From compact 50W models to massive 3000W configurations, RKT offers scalable solutions for demanding environments.

2. Precise Adjustment for Fine Control

For applications that require precision tuning, RKT-WJ (conductive plastic) and RKT-WP (digital knob) models deliver smooth adjustment curves, low noise, and high linearity. Key features:

• Electrical travel up to 345°
• Over 50 million rotational lifespan (RKT-WJ)
• 0–14 scale digital feedback (RKT-WP)

3. Flexible Mounting & Rugged Construction

RKT-WQ models include enclosed metal casings suitable for outdoor or vibration-prone environments, supporting up to 82KΩ and 2000V. The RKT-WH carbon film option is perfect for budget-conscious applications with reliable results.

All RKT potentiometers are:

• Easy to mount
• Available in multiple sizes
• Engineered for shock, vibration, and heat resistance

4. Wide Range, Unified Standards

The RKT series covers a spectrum from low-ohmic precision control to high-resistance voltage division:

Model	Type	Power Rating	Key Application
RKT-WS	Wirewound (Aluminum)	50W–5000W	Heat-sensitive systems
RKT-WT	Wirewound (Ceramic)	20W–3000W	Power adjustment, load control
RKT-WQ	Enclosed Resistor	5W–500W	Rugged environments
RKT-WJ	Conductive Plastic	2W	Precision control
RKT-WP	Digital Knob	–	Manual adjustment interfaces
RKT-WH	Carbon Film	2W	General-purpose adjustment

Summary: When Stability Meets Versatility

If your circuit design demands high power tolerance, precise adjustment, and long-term reliability, the Kingtronics RKT series delivers a flexible, modular solution for both industrial and commercial systems.

Discover Robust Solutions

🔍 Click here to view specifications and download the full datasheet

Visit our homepage: www.kingtronics.com

Contact us: info@kingtronics.com

  Kingtronics International Company — Inspired by Innovation 

  Kingtronics International Company — Inspired by Innovation 

  Kingtronics International Company — Inspired by Innovation 

In today’s fast-paced electronics market, engineers and sourcing teams need more than just parts—they need reliable electronic components from a supplier they can count on. Kingtronics® has earned that trust worldwide, providing consistent quality, fast response, and global service for decades.

Built for Reliability. Trusted by Professionals.

As a dedicated capacitor supplier, Kingtronics offers a wide range of components including capacitors, diodes, and trimming potentiometers. All products are manufactured under ISO-certified standards to meet the high demands of industrial and commercial applications.

• ISO-certified production with strict quality control
• Long operating life and stable performance under stress
• Fast lead time and international logistics capability

Global Reach. Local Support.

From North America to Europe and Asia, Kingtronics offers responsive multilingual support. Our dedicated service team ensures that procurement managers and engineers always have the technical backing they need. With Kingtronics, you're not just buying parts—you’re building lasting reliability into your design.

Why Global Clients Trust Kingtronics

• Over 30 years of manufacturing expertise in passive components
• Stable supply chain with competitive global pricing
• Trusted by OEMs and EMS companies worldwide
• Strong presence in trade shows and B2B sourcing platforms

Whether you are designing for consumer electronics, industrial control, or automotive systems, Kingtronics ensures that your components deliver performance you can count on.

Learn More

• Visit our homepage: www.kingtronics.com
• Contact us: info@kingtronics.com

  Kingtronics International Company — Inspired by Innovation 

When building reliable and high-performance power circuits, selecting the right film capacitor is a critical decision. Kingtronics® FKT series capacitors—FKT-AA, FKT-AB, and FKT-AC—are engineered to provide excellent electrical performance, stability, and long-term reliability. Each variant addresses specific technical needs, making the FKT series a comprehensive solution for engineers.

Precision Engineered for Demanding Power Applications

• Flame-retardant encapsulation (plastic and epoxy resin)
• High reliability and long lifespan
• Self-healing property
• RoHS compliant

FKT-AA: Balanced Performance for Standard Designs

• Dielectric: Metallized polyester film
• Operating temperature: –40°C to +105°C
• Capacitance range: 0.033μF to 68μF
• Rated voltage: 100VDC, 250VDC, 400VDC, 630VDC
• Dissipation factor:
  • C < 1μF: ≤ 0.013 @ 10kHz
  • 1μF < C ≤ 10μF: ≤ 0.008 @ 1kHz
  • C > 10μF: ≤ 0.010 @ 1kHz

Use case: General-purpose AC/DC circuits, household appliances, and audio circuits
Advantage: Broad voltage and capacitance support for universal applications

Download FKT-AA Datasheet (PDF)

FKT-AB: Compact and Space-Efficient Design

• Dielectric: Metallized polyester film
• Shape: Flat oval axial construction
• Operating temperature: –40°C to +105°C
• Capacitance range: 0.01μF to 68μF
• Rated voltage: 100VDC, 250VDC, 400VDC, 630VDC
• Dissipation factor:
  • C ≤ 1μF: ≤ 0.013 @ 10kHz
  • 1μF < C ≤ 10μF: ≤ 0.008 @ 1kHz
  • C > 10μF: ≤ 0.010 @ 1kHz

Use case: Equipment requiring compact layout, such as audio systems and dense PCB designs
Advantage: High reliability in a space-saving format

Download FKT-AB Datasheet (PDF)

FKT-AC: High Voltage and Ultra-Low Loss

• Dielectric: Metallized polypropylene film
• Operating temperature: –55°C to +100°C
• Capacitance range: 0.047μF to 56μF
• Rated voltage: 250VDC, 400VDC, 630VDC, 1000VDC, 1250VDC
• Dissipation factor:
  • C < 0.1μF: ≤ 0.0015 @ 10kHz
  • 0.1μF < C ≤ 1μF: ≤ 0.0020 @ 10kHz
  • 1μF < C ≤ 4.7μF: ≤ 0.0030 @ 10kHz
  • C > 4.7μF: ≤ 0.0015 @ 1kHz

Use case: High-frequency or high-voltage applications such as industrial power modules, inverter circuits, and power supplies
Advantage: Exceptional low loss performance and voltage endurance

Download FKT-AC Datasheet (PDF)

FKT Film Capacitor Series Specification Summary

FKT-AA

• Dielectric: Polyester film
• Capacitance Range: 0.033μF – 68μF
• Voltage Range (DC): 100V – 630V
• Dissipation Factor (Typical): ≤ 0.008 – 0.013
• Best Fit Applications: General AC/DC circuits, appliances, audio systems
• Key Benefit: Versatile choice for standard designs with broad voltage and capacitance support

FKT-AB

• Dielectric: Polyester film (compact design)
• Capacitance Range: 0.01μF – 68μF
• Voltage Range (DC): 100V – 630V
• Dissipation Factor (Typical): ≤ 0.008 – 0.013
• Best Fit Applications: Space-limited circuits, compact PCB layouts, audio circuits
• Key Benefit: Space-efficient form factor with stable electrical performance

FKT-AC

• Dielectric: Polypropylene film
• Capacitance Range: 0.047μF – 56μF
• Voltage Range (DC): 250V – 1250V
• Dissipation Factor (Typical): ≤ 0.0015 – 0.0030
• Best Fit Applications: High-frequency and high-voltage applications (inverters, power modules, etc.)
• Key Benefit: Ultra-low loss and high voltage endurance for precision power circuits

      Kingtronics International Company — Inspired by Innovation 

In fast-paced industries like electronics manufacturing and sourcing, speed matters. Whether you're dealing with urgent procurement deadlines or need quick clarification on product specs, waiting days for email responses is not ideal.

To better support our global clients, Kingtronics now offers real-time assistance via WhatsApp.

What you can do on WhatsApp

• Quotations on capacitors, resistors, bridge rectifiers, trimmers, and more
• Sample requests and delivery information
• Stock availability and lead times
• Technical comparisons or model selection support
• Datasheets, RoHS/REACH declarations, test reports

Our team responds quickly during business hours and can follow up with detailed documents as needed.

Why WhatsApp

• Fast, direct communication with our sales and support team
• Convenient platform many clients already use
• Efficient exchange of product codes, specs, photos, and files
• Better collaboration between purchasing, R&D, and vendors

WhatsApp is not just for casual chat. For many of our partners, it’s become the most efficient channel for technical and commercial support.

How to reach us

You can contact Kingtronics on WhatsApp in two ways:

• Scan the QR code below
• Click the button to start chatting directly

Start the conversation

If you're looking for a faster way to request information, compare models, or confirm availability, WhatsApp offers the convenience and immediacy today's sourcing requires.

Contact Kingtronics via WhatsApp today and experience a more efficient way to work with us.

      Kingtronics International Company — Inspired by Innovation 

              Kingtronics International Company — Inspired by Innovation 

For engineers working on space-constrained PCB layouts, selecting a tact switch is rarely about just one factor. Between mounting footprint, actuation feel, and electrical specs, finding a switch that fits without adding complexity can be a challenge.

That’s where the Kingtronics SMD Tact Switch series offers a practical solution: three compact surface-mount switches, one unified spec — so you can design smarter without sacrificing consistency.

One Standard Actuation Force – 1.6 ± 0.5N

All three models in the Kingtronics series feature a consistent 1.6N actuation force, giving your design a uniform tactile experience across your product lineup.

Unified Electrical Specs Across All Models

• Rating: 50mA / 12V DC
• Withstand Voltage: 250V AC
• Insulation Resistance: ≥100MΩ
• Contact Resistance: ≤50mΩ

Multiple Footprints – Layout Flexibility Without Re-Evaluation

Designed for SMT – Ready for Automation

All models in this series are built for surface-mount (SMD) reflow processes, making them ideal for modern, automated assembly lines.

Final Thought – One Spec, Less Work

If you're tired of juggling different specs for every footprint, it’s time to simplify.
One force. One spec. Three smart options.

Explore More

Learn more from our product specs:

Kingtronics SMD Tact Switch Series – Unified Specs, Flexible Fit

Visit our website for more details:

www.kingtronics.com

Contact us directly:
info@kingtronics.com

              Kingtronics International Company — Inspired by Innovation 

Kingtronics is now on Microsoft Teams — because getting answers shouldn’t take days.

If you've ever waited two days for a simple reply — “Is this part in stock?” or “Can I get a quick quote?” — you know the cost:

• 💡 Design delays
• 💡 Sourcing headaches
• 💡 Decision fatigue

We’re cutting the delay.
Now you can message us directly on Teams — no tickets, no forms, no guessing who to contact.
Just real-time answers, from real people, exactly when you need them.

What can you do via Teams?

• Ask about stock, pricing, or lead times
• Share drawings, BOMs, or test specs
• Get matched to the right person — instantly
• Skip the email loop and get straight to the point

It’s not just faster — it’s built around how modern global teams actually make decisions.

We’re not replacing email — but if you prefer talking to people instead of threads, this is for you.

📩 Contact us at info@kingtronics.com
🌐 Visit our website: www.kingtronics.com

One message. One connection. Faster answers.

              Kingtronics International Company — Inspired by Innovation 

Explore key design factors and discover reliable options for long-term performance.

When stability matters, plastic film capacitors remain one of the most trusted passive components for engineers. From power supplies and automation systems to lighting controls and industrial inverters, their low loss and consistent performance make them indispensable in modern circuit design.

But how do you choose the right one—especially when reliability and layout flexibility are critical?

1. Low Dissipation = High Efficiency

In high-performance applications, energy loss can’t be ignored. A low dissipation factor (DF) prevents overheating and extends capacitor life.
✅ Kingtronics FKT-MM offers an ultra-low DF of 0.1%, helping maintain circuit stability even under prolonged operation.

2. Choose the Right Structure for Your Layout

Whether you're designing a compact power module or an industrial control board, capacitor form factors matter.
The FKT series offers multiple structures — Mini Box, Stacked, and Box Type — with various pitch and lead options to simplify PCB layout without compromise.

3. Built for Reliability Under Real Conditions

More than just capacitance and voltage, the internal construction and film quality determine how a capacitor performs over time.
The Kingtronics FKT-MS / MT / MM series is known for consistent thermal stability and endurance under switching stress, ensuring long-term reliability in demanding environments.

4. Global-Ready & RoHS Compliant

For projects that cross borders or industries, compliance matters.
The entire FKT series is RoHS-compliant, and widely used in industrial electronics, energy systems, and control modules.

💡 Looking for Reliable Plastic Film Capacitors?

Whether you're upgrading an industrial system or building from scratch, the Kingtronics FKT Series gives you the performance, flexibility, and reliability you need — without compromise.

🔍 Learn more from our product specs:
www.kingtronics.com/Film-Capacitors/index.html

🌐 Visit our website for more details:
www.kingtronics.com

✉️ Contact us directly:
info@kingtronics.com