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
Trimming potentiometers play a crucial role in fine-tuning analog circuits, ensuring long-term stability and performance. Kingtronics® RKT series includes seven models (RKT-WA to RKT-WG) tailored for diverse calibration needs.
Precise Calibration in a Compact Footprint
- High adjustment accuracy for fine resistance tuning
- Stable electrical performance across temperature and time
- Robust construction for enhanced durability
- Multiple configurations to suit various PCB layouts
With resistance values from 100Ω to 2MΩ and power ratings up to 0.5W, RKT potentiometers are ideal for voltage dividers, amplifiers, oscillators, and sensor tuning.
Meet the 7 RKT Models
| Model | Adjustment | Style | Key Feature |
| RKT-WA | Top adjust | Round | Vertical board compatibility |
| RKT-WB | Side adjust | Round | Suited for horizontal layouts |
| RKT-WC | Top adjust | Square | Space-saving design |
| RKT-WD | Top adjust | Square | Reinforced mechanical stability |
| RKT-WE | Side adjust | Square | Precision side-entry tuning |
| RKT-WF | Top adjust | Square sealed | Dust-resistant for harsh environments |
| RKT-WG | Side adjust | Square sealed | Moisture-proof and rugged |
Need layout flexibility? Top or side adjust, round or square – there's an RKT option for every application.
Common Applications
- Manual analog circuit calibration
- Voltage reference adjustments
- Sensor signal tuning
- Amplifier gain setting
- Industrial control systems
- Telecommunication equipment
- Consumer electronic devices
Why Engineers Prefer RKT
- Reliable contact design to avoid signal dropouts
- RoHS compliance and international standard adherence
- Competitive cost with consistent availability
- Custom resistance values available upon request
