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
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
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
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
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