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Film Capacitors

The 21FD37175A-F is a high-voltage and high-frequency film capacitor stacked in a single package. It is designed for high insulation applications such as power supplies, neural networks, and medical electronics. This capacitor offers superior electrical characteristics, excellent stability and reliability, and a credible cost-performance ratio, making it an ideal choice for many applications.

Features of 21FD37175A-F

• High voltage resistance: withstands up to 10KV for a short time with 8KV AC working voltage.
• High temperature capability: temperature range from -55 to +125C.
• High frequency operation: up to 30MHz.
• Easy for installation and replacement.
• Low ESR, ESL, and tolerance: ESR as low as 0.022 ohm, ESL as low as 0.4 ohm, and tolerance as tight as +/-1-3%.
• Excellent AC performance in both small and large signal.
• Superior endurance performance.
• High moisture resistance making it suitable for outdoor applications.
• Compact size.

Applications of 21FD37175A-F

21FD37175A-F film capacitors are widely used in a variety of applications, such as in power supplies, lighting, industrial, medical, and audio/visual devices. The high insulation capability makes the 21FD37175A-Ffilm capacitor well suited for high voltage, high temperature, and high humidity applications.

• Power Supplies
  • Power supply filtering
  • High voltage application
  • Repeat operation
• Lighting
  • LED lighting
  • Outdoor lighting
  • High frequency lighting
• Industrial
  • Industrial systems
  • Motor drive
  • Sensor systems
• Medical
  • Patient monitoring
  • Ultrasound machines
  • Cardiac defibrillators
  • Medical imaging equipment
• Audio/Visual Devices
  • High-end car audio systems
  • Projectors
  • DACs

Working Principle of 21FD37175A-F

The 21FD37175A-F is a film capacitor with a dielectric between two layers of metal electrodes. The capacitor is constructed with a stacked dielectric consisting of fluorinated polymers and glass film laminated together. The metal electrodes are evaporated on the surface of the dielectric by sputtering, leading to thin and evenly distributed electrodes, resulting in low equivalent series resistance (ESR).

The capacitor works by storing electric charge in the form of an electric field across its two electrodes. The amount of charge stored depends on the area and thickness of the electrodes and dielectric, as well as the voltage applied across the electrodes. When a voltage is applied across the capacitor, an electric field is created within the dielectric, which stores the electric charge. When the voltage is removed, the electric field collapses and the stored energy is dissipated.

Conclusion

The 21FD37175A-F film capacitor is a reliable and cost-effective choice for many high-insulation requirement applications. It has outstanding electrical characteristics, excellent stability and reliability, high temperature capability, high frequency operation, and superb endurance performance.

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