Mica and PTFE Capacitors
1. What are Mica Capacitors?
1) Dielectric Material: Natural mica is used as the insulating layer, which has high stability, low loss, and excellent temperature characteristics.
2) Performance Advantages:
Low-temperature coefficient, high capacitance stability, suitable for high-frequency circuits and high-precision measurement equipment.
Strong pressure resistance, and high dielectric strength, are suitable for high-voltage scenarios.
3) Typical Applications: Filtering and tuning in RF circuits, resonant circuits, medical equipment, and precision instruments.
2. What are PTFE Capacitors?
1) Dielectric Material: Polytetrafluoroethylene (PTFE) is used, which has high dielectric strength, chemical corrosion resistance, and wide temperature range adaptability.
2) Performance Advantages:
Wide operating temperature range (such as -55 °C to 200 °C), can withstand extreme environments.
Low equivalent series inductance (ESL), suitable for high-frequency and high-power scenarios.
3) Typical Applications: aerospace equipment, military electronic systems, industrial high-frequency power supplies, and communication base stations with high-reliability requirements.
3. Common Features between Mica Capacitors and PTFE Capacitors
Installation Flexibility: supports multiple installation methods such as surface mount (SMD), through-hole insertion, and mechanical fixation.
High Reliability: Both types of capacitors have a long life and low failure rate, suitable for long-term use in harsh environments.
Selection Recommendations Mica Capacitors: Prioritize scenarios with high requirements for temperature stability and high-frequency performance.
PTFE Capacitors: Suitable for high-power circuit design in high-temperature, high-pressure, or chemically corrosive environments.