A coupling capacitor is an electronic component that blocks DC voltage while allowing AC signals to pass between circuits in voltage amplification stages.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Tolerance | ±1% to ±20% | |
| Voltage Rating | 16V to 1000V DC | |
| Leakage Current | <0.01CV μA or 0.5μA (whichever greater) | |
| Capacitance Range | 1pF to 100μF | |
| Dielectric Absorption | <0.1% to 1% | |
| Temperature Coefficient | -55°C to +125°C | |
| Equivalent Series Resistance (ESR) | 10mΩ to 100Ω |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
A practical evidence checklist for RFQ preparation and supplier evaluation.
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Capacitor failure typically causes loss of signal transmission, resulting in no output or distorted audio. Common failure modes include open circuit (no signal passes), short circuit (DC leakage affects bias), or value drift (frequency response changes).
Select capacitance based on the lowest frequency to be coupled. Use formula C = 1/(2πfR) where f is cutoff frequency and R is input impedance. Typical values range from 0.1μF to 10μF for audio applications. Consider voltage rating, tolerance, and temperature stability.
Yes, capacitor characteristics influence audio performance. Dielectric absorption can cause signal memory effects, ESR affects high-frequency response, and nonlinearities in some dielectrics may introduce distortion. Film capacitors generally offer better audio performance than ceramic types.
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