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Commercial Values Table – Polyester Capacitors

Polyester capacitors are passive electronic components used to store and release electrical energy. They are widely recognized for their reliability, durability, and cost-effectiveness. Below is a detailed overview of their structure, key features, applications, advantages, and commercial values.

Structure and Operation

  • Dielectric Material: Polyester capacitors use a polyester film layer as the dielectric, sandwiched between two conductive layers, typically aluminum.
  • Form Factor: Commonly available in radial or axial formats, they are easy to mount on printed circuit boards (PCBs).

Key Features

  1. Capacitance: Available in a wide range, from a few picofarads (pF) to hundreds of nanofarads (nF) or even microfarads (µF).
  2. Tolerance: Typically ±5% to ±10%, providing sufficient precision for general-purpose applications.
  3. Rated Voltage: Operates at voltages ranging from 50V to 250V, with higher-voltage versions also available.
  4. Operating Temperature: Functions within a temperature range of -55°C to +125°C, suitable for diverse environmental conditions.
  5. Stability: Offers excellent thermal stability and resistance to humidity, maintaining electrical properties over time.

Typical Applications

  • Decoupling Circuits: Stabilizes voltage and reduces unwanted noise in circuits.
  • Signal Filtering: Used in high-frequency filters due to their stability and low inductance.
  • Oscillators: Ideal for oscillator circuits, maintaining a consistent capacitance.
  • High-Frequency Circuits: Performs well in high-frequency applications due to low Equivalent Series Resistance (ESR) and minimal dielectric loss.

Advantages

  • Cost-Effective: Economical and widely available.
  • Reliable: Long lifespan and dependable performance under varying conditions.
  • Versatile: Suitable for a wide range of electronic applications.

Disadvantages

  • High-Frequency Performance: While suitable for most high-frequency uses, they may not outperform ceramic or polypropylene capacitors in extreme frequencies.

Commercial Value Table

The table below presents common commercial values for polyester capacitors, including capacitance, equivalent codes, tolerances, rated voltage, operating temperature, and typical applications.

Nominal Value (nF)Nominal Value (µF)Nominal Value (pF)Equivalent CodeToleranceNominal Voltage (V)Operating TemperatureTypical Applications
1 nF0.001 µF1000 pF1KpF, 102±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits, filtering
1.2 nF0.0012 µF1200 pF1K2, 122, 1n2K±5%, ±10%50V, 100V, 250V-55°C to +125°COscillators, resonant circuits
1.5 nF0.0015 µF1500 pF1K5, 152±5%, ±10%50V, 100V, 250V-55°C to +125°CHigh-frequency filtering
1.8 nF0.0018 µF1800 pF1K8, 182±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
2.2 nF0.0022 µF2200 pF2K2, 222±5%, ±10%50V, 100V, 250V-55°C to +125°CSignal filtering
2.7 nF0.0027 µF2700 pF2K7, 272±5%, ±10%50V, 100V, 250V-55°C to +125°COscillators
3.3 nF0.0033 µF3300 pF3K3, 332±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
3.9 nF0.0039 µF3900 pF3K9, 392±5%, ±10%50V, 100V, 250V-55°C to +125°CHigh-frequency filtering
4.7 nF0.0047 µF4700 pF4K7, 472±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
5.6 nF0.0056 µF5600 pF5K6, 562±5%, ±10%50V, 100V, 250V-55°C to +125°CSignal filtering
6.2 nF0.0062 µF6200 pF6K2, 622±5%, ±10%50V, 100V, 250V-55°C to +125°COscillators
6.8 nF0.0068 µF6800 pF6K8, 682±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
7.2 nF0.0072 µF7200 pF7K2, 722±5%, ±10%50V, 100V, 250V-55°C to +125°CHigh-frequency filtering
8.2 nF0.0082 µF8200 pF8K2, 822±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
10 nF0.01 µF10000 pF10K, 10KpF, 103±5%, ±10%50V, 100V, 250V-55°C to +125°CSignal filtering
15 nF0.015 µF15000 pF15K, 15KpF, 153±5%, ±10%50V, 100V, 250V-55°C to +125°COscillators
22 nF0.022 µF22000 pF22K, 22KpF, 223±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
27 nF0.027 µF27000 pF27K, 27KpF, 273±5%, ±10%50V, 100V, 250V-55°C to +125°CHigh-frequency filtering
33 nF0.033 µF33000 pF33K, 33KpF, 333±5%, ±10%50V, 100V, 250V-55°C to +125°COscillators
39 nF0.039 µF39000 pF39K, 39KpF, 393±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
47 nF0.047 µF47000 pF47K, 47KpF, 473±5%, ±10%50V, 100V, 250V-55°C to +125°CSignal filtering
56 nF0.056 µF56000 pF56K, 56KpF, 563±5%, ±10%50V, 100V, 250V-55°C to +125°COscillators
68 nF0.068 µF68000 pF68KpF, 683±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
82 nF0.082 µF82000 pF82K, 82KpF, 823±5%, ±10%50V, 100V, 250V-55°C to +125°CHigh-frequency filtering
100 nF0.1 µF100000 pF100K, 100KpF, 104±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
220 nF0.22 µF220000 pF220K, 220KpF, 224±5%, ±10%50V, 100V, 250V-55°C to +125°CSignal filtering
270 nF0.27 µF270000 pF270K, 270KpF, 274±5%, ±10%50V, 100V, 250V-55°C to +125°COscillators
330 nF0.33 µF330000 pF330K, 330KpF, 334±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
390 nF0.39 µF390000 pF390K, 390KpF, 394±5%, ±10%50V, 100V, 250V-55°C to +125°CHigh-frequency filtering
470 nF0.47 µF470000 pF470K, 470KpF, 474±5%, ±10%50V, 100V, 250V-55°C to +125°CDecoupling circuits
560 nF0.56 µF560000 pF560K, 560KpF, 564±5%, ±10%50V, 100V, 250V-55°C to +125°CSignal filtering
680 nF0.68 µF680000 pF680K, 680KpF, 684±5%, ±10%50V, 100V, 250V-55°C to +125°COscillators

Additional Notes

  • Tolerance: Typically ranges from ±5% to ±10%.
  • Rated Voltage: Common ratings are 50V, 100V, and 250V, suitable for various applications.
  • Operating Temperature: -55°C to +125°C, enabling use in diverse environments.
  • Applications: Polyester capacitors are widely used in decoupling, signal filtering, oscillators, and high-frequency circuits due to their stability and low loss.

FAQ

1. What makes polyester capacitors suitable for general applications?
Polyester capacitors offer a balance of cost, reliability, and performance, making them ideal for general-purpose applications.

2. Can polyester capacitors be used in extreme temperature conditions?
Yes, they operate reliably within a wide temperature range of -55°C to +125°C.

3. Are polyester capacitors suitable for very high-frequency applications?
While they perform well at high frequencies, ceramic or polypropylene capacitors may be better for extreme high-frequency needs.

4. How do I choose the right tolerance for my circuit?
Choose a tighter tolerance (e.g., ±5%) for precision circuits and a wider tolerance (e.g., ±10%) for general-purpose applications.

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