Key Specifications
- Capacitance:
- 3.3µF (microfarads): This value can also be represented as 3300nF (nanofarads) or 3,300,000pF (picofarads).
- Voltage Rating:
- 400V: This indicates the maximum voltage the capacitor can handle, either DC or peak AC, without risk of failure.
- Type:
- Polyester Capacitor: Polyester film capacitors utilize a polyester film as the dielectric. They are known for their good stability, reliability, and cost-effectiveness.
- Marking:
- 335:
- The first two digits (33) are the significant figures.
- The third digit (5) indicates the number of zeros to add, resulting in: (33 \times 10^5) pF, or 3.3µF.
- J: Widely denotes the tolerance of the capacitor, typically around ±5%.
- 335:
Features
- High Voltage: A voltage rating of 400V allows this capacitor to be used in high-voltage applications safely.
- Non-Polarized: Polyester capacitors are non-polarized, which means they can be installed in either direction without concern for polarity.
- Stability and Durability: They generally provide good electrical performance and can withstand various environmental factors.
Applications
Polyester capacitors with a rating of 3.3µF and 400V can be used in a range of applications, including:
- Filtering: Ideal for filtering applications in power supply circuits to reduce ripples and noise.
- Coupling or Decoupling: Can be used to couple and decouple stages in amplifiers and other circuits, allowing AC signals to pass while blocking DC.
- Timing Circuits: Often employed in timing circuits where precise timing intervals are crucial.
- Snubber Circuits: Used in snubber designs to protect components against voltage spikes caused by inductive loads.
- AC and DC Applications: Suitable for both alternating current (AC) and direct current (DC) circuits, depending on design.
Considerations When Selecting
- Voltage Rating: Confirm that the 400V rating is suitable for your application’s voltage conditions to avoid breakdown.
- Capacitance Value: Ensure that the 3.3µF value meets the specific requirements for the circuit design.
- Tolerance: The tolerance of ±5% is standard for polyester capacitors, but check if tighter tolerances are needed.
- Temperature Range: Verify that the operating temperature range of the capacitor fits your application requirements.
- Physical Size: Ensure the physical dimensions are appropriate for your PCB layout.
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