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275J 400V Cl21 capacitor widely used in coupling circuits

  • CL21 Polyester Film Capacitor
  • 275J 400V Film Capacitor
  • Package: Bulk and Tape
  • Operating temperature: -55°C to 105°C
  • Can withstand 200 times of destructive charge and discharge


275J 400V Cl21 capacitor widely used in coupling circuits

Matters needing attention when using 275J 400V Cl21 capacitor:

  1. Do not use in high-frequency circuits. Because CL21 is obviously less stable than CBB capacitors at high frequencies, this capacitor is not suitable for use in high-frequency circuits.

2. The capacity stability is relatively better than CBB22 capacitors. Although the CL21 capacitor can withstand higher temperatures, its capacitance stability is not as good as that of the CBB22 capacitor as temperature changes. This also requires special attention.

Characteristic of 275J 400V Film Capacitor

ltem Characteristics
Reference standard GB7332 (IEC 60384-2)
Climatic Category 40/85/21
Rated Voltage 400V
Capacitance 2700nf
Capacitance Tolerance ±5%(J)
Voltage proof 1.6UR (2S)
Dissipation Factor ≤0.01 (20°C, 1KHz)
Insulation Resistance



Size of CL21 275J 400V Film Capacitor

275J 400V Cl21 capacitor

CL21 275J 400V Film Capacitor
W: 32.0mm
H: 23.0mm
T: 13.0mm
P±1: 27.5mm


Q:Film capacitors have been wave soldered, lead-free soldered, about 200 degrees? High temperature can easily damage the capacitor or affect the life. Don’t know how this industry is controlled and handled? Is manual welding required? Is there a temperature limit in the capacitor specifications? Is the solder joint temperature or body temperature when labeling?

A:Hello, the temperature of the wave soldering peak of the film capacitor can be 275 ° C, which is also the temperature of the IEC standard, and the tin immersion time is 3S-5S. The other is the preheating temperature and time. Film capacitors can withstand this temperature. Does not affect electrical characteristics. The solderability temperature and soldering heat resistance temperature are stated in the specification approval book. The former is aimed at the solderability of capacitor pins, while the latter is about the influence of welding temperature on the characteristics of film capacitors.

Q: How to judge the quality of the film capacitor?

A: 1) Use a multimeter to test the resistance of the thin-film electricity. The two feet should be very high resistance. If there is a capacitance meter, measure whether the capacitance value matches the mark on the case.

2) Test performance at room temperature, including capacity, loss, insulation resistance, withstand voltage, ESR, etc.

3) Do simulated life test.

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