Capacitor Symbols

Such type of capacitors uses electrolyte as one of its electrode, which is why they are polarized. They have positive and negative terminals, and the top of these symbols represent the positive terminals. A polarized capacitor must be connected to the circuit accordingly. Otherwise, it will blow up. The first two symbols are used in Europe (IEC “new”), while the next two symbols are in the US (IEEE “old”). The 5^th symbol for a capacitor is used in japan.

This symbol represents a variable capacitance whose capacitance can be varied during normal operation. The capacitance is varied by increasing or decreasing the effective area between the plates which affects the capacitance of the capacitor. They are used in LC tuning circuits.

It is also a variable capacitor whose capacitance is used to calibrate a circuit during manufacturing or troubleshooting a circuit. The capacitance of a such a capacitor is not normally changed by users during operation.

They are also known as nonpolar electrolytic capacitors. It is made of two electrolytic capacitors in such a design that they can be used in any polarity. They differ from generic ceramic nonpolar capacitors by having large capacitance.

This type of capacitor is designed for DC power supply in RF systems. It supply the pure DC signal & also filters any RF component from it.

The capacitance of such a capacitor depends on the applied voltage. Increasing or decreasing the supply voltages changes the size of the dielectric gap between the plates, which increases the capacitance.

These capacitors’ capacitance depends on their surrounding temperature. The temperature increase or decrease may increase or decrease the capacitance of the capacitor. They are used in temperature sensing applications.

It is a variable capacitor with two operating stators and one common rotor. Moving the rotor increases the capacitance in one section & simultaneously decreases it in the other section. However, the total capacitance remains the same.

As the name suggests, such type of variable capacitor has two sets of stators that are separated at 180°. A common shaft rotates the rotor that has the same vanes placed 180° apart. Such capacitors do not have the 90° limitation of a generic variable capacitor.

As the name suggests, such type of variable capacitor has two sets of stators that are separated at 180°. A common shaft rotates the rotor that has the same vanes placed 180° apart. Such capacitors do not have the 90° limitation of a generic variable capacitor.

It is the combination of two variable capacitors. The variable rotor of these both capacitors is controlled using a single shaft. Thus they provide variable capacitance in both capacitors by moving a single rotor.

Such type of variable capacitor has two separate stators opposite each other mounted on the body of the capacitor. The rotor, whose plates are also butterfly-shaped, rotates between these two stators. The capacitance in such a capacitor varies equally between either stator & rotor. They are used in symmetrically tuned circuits.

Tempatrimmer or also known as thermotrimmer is a small trimmer capacitor with a variable temperature coefficient. They are used in stabilizing the drifting VFos.