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## FAQ

• ### Q What is inductance and what does it do?

A
Inductor (Inductor) is a component that can convert electrical energy into magnetic energy and store it. The structure of the inductor is similar to a transformer, but there is only one winding. When the inductor is in a state where there is no current flowing through it, it will try to prevent the current from flowing through it when it is turned on; in the state where there is current passing through, it will try to keep the current unchanged when the circuit is turned off.

Inductors mainly play the role of filtering, oscillation, delay and notch in the circuit, as well as screening signals, filtering noise, stabilizing current and suppressing electromagnetic wave interference. The most common role of inductance in the circuit is to form an LC filter circuit with the capacitor, which has the function of "through DC, blocking AC".
• ### Q What is the unit of inductance and how to convert it?

A
1. Symbol of inductance in the circuit: L;
2. Inductance unit: Heng (H), milliHen (mH), micro Heng (μH);
3. The conversion relationship is: 1H = 10 ^ 3mH = 10 ^ 6μH = 10 ^ 9nH.
• ### Q How to express the tolerance of inductance?

A Inductance tolerance is usually expressed in letters, with an error value of 20% represented by M; an error value of 10% represented by K; an error value of 5% represented by J; an error value of 1% represented by F. For example, 100M means 10μH, and the error is 20%. Inductance error calculation, the maximum allowable deviation of the inductance in the circuit refers to the allowable error between the nominal inductance on the inductor and the actual inductance.
• ### Q What are the magnetic cores of chip inductors?

A Common chip inductor cores are: manganese zinc ferrite, nickel zinc ferrite, magnetic powder core, etc.
• ### Q What are the main categories of inductance?

A
According to the working frequency classification: divided into high frequency inductance, medium frequency inductance, low frequency inductance.
According to the structure: fixed inductance, adjustable inductance.
Classification by function: filter inductance, choke inductance, oscillation inductance, isolation inductance, etc.
According to the packaging form: chip inductors, plug-in inductors.

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