1. The appearance is different. The simplest difference is that the three pin inductor has three pins (ends), while the conventional inductor has only two pins (ends).

2. The production process is different. The conventional inductors are produced by using one group of winding wires, while the three pin inductors are produced by using two groups of winding wires. At the same time, the number of turns of the two groups of winding wires is also different

3. Application environment and function. Conventional inductance is used in DC-DC conversion circuit for filtering, choke and oscillation. The three pin inductor is often used in the step-up circuit. In many cases, it can be used as a small transformer. Three pin inductors are usually used in buzzers or alarm systems.