Learn Unicreed which types transformers could be used in PCB board, such as the following:
- 50/60Hz Encapsulated Transformer (0.35VA-24V)
- Toroidal Transformer (15VA-3000VA)
- Open frame/Linear Transformer (1.1VA-600VA)
- High Frequency Transformer
- Common Mode Choke(1.5W-35W)
- Coils
1. 50/60Hz Encapsulated Transformer (0.35VA-24V)

Applications:
LED Lighting, Electric Metering, Motor Controls, Thermostats and other similar fields
2. Toroidal Transformer (15VA-3000VA)

Applications:
Medical equipment, telecommunication instruments, lighting, sound equipment, automatic control equipment and so on.
3. Open frame/Linear Transformer (1.1VA-600VA)

Applications:
Medical equipment, power transformer, machine tool, measuring instrument and so on.
4. High Frequency Transformer

Applications:
Mobile phone charger, electronic ballast, switching power supply, color TV power supply, computer power supply, LCD driver and power supply etc.
5. Common Mode Choke(1.5W-35W)

Applications:
Electronic measuring instruments, computer room equipment, switching power supply, measurement and control system etc.
6. Coils

Applications:
Reactor,it is widely used in the field of radio