High Frequency Transformers
Frequency range: up to 600kHz
Mountings: Surface mount, Thru-hole & Leads
Power Rating: 1VA to 20kVA
Input/Output Voltages: 1V to 10kV
High Frequency Transformer Ferrite Core Selection Guide
The selection of the ferrite core type for a specific transformer depends on the design parameters and the designer’s personal preferences. The indicative power capacity for different core types (chart below) provides a general guideline for an initial core selection.
Power Capacity by Core Type
|
Power range (W) |
Core type using N87* grade material |
|
<5 |
RM4; P11/7; EF12.6; U10 |
|
5-10 |
E(F)16; RM5; P14/8 |
|
10-20 |
RM6; E(F)20; P18; U15; EFD15 |
|
20-50 |
RM8; P22; RM10 ETD29; E25; EFD20 |
|
50-100 |
ETD29; ETD34; RM12; P30; EFD25 |
|
100-200 |
ETD34; ETD39; ETD44; P36; E30; E42; EFD30 |
|
200-500 |
ETD44; ETD49; E55 |
|
>500 |
ETD54; ETD59; E65 |
Note:The power capacity of each core type varies due to differences in topology, operating frequency and temperature, flux density, and material grade.
* EPCOS material grade
Ferrite Core nominal dimensions & footprints
| E cores and accessories |  |
Range: E5 –E70 |
| EFD cores and accessories | |
Range: EFD10 –EFD30 |
| EP cores and accessories | |
Range: EP7 – EP20 |
| ER cores and accessories | |
Range: E9.5 –ER54 |
| ETD cores and accessories | |
Range: ETD29 –ETD59 |
| P cores and accessories | |
Range: P 5.8 – P48 |
| PQ cores and accessories | Range: PQ20 – PQ35 | |
| RM cores and accessories | |
Range: RM4 – RM14 |
Note: Dimensions & footprints above correspond to EPCOS product. Other manutacturer's dimensions can vary.
