EF 20 power pulse transformer , Electronic Transformer ,High Voltage Transformer has EF 20 core is a specific type of core shape and size used in transformers. It is typically made of laminated iron or steel sheets to reduce eddy current losses and improve efficiency.

| Spec | Size(mm) | |||||||
| A | B | C | D | E | F | G | H | |
| EF20 | 22.0 | 18.5 | 4.0 | 23.0 | 0.8 | 5.0 | 4.0 | 18.2 |
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