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Built with an optimized ER39 core structure, this transformer offers high power handling capability, low core loss, and reduced leakage inductance, making it ideal for high-density and high-reliability designs. It operates efficiently over a wide frequency range and maintains low temperature rise even under continuous load conditions.
With robust insulation design and flexible customization options, the ER3902 transformer is widely used in industrial, consumer, and communication power applications requiring stable and efficient power conversion.
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Features：
Good magnetic performance, low magnetic leakage,Low energy loss, strong interference immunity
Applications：
Switching mode power supplies, chargers, inverters, lighting (pool/garden light included)
Alarm systems, robots/automation equipment, servers, communication equipment
Electric vehicles, medical equipment
| Item | Specifications |
| Product Series | ER-type transformer series |
| Core Size | Diverse core size options |
| Operating Frequency | Broad high-frequency range: 15kHz to over 1.2MHz |
| Divided bands: | |
| 15kHz-60kHz | |
| 60kHz-120kHz | |
| 120kHz-600kHz | |
| 600kHz-1.2MHz | |
| Over 12MHz | |
| Power Coverage | Less than 8W up to 600W-1200W |
| Specific intervals: | |
| 8W-15W | |
| 15W-25W | |
| 25W-60W | |
| 60W-120W | |
| 120W-250W | |
| 250W-600W | |
| Typical Parameters | Operating frequency: 20kHz-500kHz |
| Output power: 80W-200W | |
| Operating Temperature | -40℃ to +125℃ |
| Product Functions | Flyback transformer, drive transformer, control transformer, inverter transformer, SMPS transformer |
| Also can be used as high-current inductor or isolated signal transformer | |
| Typical Applications | DC-DC converters, drive transformers, notebook power supplies, inverter power supplies, UPS, communication power supplies |
| Bobbin Style | Traditional bobbin styles |
| Customization & Service | All design parameters can be strictly customized according to customer requirements or industry specifications |
| Fully support global ODM/OEM cooperation |
Technical Specifications
