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?.EI19 high frequency transformer size(unit:mm)FEATURES:-High Power-Low Profile-Inexpensive Type-High Reliability- Low price- Cost-effective- High impedance and low loss-High Conversion Efficiency-Easily Inserted into PCB- RoHS compliance and UL- Custom designs are welcome, Can specify special materials, the skeleton shape can be customized.APPLICATION:-DC/DC Converter Transformer-Current Transformer-Switching power supply, Adapter and UPS-Computer products-DVD-LED power board-LCD TV & Monitor Displays Power Boards-Consumer Electric Products & Battery Charger, Printers- Specially used in switching power supply and kinds of high-frequency circuit- Plays a role in oscillating and separatingSPECIFICATIONS:-Operating Temperature: -25? to +60?-Storage Temperature: -25? to +85?-Operating Humidity: 30 to 95%RH-Storage Humidity: 30 to 95%RHRequirement for inquiry:In order to quote you coorectly, pls provide the following information:1)Specification including Bobbin, Core, Type, Wire diameter, number of phase and each coil, size and winding drawing.2)Sample, drawing, photo will be help a lot.link:http://www.ht-transformer.com/low-frequency-transformer/ei-series-audio-transformer/ce-rohs-approved-ferrite-core-high-frequency-e.html