749020023A 10/100/1000 Base-T 1 Port SMT Transformer Introduction:
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Electrical Specifications @ 25°C 1.Turn Ratio(TX/RX): Pri:Sec=1CT:1CT ±5%P2.Inductance OCL: 350uH Min,100KHz/0.1V 8mA DC BLAS 3. Insertion Loss: 1-100MHz:-1.0dB Max 4. Return Loss: 1-30MHz:-18dB Min 40MHz:-14.4dB Min 50MHz:-13.1dB Min 60-80MHz:-12dB Min 5. Crosstalk: 30MHz:-45dB Min 60MHz:-40dB Min 100MHz:-35dB Min |  6. DCMR: 30MHz:-40dB Min 60MHz:-35dB Min 100MHz:-30dB Min 7. Isolation Voltage: 1500Vrms 8. Operating Temperature: -40℃~+85℃ |
749020023A SMT Transformer Sechematic:

Applications of SMT WE LAN Transformers:
- Suitable for industrial temperatures from –40 °C up to +125 °C
- Compatible to Industrial Ethernet systems like EtherCAT or Profinet
- Compliant with most ICs for Ethernet applications such as Microchip, Texas Instruments, Broadcom, Linear Technology
- Hubs, Routers, Switches, IP cameras, IoT applications
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