| Application | LAN; 10/100 BASE-T |
| Height | 5.72 mm |
| Insertion Loss | 1 dB |
| Isolation Voltage | 1.5 kV |
| Length | 12.7 mm |
| Manufacturer | Bel Fuse |
| Manufacturer Part Number | S558-5999-T5 |
| Manufacturer Series | S558-5999 |
| Mounting Feature | SURFACE MOUNT |
| Number of Functions | 1 |
| Number of Secondary Winding | 2 |
| Operating Frequency-Max | 100 MHz |
| Operating Frequency-Min | 100 kHz |
| Operating Temperature-Max | 85 ?C |
| Operating Temperature-Min | -40 ?C |
| Packaging | - |
| Physical Dimension | L12.7XB7.24XH5.72 (mm) |
| Primary Inductance | 350 ?H |
| Subcategory | Other Transformers |
| Surface Mount | YES |
| Transformer Type | DATACOM TRANSFORMER |
| Turns Ratio (Np:Ns) | 1CT:1CT; 1CT:1CT |