The ZE2531 Series from Coilcraft are Isolation Transformers designed for 10Base-T1L applications. They have an inductance of 1.0-2.2 mH and an inductance tolerance of +/- 30%. These transformers have a maximum DC resistance of 0.185-0.516 ohms and a leakage inductance of 0.090-0.130 µH. They have a turn ratio of 1:1 and an RMS current rating of 520-1000 A. These AEC-Q200 Grade 1-qualified transformers include a ferrite core material and are compliant with IEEE802.3cg standard. They provide an isolation voltage of 3000 V for 1 minute across its windings. These RoHS-compliant transformers are available in a surface-mount package that measures 16 x 4.8 x 0.4 mm.