ARJ14A-MFSD-MU2 is an RJ45 10/100/1000 Base-TX 1x4 jack with an integrated magnetic module designed for Gigabit Ethernet connectivity. This tab-down connector features a 1CT:1CT transformer ratio for both TX and RX, with typical insertion loss of -1.2 dB across 0.3-100 MHz and return loss specifications of -18 dB at 1-10 MHz, -16 dB at 30 MHz, and -12 dB at 60-80 MHz. The module offers crosstalk performance of -40 dB at 1-10 MHz, -35 dB at 30-60 MHz, and -30 dB at 60-100 MHz, along with common mode rejection of -30 dB at 1-50 MHz and -20 dB at 50-130 MHz. It operates over a temperature range of 0°C to +70°C with storage capability from -40°C to +85°C, and is rated for 1500 Vrms hipot. The RoHS-compliant connector is suitable for CAT 5 and CAT 6 cables, complies with IEEE 802.3ab, and is ideal for 10/100/1000 Base-T LAN, NIC, LoM, and PC applications.