S558-5999-U7-F

Pulse Transformers Overview

The S558-5999-U7-F is a single-port LAN magnetic module designed for 10/100BASE-T applications. It features an inductance of 350µH and supports IEEE 802.3 standards with 8mA bias capability. The component utilizes a surface-mount package measuring 12.32mm x 7.24mm x 5.72mm. It operates within a temperature range of -40°C to +85°C and includes 1CT:1CT turns ratios for both transmitter and receiver circuits.

Pulse Transformers Feature Summary

• Complies with IEEE 802.3 standards for 10/100BASE-T Ethernet connectivity
• Integrates single-port transformer module with defined transmitter and receiver configurations
• Supports standard bias current requirements for signal integrity

Pulse Transformers Applications

• Ethernet network interface cards
• Computer motherboards with integrated LAN ports
• Industrial networking equipment requiring 10/100 Mbps connectivity

Pulse Transformers Procurement Notes

Verify the manufacturer part number S558-5999-U7-F against official Bel Fuse documentation to confirm specifications. Ensure compatibility with your PCB footprint dimensions of 12.32mm by 7.24mm. Check that the operating temperature range of -40°C to +85°C meets your environmental requirements. Confirm RoHS compliance status if required by your manufacturing standards.

Pulse Transformers Selection Notes

Select this component when designing systems requiring certified 10/100BASE-T isolation. The 350µH inductance value must align with your transformer design specifications. Consider the surface-mount package size for board space constraints. Verify that the single-port configuration matches your network topology needs without requiring additional multiplexing.

Pulse Transformers Part Context

This component belongs to Bel Fuse's LAN magnetic solutions portfolio, specifically engineered for Ethernet physical layer interfaces. It serves as a critical isolation and impedance matching element between the MAC controller and the RJ45 connector. The module integrates common mode chokes and center-tapped transformers into a compact form factor suitable for high-density electronic assemblies.

Pulse Transformers Replacement Considerations

Consult official substitution guides for compatible single-port 10/100BASE-T modules. Verify pinout compatibility and electrical parameters before replacing existing inventory.