S558-5999-Q3-F

Pulse Transformers Overview

The S558-5999-Q3-F is a Gigabit Ethernet magnetic module manufactured by Bel Fuse Inc. Designed for surface mount installation, this component supports 10/100/1000 Base-T data rates. It features a primary inductance of 350µH with a turns ratio of 1CT:1CT for both transmitter and receiver channels. The module operates within a temperature range of 0°C to 70°C and utilizes a 48-pin configuration housed in a compact surface-mount package.

Pulse Transformers Feature Summary

• Integrated Gigabit Ethernet magnetics solution supporting 10/100/1000 Base-T standards
• Surface mount design optimized for automated PCB assembly processes
• Symmetrical 1CT:1CT transformer configuration for balanced signal transmission

Pulse Transformers Applications

• Gigabit Ethernet network interface cards
• Industrial communication equipment requiring LAN connectivity
• Embedded systems with integrated Ethernet controllers

Pulse Transformers Procurement Notes

Verify the specific pinout and footprint compatibility with the target PCB layout before procurement. Confirm that the operating temperature range meets the environmental requirements of the end application. Ensure the surface mount package dimensions align with the manufacturing capabilities of the assembly line. Cross-reference the manufacturer's latest datasheet for any recent design changes or compliance updates.

Pulse Transformers Selection Notes

Select this component when a complete Gigabit Ethernet magnetics solution is required for space-constrained designs. The integrated nature reduces bill-of-materials complexity compared to discrete transformers. Consider the 48-pin configuration for high-density layouts. Verify that the 350µH inductance specification matches the impedance requirements of the connected PHY chip.

Pulse Transformers Part Context

This part belongs to Bel Fuse's LAN Discrete Transformer Modules series. It serves as a critical interface between the Ethernet controller and the physical medium. The module consolidates multiple passive components into a single surface-mount unit. This integration aids in reducing electromagnetic interference and simplifying the overall circuit design for network applications.

Pulse Transformers Replacement Considerations

S558-5999-P3-F is a documented substitute variant within the same product family. Both parts share similar electrical characteristics but may differ in physical dimensions or pin configurations. Verify mechanical fit and electrical compatibility before substituting. Consult official documentation for detailed comparison of form, fit, and function parameters.