PA1558NL

Overview

The PA1558NL is a surface-mount LAN transformer module manufactured by Pulse Electronics, designed for 10Base-T applications without Power over Ethernet (PoE) support. It features a single channel with SMD/SMT termination and operates within a frequency range of 10 MHz to 100 MHz. Key electrical parameters include an inductance of 160 uH, primary coil impedance of 700 Ohms, and secondary coil impedance of 200 Ohms. The device provides 1.5 kV isolation voltage and has a maximum DC resistance of 300 mOhms. It functions as an unshielded module with dimensions of 0.5 in x 0.38 in x 0.236 in, suitable for temperatures between 0 C and +70 C.

Feature Summary

• Provides electrical circuit isolation compliant with IEEE 802.3 standards for signal integrity
• Optimized for integration with major LAN transceivers in 10Base-T networks
• Supports peak reflow temperature ratings up to +245°C for robust surface mount processing

Applications

• 10Base-T network interface circuits
• LAN transceiver modules requiring non-PoE isolation
• Ethernet port signal conditioning

Procurement Notes

Verify the specific datasheet version and RoHS compliance status prior to procurement, as manufacturer specifications may undergo updates. Confirm that the application environment remains within the specified operating temperature range of 0 C to +70 C. Ensure the design accommodates the physical footprint of 0.5 in x 0.38 in x 0.236 in. Cross-reference the pinout configuration with the target PCB layout to guarantee correct SMD/SMT alignment during assembly.

Selection Notes

Select the PA1558NL when designing 10Base-T systems that require galvanic isolation without PoE power delivery capabilities. This component is appropriate for applications prioritizing standard LAN signal integrity over higher-speed Ethernet protocols. Consider the unshielded nature of the module when evaluating electromagnetic interference requirements. Verify that the 160 uH inductance and specified impedance values align with the transceiver's matching network requirements.

Part Context

This component belongs to Pulse Electronics' LAN discrete transformer modules series, which are engineered to meet IEEE 802.3 standards. The series focuses on providing reliable electrical isolation while maintaining signal quality for demanding network applications. These modules are characterized by their optimization for various LAN transceivers and their ability to withstand high peak reflow temperatures during manufacturing processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.