E4001NL

Overview

The E4001NL is a LAN isolation transformer manufactured by Pulse Electronics, designed for 10BASE-T applications. It features a surface mount package with dimensions of 12.70mm x 7.24mm x 5.33mm. The component provides electrical isolation and data interface functionality with an inductance of 112µH. It utilizes a turns ratio of 1CT:2CT for the transmitter and 1CT:1CT for the receiver. The device supports a maximum DC resistance of 0.8 Ohms on the primary side and offers a high potential isolation of 3000Vrms. It operates within a temperature range of 0°C to 70°C and is RoHS3 compliant.

Feature Summary

• Provides galvanic isolation for 10BASE-T Ethernet networks
• Encapsulated design for robust data interface protection
• Surface mount construction for automated assembly

Applications

• 10BASE-T network interface cards
• Ethernet hub and switch ports
• LAN isolation circuits

Procurement Notes

Verify the specific ordering suffix to ensure correct packaging configuration, such as tape and reel or cut tape options. Confirm that the selected variant matches the required termination style and mounting orientation for the target PCB layout. Cross-reference the manufacturer part number with distributor catalogs to identify available package variants and ensure compatibility with existing supply chain channels.

Selection Notes

Select this component for designs requiring standard 10BASE-T isolation with surface mount constraints. Ensure the PCB footprint accommodates the specified 12.70mm x 7.24mm dimensions and 5.33mm height. Verify thermal management requirements against the 0°C to 70°C operating range. Consider the 112µH inductance value for impedance matching in the transmission line circuitry.

Part Context

This component belongs to the Pulse Electronics LAN isolation transformer series, specifically engineered for legacy 10BASE-T Ethernet standards. It serves as a critical interface element between the physical layer transceiver and the twisted-pair cabling. The encapsulated construction distinguishes it from discrete transformer solutions, offering integrated common-mode choke functionality within a compact form factor suitable for space-constrained networking hardware.

Replacement Considerations

The E4001NL is parameter-equivalent to the E4001NLT variant from the same manufacturer.