Würth Elektronik 749010110 LAN Transformer Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 749010110 is a 350µH LAN 10/100 Base-T pulse transformer with 1:1 turns ratio, designed for surface mount applications. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates within the WE-LAN series and maintains full RoHS3 compliance with MSL 1 rating.

Substiute Parts

749010110

Würth ElektronikIn Stock: 2621749010110 Datasheet

Current PartRFQ

749020100A

Würth ElektronikIn Stock: 2237749020100A Datasheet

MFR RecommendedRFQ

H0068ANL

Pulse ElectronicsIn Stock: 6999H0068ANL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 749010110 are qualified based on the following critical parameters:

• Transformer Type: LAN 10/100 Base-T or LAN 10/100/1000 Base-T compatibility
• Inductance: 350µH nominal value
• Turns Ratio: 1:1 primary to secondary configuration
• Mounting Type: Surface mount package
• Compliance: RoHS3 or RoHS compliant status
• MSL Rating: 1 (Unlimited) moisture sensitivity level

Two substitute parts meet these criteria: the Würth Elektronik 749020100A (manufacturer recommended, active status) and the Pulse Electronics H0068ANL (active status, alternative manufacturer).

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 749020100A is the manufacturer-recommended substitute, maintaining the same inductance value (350µH), turns ratio (1:1), and series designation (WE-LAN). This part carries active product status with extended operating temperature range (-40°C ~ 105°C) and RoHS3 compliance. The increased height (3.25mm vs. 2.16mm) and width (8.60mm vs. 7.11mm) require PCB layout verification for space-constrained applications.

The Pulse Electronics H0068ANL provides an alternative from a different manufacturer with active status and RoHS compliance. This part maintains the lowest profile height (2.08mm) and operates within 0°C ~ 70°C temperature range. The turns ratio configuration (1CT:1CT Transmitter, 1CT:1CT Receiver) and bulk packaging differ from the original specification.

Both substitutes maintain MSL 1 rating and REACH unaffected status, ensuring compliance with moisture and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 749020100A directly replace the 749010110 in all applications?

A: The 749020100A maintains identical inductance (350µH) and turns ratio (1:1) specifications. Physical dimensions differ; verify PCB layout accommodates the increased height (3.25mm) and width (8.60mm). The extended operating temperature range (-40°C ~ 105°C) provides broader environmental capability.

Q: What are the key differences between the Würth and Pulse substitute options?

A: The Würth 749020100A offers manufacturer continuity, extended temperature range, and tape & reel packaging. The Pulse H0068ANL provides lower profile height (2.08mm), alternative sourcing, and bulk packaging. Temperature operating range differs: Würth supports -40°C ~ 105°C; Pulse supports 0°C ~ 70°C.

Q: Does the H0068ANL turns ratio configuration affect compatibility?

A: The H0068ANL specifies 1CT:1CT Transmitter and 1CT:1CT Receiver configuration versus the standard 1:1 ratio. Circuit-level validation is required to confirm functional equivalence in the target application.

Q: Are there packaging considerations for production transition?

A: The 749010110 and 749020100A are supplied in tape & reel format suitable for automated assembly. The H0068ANL is supplied in bulk packaging, requiring manual handling or reel preparation for pick-and-place equipment.

Q: Do all substitute parts maintain the same compliance certifications?

A: All three parts are RoHS compliant (749010110 and 749020100A are RoHS3; H0068ANL is RoHS). All maintain MSL 1 rating and REACH unaffected status.