Würth Elektronik 749020100 LAN Transformer Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 749020100 is a 350µH LAN 10/100/1000 Base-T Pulse Transformer with 1:1 turns ratio, designed for Surface Mount applications. This part is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The transformer operates within the WE-LAN series and maintains ROHS3 compliance with MSL 1 rating.

Substiute Parts

749020100

Würth ElektronikIn Stock: 3757749020100 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

Substitution eligibility for the 749020100 is determined by the following critical parameters:

Primary Substitution Criteria:

• Transformer Type: LAN 10/100/1000 Base-T or LAN 10/100 Base-T
• Inductance: 350µH (where specified)
• Turns Ratio: 1:1 configuration
• Mounting Type: Surface Mount
• RoHS Compliance: ROHS3 or RoHS Compliant
• MSL Rating: 1 (Unlimited)

Identified Substitutes:

1. 749020100A (Würth Elektronik) – Manufacturer-recommended active replacement within the same WE-LAN series. Maintains identical electrical specifications with updated packaging (Tape & Reel) and extended operating temperature range.

2. H0068ANL (Pulse Electronics) – Cross-manufacturer substitute supporting LAN 10/100 Base-T applications. Functionally compatible for 10/100 Mbps operations with equivalent MSL and RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

749020100A (Würth Elektronik) is the primary recommended substitute. As an Active product from the same manufacturer and series, it provides direct functional equivalence with identical electrical specifications (350µH inductance, 1:1 turns ratio, LAN 10/100/1000 Base-T support). The updated packaging format (Tape & Reel) supports modern manufacturing workflows. Extended operating temperature range (-40°C ~ 105°C) provides broader environmental compatibility. ROHS3 compliance and MSL 1 rating maintain regulatory and handling requirements.

H0068ANL (Pulse Electronics) serves as a secondary cross-manufacturer alternative for applications limited to LAN 10/100 Base-T operation. This part is suitable where 1000 Mbps capability is not required. Compact height (2.08mm) may offer advantages in space-constrained designs. RoHS compliance and MSL 1 rating satisfy standard compliance requirements. Operating temperature range (0°C ~ 70°C) is narrower than 749020100A and should be verified against application requirements.

Both substitutes maintain REACH Unaffected status and EAR99 ECCN classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can 749020100A directly replace 749020100 in existing designs?

A: Yes. The 749020100A maintains identical electrical specifications (350µH, 1:1 turns ratio, LAN 10/100/1000 Base-T). Physical dimensions differ slightly (12.70 x 8.60mm vs. 12.83 x 6.70mm) and height increases from 2.16mm to 3.25mm. PCB layout verification is required to confirm clearance compatibility.

Q: What is the functional difference between 749020100A and H0068ANL?

A: The primary difference is network speed support. The 749020100A supports LAN 10/100/1000 Base-T (Gigabit), while H0068ANL supports LAN 10/100 Base-T only. For applications requiring Gigabit Ethernet capability, 749020100A is the appropriate choice. For 10/100 Mbps applications, H0068ANL is functionally equivalent.

Q: Are there packaging considerations when switching between these parts?

A: Yes. The 749020100 and 749020100A differ in standard packaging format (unspecified vs. Tape & Reel). H0068ANL is supplied in Bulk packaging. Verify packaging compatibility with your procurement and assembly processes.

Q: Do all three parts meet the same compliance standards?

A: All three parts are RoHS compliant (ROHS3 or RoHS), REACH Unaffected, and carry MSL 1 (Unlimited) ratings. Compliance requirements are satisfied across all substitutes.

Q: What operating temperature range should I consider for substitute selection?

A: The 749020100A provides the widest operating range (-40°C ~ 105°C). The H0068ANL operates within 0°C ~ 70°C. Verify your application's thermal requirements against these ranges before selection.