Equivalent & Substitute Parts for Würth Elektronik 749020102

Part Overview

The Würth Elektronik 749020102 is a pulse transformer designed for LAN applications. This component is classified as Obsolete and is no longer in active production. Due to its obsolete status, sourcing original units becomes increasingly difficult. The substitute part 749020100A is the manufacturer-recommended replacement, offering equivalent functional performance with active product status and improved availability.

Substiute Parts

749020102

Würth ElektronikIn Stock: 3417749020102 Datasheet

Current PartRFQ

749020100A

Würth ElektronikIn Stock: 2237749020100A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute relationship between 749020102 and 749020100A is established by Würth Elektronik as the official manufacturer recommendation. Both components function as LAN pulse transformers within the same product family. The substitution is valid based on the following criteria:

• Transformer Type: Both are LAN 10/100/1000 Base-T pulse transformers
• Turns Ratio: Both maintain 1:1 primary to secondary turns ratio
• Inductance: Both specify 350µH inductance value
• Mounting Technology: Both are surface mount components
• Electrical Performance: Functionally equivalent for LAN applications
• Compliance: Both meet RoHS3 and REACH requirements

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: Würth Elektronik 749020100A

The 749020100A is the manufacturer-designated substitute for the obsolete 749020102. Selection of this component is based on:

• Active Product Status: 749020100A maintains active production status with reliable long-term availability
• Regulatory Compliance: Full RoHS3 and REACH compliance ensures compatibility with current manufacturing and environmental standards
• Moisture Sensitivity: MSL Level 1 rating provides maximum handling flexibility without special storage requirements
• Inventory Availability: 2160 pieces in current stock support immediate procurement
• Functional Equivalence: Identical LAN 10/100/1000 Base-T transformer specifications with 1:1 turns ratio and 350µH inductance

For new designs or component refresh cycles, 749020100A is the appropriate selection. For legacy system maintenance where original 749020102 units remain available, either component may be used interchangeably based on application requirements and inventory constraints.

Frequently Asked Questions (FAQ)

Q: Can 749020100A directly replace 749020102 in existing designs?

A: Yes. Both components are LAN 10/100/1000 Base-T pulse transformers with identical 1:1 turns ratio and 350µH inductance specifications. The 749020100A is the manufacturer-recommended substitute.

Q: What is the primary reason for substitution?

A: The 749020102 is classified as obsolete. The 749020100A maintains active production status and ensures long-term component availability for new production runs and system updates.

Q: Are there packaging differences between these parts?

A: The 749020100A is supplied in Tape & Reel (TR) packaging, which is the standard format for surface mount production. The original 749020102 packaging specification is not documented.

Q: Do both parts meet current regulatory requirements?

A: The 749020100A is fully compliant with RoHS3 and REACH regulations. Regulatory status for the obsolete 749020102 is not specified in available documentation.

Q: What is the moisture sensitivity level for these transformers?

A: The 749020100A carries MSL Level 1 rating, indicating unlimited shelf life without special moisture control measures. This is the lowest moisture sensitivity classification.

Q: Are the physical dimensions compatible for PCB layout?

A: The 749020100A measures 12.70mm length × 8.60mm width × 3.25mm maximum height. These are standard surface mount dimensions. Original 749020102 dimensions are not specified.

Q: What is the operating temperature range?

A: The 749020100A operates across -40°C to 105°C, covering industrial and commercial temperature ranges. Original 749020102 operating temperature is not specified.