Würth Elektronik 749020013 LAN Transformer Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 749020013 is a 350µH LAN 10/100/1000 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 across the industrial temperature range of -40°C to 85°C and meets ROHS3 compliance requirements.

Substiute Parts

749020013

Würth ElektronikIn Stock: 747749020013 Datasheet

Current PartRFQ

749020011A

Würth ElektronikIn Stock: 3432749020011A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 749020013 is based on the following critical parameters that must remain constant:

• Inductance Value: 350µH (primary electrical characteristic)
• Turns Ratio: 1:1 (functional requirement for signal integrity)
• Transformer Type: LAN 10/100/1000 Base-T (application-specific specification)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Operating Temperature Range: -40°C to 85°C (environmental specification)
• Compliance Standards: ROHS3 and REACH requirements

The recommended substitute part 749020011A maintains all critical electrical and functional parameters while offering improved availability and updated packaging options. Both parts belong to the WE-LAN series and are designed for identical LAN applications.

Parameter Comparison

Engineering Selection Recommendations

The 749020011A is the manufacturer-recommended substitute for the obsolete 749020013. Both components maintain identical electrical specifications (350µH inductance, 1:1 turns ratio) and functional characteristics for LAN 10/100/1000 Base-T applications. The substitute part is currently in Active product status with significantly higher inventory availability (3364 Pcs vs. 718 Pcs).

Dimensional differences are minor: the substitute is slightly narrower (0.689" vs. 0.705") but marginally taller (0.256" vs. 0.230"). PCB layout verification is required to confirm clearance compatibility. The substitute offers improved moisture handling (MSL 1 vs. MSL 4), reducing storage and handling constraints during manufacturing.

Both parts meet ROHS3 and REACH compliance requirements. The substitute is supplied in Tape & Reel packaging, suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can 749020011A be used as a direct replacement for 749020013?

A: Yes, provided PCB layout accommodates the dimensional differences. The substitute maintains all critical electrical parameters: 350µH inductance, 1:1 turns ratio, and LAN 10/100/1000 Base-T functionality. Verify clearance for the increased height (6.50mm vs. 5.84mm) and width (14.20mm vs. 12.19mm).

Q: What are the key differences between these parts?

A: The primary differences are product status (Obsolete vs. Active), packaging format (Bulk vs. Tape & Reel), moisture sensitivity level (MSL 4 vs. MSL 1), and minor dimensional variations. Electrical specifications and operating temperature range are identical.

Q: Does the MSL difference affect compatibility?

A: The MSL difference reflects manufacturing and storage characteristics, not functional performance. MSL 1 (unlimited shelf life) on the substitute provides operational advantages during inventory management and production scheduling compared to MSL 4 (72-hour limit).

Q: Are there any compliance concerns with substitution?

A: No. Both parts maintain ROHS3 compliance and REACH Unaffected status. Regulatory requirements are satisfied by either component.

Q: What packaging considerations apply?

A: The 749020013 is supplied in bulk packaging, while 749020011A is supplied in Tape & Reel format. Tape & Reel packaging is optimized for automated pick-and-place assembly and reduces manual handling.