Würth Elektronik 749022015 LAN Transformer Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 749022015 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 system support and new design implementations. The transformer operates within the WE-LAN series and maintains full ROHS3 compliance with unlimited moisture sensitivity rating (MSL 1).

Substiute Parts

749022015

Würth ElektronikIn Stock: 1976749022015 Datasheet

Current PartRFQ

7490220122

Würth ElektronikIn Stock: 14597490220122 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 749022015 is determined by the following critical parameters:

• Transformer Type: LAN 10/100/1000 Base-T (must match for signal integrity and frequency response)
• Inductance: 350µH (core electrical characteristic for impedance matching)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Series Compatibility: WE-LAN series (manufacturer design family)
• Compliance Standards: ROHS3 and REACH status (regulatory requirements)

The substitute part 7490220122 maintains identical inductance (350µH), transformer type (LAN 10/100/1000 Base-T), mounting configuration (Surface Mount), and regulatory compliance. The primary differences are packaging format (Tape & Reel vs. Cut Tape & Digi-Reel), physical dimensions, and product status (Active vs. Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The 7490220122 serves as the active production substitute for the obsolete 749022015. Both components share identical core electrical specifications (350µH inductance, LAN 10/100/1000 Base-T transformer type, 1:1 turns ratio configuration) and maintain equivalent regulatory compliance (ROHS3, REACH Unaffected, EAR99 classification).

Selection between these parts depends on application requirements:

• For new designs or production transitions: The 7490220122 is the appropriate choice due to Active product status and documented operating temperature range (-40°C ~ 85°C).
• For legacy system support: The 749022015 remains available in current inventory (1937 Pcs) if exact form factor matching is required.
• For PCB layout considerations: The 7490220122 features reduced height (0.346" vs. 0.404") and slightly increased width (0.579" vs. 0.511"), requiring PCB footprint verification before implementation.

Both parts maintain identical MSL 1 (Unlimited) moisture sensitivity and are suitable for high-reliability applications requiring ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the 7490220122 directly replace the 749022015 in existing designs?

A: Electrical substitution is valid due to matching inductance (350µH), transformer type (LAN 10/100/1000 Base-T), and turns ratio configuration. Physical dimensions differ slightly; PCB footprint compatibility must be verified before implementation.

Q: What is the significance of the turns ratio difference (1:1 vs. 1CT:1CT)?

A: Both configurations maintain 1:1 turns ratio functionality. The 7490220122 designation specifies center-tap configuration for transmitter and receiver circuits, which is functionally equivalent for LAN 10/100/1000 Base-T applications.

Q: Are there packaging implications when switching from 749022015 to 7490220122?

A: Yes. The 749022015 is supplied in Cut Tape (CT) & Digi-Reel® format, while the 7490220122 uses Tape & Reel (TR) packaging. Assembly line equipment compatibility should be confirmed.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both components are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 under export control regulations. HTSUS classification (8504.31.2000) is identical.

Q: What is the inventory status for each part?

A: The 749022015 (Obsolete) has 1937 Pcs in stock. The 7490220122 (Active) has 1353 Pcs in stock. For long-term supply assurance, the Active part is recommended.