34L682C Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The 34L682C is a 6.8 µH shielded wirewound inductor manufactured by Murata Power Solutions Inc., designed for surface mount applications with a current rating of 680 mA and maximum DC resistance of 265mOhm. 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 125°C and is RoHS compliant with MSL 1 rating.

Substiute Parts

34L682C

Murata Power Solutions Inc.In Stock: 90234L682C Datasheet

Current PartRFQ

744042006

Würth ElektronikIn Stock: 2187744042006 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 34L682C is determined by strict alignment of the following electrical and mechanical parameters:

• Inductance Value: Must be 6.8 µH with ±30% tolerance to maintain circuit performance
• Shielding: Must be shielded to preserve electromagnetic isolation characteristics
• Mounting Type: Must be surface mount to ensure PCB compatibility
• Operating Temperature Range: Must support -40°C to 125°C minimum
• Current Handling: Substitute must support at least 680 mA continuous current rating
• DC Resistance: Lower DCR values are acceptable as they represent improved performance
• Compliance: Must maintain RoHS and REACH compliance status

The Würth Elektronik 744042006 qualifies as a direct substitute based on these criteria. It maintains the same inductance value and tolerance, operates within the required temperature range, and exceeds the current rating requirement while providing superior DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 744042006 from Würth Elektronik is the qualified substitute for the obsolete 34L682C. Selection is based on the following engineering criteria:

• Electrical Equivalence: Both components provide 6.8 µH inductance with identical ±30% tolerance, ensuring circuit performance parity
• Current Margin: The substitute provides 1.5 A rating versus the original 680 mA requirement, offering 2.2× current headroom for design robustness
• Resistance Improvement: The 100mOhm maximum DCR of the substitute represents a 62% reduction compared to the original 265mOhm specification, resulting in lower power dissipation
• Compliance Status: The substitute maintains RoHS compliance (ROHS3) and REACH unaffected status, meeting current regulatory requirements
• Product Availability: The substitute is active in production with 2110 units in stock, ensuring supply chain continuity
• Temperature Compatibility: Both components operate across -40°C to 125°C, maintaining thermal performance equivalence
• Moisture Sensitivity: Both components carry MSL 1 rating, indicating no moisture sensitivity concerns

Frequently Asked Questions (FAQ)

Q: Can the 744042006 be used as a direct replacement for the 34L682C in existing designs?

A: Yes. Both components share identical inductance values (6.8 µH) and tolerance (±30%), operate across the same temperature range (-40°C to 125°C), and maintain shielded surface mount configurations. The substitute exceeds the original current rating and provides superior DC resistance characteristics.

Q: What are the physical package differences between these inductors?

A: The 34L682C uses a nonstandard package measuring 0.205" × 0.205" (5.20mm × 5.20mm) with 0.047" (1.20mm) seated height. The 744042006 uses the 1919 (4848 Metric) package measuring 0.189" × 0.189" (4.80mm × 4.80mm) with 0.079" (2.00mm) seated height. PCB footprint verification is required before implementation.

Q: Does the lower DC resistance of the substitute affect circuit operation?

A: No. Lower DC resistance (100mOhm versus 265mOhm) represents improved performance, reducing resistive losses and heat generation. This change is beneficial for circuit efficiency and does not negatively impact functionality.

Q: Are there compliance or certification differences between the original and substitute?

A: Both components are RoHS compliant and REACH unaffected. The substitute carries ROHS3 certification, which represents current regulatory alignment. Both maintain MSL 1 moisture sensitivity rating.

Q: What is the saturation current of the substitute?

A: The 744042006 has a saturation current (Isat) of 1.2 A, which exceeds the 680 mA operating requirement of the original design, providing additional design margin.