Würth Elektronik 74454068 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74454068 is a 7 µH shielded drum core wirewound inductor rated for 2.2 A continuous current with a maximum DC resistance of 55 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is classified as Active product status. Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design flexibility permits operation within the specified parameter tolerances of alternative qualified inductors.

Substiute Parts

74454068

Würth ElektronikIn Stock: 163574454068 Datasheet

Current PartRFQ

SRR1005-6R8M

Bourns Inc.In Stock: 4576SRR1005-6R8M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns Inc. SRR1005-6R8M qualifies as a direct substitute based on the following alignment with critical electrical and mechanical parameters:

Matching Parameters:

• Current Rating: 2.2 A (identical)
• Shielding: Shielded (identical)
• Operating Temperature: -40°C to 125°C (identical)
• Package Dimensions: 12.70mm L x 10.00mm W x 5.20mm H (identical)
• Mounting Type: Surface Mount (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Inductance Tolerance Consideration: The SRR1005-6R8M provides 6.8 µH inductance with ±20% tolerance, placing the upper tolerance band at 8.16 µH. This overlaps with the 74454068 specification of 7 µH ±20% (5.6 µH to 8.4 µH), permitting substitution in applications where the inductance range is acceptable within circuit design margins.

Parameter Comparison

Engineering Selection Recommendations

Both components maintain Active product status and ROHS3 compliance, ensuring regulatory alignment and ongoing manufacturer support. The SRR1005-6R8M presents a viable alternative where inductance variation within the ±20% tolerance band is acceptable to circuit design specifications. The primary electrical differences—saturation current of 2.8 A versus 4.1 A, and DC resistance of 75 mOhm versus 55 mOhm—require evaluation against specific application current profiles and thermal dissipation requirements. Identical package geometry and mounting characteristics ensure mechanical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the SRR1005-6R8M directly replace the 74454068 in all applications?

A: Substitution is valid where the inductance tolerance band overlap (5.6 µH to 8.16 µH) satisfies circuit requirements. Applications with tight inductance specifications or those operating near the 2.2 A current limit require evaluation of the lower saturation current (2.8 A) of the substitute part.

Q: What is the impact of the 20 mOhm DC resistance difference?

A: The SRR1005-6R8M exhibits 75 mOhm maximum DC resistance compared to 55 mOhm for the 74454068. At 2.2 A continuous current, this results in approximately 4.4 mW additional power dissipation. Thermal analysis is required for applications with stringent thermal budgets.

Q: Are the package dimensions identical?

A: Yes. Both components share identical surface mount package dimensions of 12.70mm L x 10.00mm W x 5.20mm H, permitting direct PCB footprint compatibility without layout modification.

Q: Do both parts meet the same regulatory requirements?

A: Both components are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status, ensuring equivalent regulatory qualification for industrial applications.

Q: What is the difference in self-resonant frequency?

A: The 74454068 exhibits a self-resonant frequency of 33 MHz, while the SRR1005-6R8M operates at 35 MHz. This 2 MHz difference is negligible for most DC-biased inductor applications but should be verified for high-frequency filtering or resonant circuit designs.