Würth Elektronik 74457027 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74457027 is a 2.7 µH unshielded drum core wirewound inductor rated for 10 A continuous current with a maximum DC resistance of 8 mOhm. This component is part of the WE-PD4 series and is actively manufactured. Alternative parts may be required due to inventory constraints, application-specific performance requirements, or supply chain considerations.

Substiute Parts

74457027

Würth ElektronikIn Stock: 90274457027 Datasheet

Current PartRFQ

P1252.222NL

Pulse ElectronicsIn Stock: 2802P1252.222NL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74457027 is determined by the following critical parameters:

• Inductance Value: Nominal inductance must fall within the ±20% tolerance band (2.16 µH to 3.24 µH for the 2.7 µH specification)
• Current Rating: Minimum continuous current rating must meet or exceed 10 A
• DC Resistance: Lower or equal DCR values are acceptable; higher values may impact thermal performance
• Saturation Current: Must support the application's peak current requirements
• Operating Temperature Range: Must encompass the application's thermal environment
• Mounting Type: Surface mount compatibility is required
• Regulatory Compliance: RoHS3 and REACH compliance status must be maintained

The Pulse Electronics P1252.222NL qualifies as a substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

The Pulse Electronics P1252.222NL is an active product with full ROHS3 and REACH compliance, matching the regulatory status of the primary part. The substitute exhibits superior electrical characteristics: 12 A current rating versus 10 A, and 6.1 mOhm DCR versus 8 mOhm DCR. The operating temperature range extends to 130°C compared to 125°C.

The inductance difference (2.2 µH versus 2.7 µH) represents an 18.5% reduction within the ±20% tolerance specification. Circuit designs must accommodate this inductance variance through simulation or empirical validation to ensure performance margins remain acceptable.

Frequently Asked Questions (FAQ)

Q: Can the P1252.222NL be used as a direct replacement for the 74457027?

A: The P1252.222NL meets the core electrical and mechanical requirements for substitution. However, the 2.2 µH inductance differs from the 2.7 µH specification. Applications with tight inductance tolerances or frequency-dependent performance must be evaluated individually.

Q: What is the impact of the lower DC resistance in the substitute part?

A: Lower DC resistance (6.1 mOhm versus 8 mOhm) reduces resistive losses and heat generation, which is beneficial for thermal performance and efficiency.

Q: Are there package or footprint differences between these parts?

A: Both parts are surface mount with nonstandard packages. The 74457027 measures 22.00mm × 15.00mm × 7.80mm (height). The P1252.222NL measures 22.33mm × 15.14mm × 7.49mm (height). Verify PCB layout compatibility before implementation.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8504.50.4000.

Q: What is the saturation current specification, and why does it matter?

A: Both parts have a saturation current of 20 A. This defines the peak current threshold beyond which inductance degrades significantly. Applications must ensure operating currents remain below this limit.