Würth Elektronik 7440320056 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7440320056 is a 5.6 µH unshielded drum core wirewound inductor rated for 440 mA continuous current with a maximum DC resistance of 360mOhm. This surface mount component operates across the -40°C to 125°C temperature range and is designed for applications requiring stable inductance in compact form factors. The part is active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Substiute Parts

7440320056

Würth ElektronikIn Stock: 11717440320056 Datasheet

Current PartRFQ

SDR0302-5R6ML

Bourns Inc.In Stock: 3284SDR0302-5R6ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7440320056 is determined by the following critical parameters:

• Inductance value must equal 5.6 µH within the ±20% tolerance band
• Current rating must meet or exceed 440 mA continuous operation
• DC resistance must not exceed 360mOhm maximum
• Core material must be ferrite with unshielded configuration
• Operating temperature range must encompass -40°C to 125°C
• Mounting type must be surface mount compatible
• RoHS3 compliance and REACH unaffected status required

The Bourns SDR0302-5R6ML satisfies these substitution criteria through equivalent inductance, superior current handling (1.1 A rating), lower DC resistance (160mOhm), matching temperature range, and identical compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 7440320056 and Bourns SDR0302-5R6ML are active production components with ROHS3 compliance and REACH unaffected status. The Bourns substitute provides enhanced electrical performance through higher current rating and lower DC resistance while maintaining identical inductance and temperature specifications. Selection between these parts should be based on availability, lead time, and cost considerations, as electrical and compliance requirements are satisfied by both options.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR0302-5R6ML directly replace the Würth 7440320056 in existing designs?

A: Yes. Both parts share identical inductance (5.6 µH ±20%), matching operating temperature range (-40 to 125°C), equivalent core material (ferrite, unshielded), and surface mount configuration. The Bourns part exceeds the current and saturation specifications of the original design.

Q: What are the physical dimension differences between these parts?

A: The Würth 7440320056 measures 3.20mm L × 2.50mm W × 2.30mm H (seated). The Bourns SDR0302-5R6ML measures 3.00mm L × 2.80mm W × 2.80mm H (seated). PCB layout verification is required to confirm mechanical fit in space-constrained applications.

Q: Are there compliance or certification differences?

A: No. Both parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (unlimited) for both components.

Q: Why does the Bourns part have lower DC resistance?

A: Lower DC resistance (160mOhm vs. 360mOhm) is an inherent design characteristic of the Bourns SDR0302 series and represents improved electrical performance. This reduces power dissipation in the inductor during operation.

Q: What is the inductance tolerance for both parts?

A: Both the Würth 7440320056 and Bourns SDR0302-5R6ML specify ±20% inductance tolerance at their respective test frequencies (1 MHz and 1 kHz).