744775127 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744775127 is a 27 µH unshielded drum core wirewound inductor rated for 1.48 A continuous current with a maximum DC resistance of 120 mOhm. This component is part of the WE-PD2 series and is actively manufactured. Equivalent and substitute parts are identified when applications require alternative sourcing, inventory availability, or when design flexibility permits component interchange within specified electrical and mechanical tolerances.

Substiute Parts

744775127

Würth ElektronikIn Stock: 2179744775127 Datasheet

Current PartRFQ

SDR0805-270KL

Bourns Inc.In Stock: 7388SDR0805-270KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 744775127 with the Bourns SDR0805-270KL is permissible based on the following alignment of critical electrical and mechanical parameters:

• Inductance Value: Both parts specify 27 µH with ±10% tolerance
• DC Resistance: Both parts maintain 120 mOhm maximum DC resistance
• Core Type: Both utilize ferrite drum core construction
• Shielding Configuration: Both are unshielded designs
• Operating Temperature: Both rated -40°C to 125°C
• Mounting: Both are surface mount components
• Compliance: Both are ROHS3 compliant and REACH unaffected

The substitute part exhibits a lower continuous current rating (1.3 A versus 1.48 A) and different saturation current (2.1 A versus 1.62 A). These differences require verification that the application's maximum current demand does not exceed 1.3 A continuous operation.

Parameter Comparison

Engineering Selection Recommendations

Both the 744775127 and SDR0805-270KL are active products with ROHS3 compliance and unlimited moisture sensitivity ratings. Selection between these components should be based on application current requirements. The 744775127 supports continuous operation at 1.48 A, while the SDR0805-270KL is rated for 1.3 A continuous current. Applications operating below 1.3 A continuous current may use either component. Applications requiring continuous current between 1.3 A and 1.48 A must use the 744775127. Both components maintain identical inductance values, DC resistance specifications, and operating temperature ranges, ensuring functional equivalence within their respective current ratings.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-270KL replace the 744775127 in all applications?

A: Substitution is valid only when the application's continuous current requirement does not exceed 1.3 A. The SDR0805-270KL has a lower continuous current rating (1.3 A) compared to the 744775127 (1.48 A). Applications requiring continuous currents between 1.3 A and 1.48 A must use the original 744775127.

Q: Are the physical dimensions compatible between these two parts?

A: Both components are surface mount inductors with nonstandard package dimensions. The 744775127 measures 7.80 mm × 7.00 mm with a maximum seated height of 5.50 mm. The SDR0805-270KL measures 7.80 mm × 7.80 mm with a maximum seated height of 5.30 mm. PCB layout verification is required to confirm mechanical fit.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 744775127 and SDR0805-270KL are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Both carry MSL rating 1 (unlimited moisture sensitivity).

Q: What is the difference in saturation current between these parts?

A: The 744775127 has a saturation current of 1.62 A, while the SDR0805-270KL has a saturation current of 2.1 A. Saturation current represents the point at which inductance begins to degrade. Applications with transient current spikes should account for these different saturation thresholds.

Q: Are the DC resistance values identical?

A: Yes. Both parts specify a maximum DC resistance of 120 mOhm, ensuring equivalent power dissipation characteristics at rated currents.