744775233 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744775233 is a 330 µH unshielded drum core wirewound inductor rated for 430 mA continuous current with a maximum DC resistance of 1.26Ohm. This component is part of the WE-PD2 series and is actively manufactured. Equivalent parts are identified when they maintain the same inductance value, tolerance, core material, shielding configuration, and operating temperature range while meeting or exceeding the electrical performance requirements of the original specification.

Substiute Parts

744775233

Würth ElektronikIn Stock: 1477744775233 Datasheet

Current PartRFQ

SDR0805-331KL

Bourns Inc.In Stock: 52250SDR0805-331KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Bourns Inc. SDR0805-331KL qualifies as a direct substitute based on the following alignment of critical parameters:

• Inductance value: 330 µH (identical)
• Tolerance: ±10% (identical)
• DC Resistance: 1.26Ohm Max (identical)
• Core material: Ferrite (identical)
• Shielding configuration: Unshielded (identical)
• Operating temperature range: -40°C ~ 125°C (identical)
• Mounting type: Surface Mount (identical)
• RoHS3 compliance: Confirmed for both parts

The substitute part maintains electrical equivalence within the specified parameter set. Current rating differences (430 mA vs. 400 mA) and saturation current variations are secondary characteristics that do not prevent substitution when the application current requirement does not exceed 400 mA.

Parameter Comparison

Engineering Selection Recommendations

Both the 744775233 and SDR0805-331KL are active products with ROHS3 compliance and MSL Level 1 rating. Selection between these parts depends on application current requirements and PCB layout constraints. The 744775233 supports 430 mA continuous current, while the SDR0805-331KL is rated for 400 mA. Applications requiring current above 400 mA must use the original 744775233. For applications operating at or below 400 mA, the SDR0805-331KL provides equivalent electrical performance. Dimensional differences in width (7.00mm vs. 7.80mm) and height (5.50mm vs. 5.30mm) must be verified against PCB layout requirements.

Frequently Asked Questions (FAQ)

Q: Can SDR0805-331KL replace 744775233 in all applications?

A: Substitution is valid only when the application current requirement does not exceed 400 mA. The 744775233 supports 430 mA continuous current, while the SDR0805-331KL is rated for 400 mA. Both parts maintain identical inductance, tolerance, DC resistance, and operating temperature specifications.

Q: Are there physical mounting differences between these parts?

A: Both parts are surface mount inductors with similar heights (5.50mm vs. 5.30mm). Width dimensions differ slightly (7.00mm vs. 7.80mm). PCB footprint and layout clearances must be verified before substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both 744775233 and SDR0805-331KL are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating. REACH status is unaffected for both parts.

Q: What is the significance of the saturation current difference?

A: The SDR0805-331KL has a higher saturation current (580 mA vs. 480 mA). This does not affect substitution validity but indicates the substitute part maintains inductance over a wider current range. For applications operating below 400 mA, this difference is not a limiting factor.

Q: How do the self-resonant frequencies compare?

A: The 744775233 has a self-resonant frequency of 4.2 MHz, while the SDR0805-331KL is 4 MHz. Both values are within typical operating ranges for 330 µH inductors and do not prevent substitution for standard filtering and energy storage applications.