Würth Elektronik 7445710 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7445710 is a 10 µH unshielded drum core wirewound inductor rated for 6.5 A continuous current with a maximum DC resistance of 21 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is specified for 100 kHz inductance testing. The part is actively manufactured and ROHS3 compliant, making it suitable for modern electronic applications requiring stable inductance performance in power conversion and filtering circuits. Equivalent substitute parts are available from alternative manufacturers to support supply chain flexibility and design optimization.

Substiute Parts

7445710

Würth ElektronikIn Stock: 24357445710 Datasheet

Current PartRFQ

P1252.103NLT

Pulse ElectronicsIn Stock: 1939P1252.103NLT Datasheet

DirectRFQ

SDR2207-100ML

Bourns Inc.In Stock: 2771SDR2207-100ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Würth Elektronik 7445710 is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 10 µH
• Inductance tolerance: ±20%
• Current rating: minimum 6.5 A
• Saturation current: 10 A
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Operating temperature range: minimum -40°C to 125°C
• Inductance test frequency: 100 kHz

Secondary Compatibility Factors:

• DC resistance must not exceed 21 mOhm maximum
• Package dimensions must accommodate 22.00mm x 15.00mm footprint
• RoHS3 compliance required
• MSL rating of 1 or better

Two substitute parts meet these criteria: the Pulse Electronics P1252.103NLT and the Bourns Inc. SDR2207-100ML. Both maintain the specified inductance, tolerance, saturation current, and compliance requirements while operating within the required temperature range.

Parameter Comparison

Engineering Selection Recommendations

Bourns Inc. SDR2207-100ML provides the closest electrical match to the Würth Elektronik 7445710. Both parts share identical inductance, tolerance, current rating, saturation current, and package dimensions. The SDR2207-100ML exhibits superior DC resistance performance at 17.2 mOhm maximum, which is 3.8 mOhm lower than the primary part. The self-resonant frequency of 20 MHz and Q factor of 53 @ 5 MHz are documented for this substitute. All three parts maintain ROHS3 compliance and MSL rating of 1.

Pulse Electronics P1252.103NLT is a functional substitute with the same inductance, tolerance, and saturation current specifications. The continuous current rating is 6 A, which is 0.5 A lower than the primary part. The DC resistance maximum of 26 mOhm exceeds the primary specification by 5 mOhm. The operating temperature range extends to 130°C, providing additional thermal margin. Package dimensions are marginally larger at 22.33mm x 15.14mm x 7.49mm. This part maintains ROHS3 compliance and MSL rating of 1.

Both substitutes are actively manufactured and carry identical compliance certifications. Selection between them depends on application-specific requirements for current capacity and DC resistance performance.

Frequently Asked Questions (FAQ)

Q: Can the Pulse Electronics P1252.103NLT be used in place of the Würth Elektronik 7445710 if the application requires 6.5 A continuous current?

A: The P1252.103NLT is rated for 6 A continuous current, which is 0.5 A below the primary part specification. Applications requiring the full 6.5 A rating should use the Bourns SDR2207-100ML or the original Würth part.

Q: What is the significance of the DC resistance difference between these parts?

A: DC resistance directly affects power dissipation and thermal performance. The Bourns SDR2207-100ML at 17.2 mOhm maximum provides the lowest dissipation, followed by the Würth part at 21 mOhm, and the Pulse part at 26 mOhm. In high-current applications, this difference impacts component temperature rise and circuit efficiency.

Q: Are the package dimensions compatible across all three parts?

A: The Würth 7445710 and Bourns SDR2207-100ML share identical footprints of 22.00mm x 15.00mm. The Pulse P1252.103NLT measures 22.33mm x 15.14mm, which is slightly larger. PCB layout verification is required if switching to the Pulse part.

Q: Do all three parts meet the same compliance requirements?

A: Yes. All three parts are ROHS3 compliant, carry MSL rating of 1 (Unlimited), and are REACH unaffected. All are classified as EAR99 for export control purposes.

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

A: Saturation current (Isat) is specified at 10 A for all three parts. This represents the current level at which the inductor begins to lose inductance due to core saturation. Applications must remain below this threshold to maintain specified inductance performance.

Q: Can these parts be used interchangeably in all circuit applications?

A: Substitution depends on application-specific requirements. The Bourns SDR2207-100ML is the closest electrical match. The Pulse P1252.103NLT is suitable for applications with current requirements at or below 6 A and where the higher DC resistance is acceptable. Verify saturation current, thermal performance, and frequency response requirements for your specific application.