DO5022P-103MLD Equivalent & Substitute Parts

Part Overview

The DO5022P-103MLD is a 10 µH unshielded wirewound inductor manufactured by Coilcraft, rated for 4.3 A continuous current with a maximum DC resistance of 31mOhm. This surface mount component operates across -40°C to 85°C and is currently in active production status. Substitute parts are identified when equivalent inductance values, current ratings, and DC resistance specifications align within acceptable tolerances for the application, enabling design flexibility and supply chain alternatives.

Substiute Parts

DO5022P-103MLD

CoilcraftIn Stock: 2070DO5022P-103MLD Datasheet

Current PartRFQ

74458010

Würth ElektronikIn Stock: 720974458010 Datasheet

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SDR1806-100ML

Bourns Inc.In Stock: 1405SDR1806-100ML Datasheet

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SLF12555T-100M3R4-PF

TDK CorporationIn Stock: 4471SLF12555T-100M3R4-PF Datasheet

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UP3B-100-R

Eaton - Electronics DivisionIn Stock: 1483UP3B-100-R Datasheet

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UP4B-100-R

Eaton - Electronics DivisionIn Stock: 1613UP4B-100-R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DO5022P-103MLD is determined by the following critical parameters:

• Inductance Value: Must be 10 µH with ±20% tolerance
• Current Rating: Minimum 4.3 A continuous current capability
• DC Resistance: Maximum 31 mOhm to maintain equivalent power dissipation characteristics
• Mounting Type: Surface mount configuration required
• Operating Temperature Range: Must support -40°C minimum and 85°C minimum upper limit
• Saturation Current: Must accommodate 10 A saturation specification

Substitute parts are grouped into two categories based on these constraints: direct equivalents meeting all primary electrical specifications, and enhanced-performance alternatives offering improved current handling or reduced DC resistance while maintaining core inductance and temperature range compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Recommended for Drop-In Replacement)

The 74458010 (Würth Elektronik, WE-PD4 series) provides electrical equivalence to the DO5022P-103MLD with identical current rating and DC resistance specifications. This part extends the operating temperature range to 125°C and maintains ROHS3 compliance with MSL 1 rating. The 74458010 is in active production status and suitable for new designs.

The UP3B-100-R (Eaton UNI-PAC™ series) offers improved DC resistance performance at 26 mOhm while maintaining the 4.3 A current rating and -40°C to 85°C operating range. This part is active and ROHS3 compliant, providing lower power dissipation in equivalent applications.

Enhanced Performance Alternatives

The UP4B-100-R (Eaton UNI-PAC™ series) delivers superior current handling at 6.8 A with reduced DC resistance of 15 mOhm, suitable for applications requiring higher current capacity. Operating temperature range matches the original specification at -40°C to 85°C. This part is active and ROHS3 compliant.

The SDR1806-100ML (Bourns SDR1806 series) provides 5.3 A current rating with 25 mOhm DC resistance and extended temperature range to 125°C. This part is active and ROHS3 compliant, offering improved thermal performance.

Not Recommended for New Designs

The SLF12555T-100M3R4-PF (TDK SLF series) is marked "Not For New Designs" and features shielding not present in the original specification. The saturation current of 3.4 A is below the 10 A requirement, limiting its applicability as a substitute.

Frequently Asked Questions (FAQ)

Q: Can the 74458010 replace the DO5022P-103MLD in all applications?

A: Yes, the 74458010 meets or exceeds all primary electrical specifications of the DO5022P-103MLD. Both parts share identical inductance (10 µH), current rating (4.3 A), and DC resistance (31 mOhm max). The 74458010 extends the operating temperature range to 125°C, providing additional thermal margin. Physical dimensions are identical, enabling direct PCB footprint compatibility.

Q: What is the difference between the UP3B-100-R and UP4B-100-R?

A: Both are Eaton UNI-PAC™ series unshielded inductors with 10 µH inductance. The UP3B-100-R matches the original 4.3 A current rating with 26 mOhm DCR, while the UP4B-100-R provides higher current capacity at 6.8 A with lower DCR of 15 mOhm. Select UP3B-100-R for direct replacement or UP4B-100-R when applications require higher current handling capability.

Q: Why is the SLF12555T-100M3R4-PF not recommended?

A: The SLF12555T-100M3R4-PF is designated "Not For New Designs" by TDK. Additionally, its saturation current of 3.4 A falls below the 10 A specification of the original part, and it features shielding not present in the unshielded DO5022P-103MLD. These factors limit its suitability as a direct substitute.

Q: Does the SDR1806-100ML offer advantages over the original part?

A: The SDR1806-100ML provides improved DC resistance at 25 mOhm compared to 31 mOhm, reducing power dissipation. It offers higher current rating at 5.3 A and extends operating temperature to 125°C. Physical dimensions are slightly smaller (18.30mm × 14.00mm vs. 18.54mm × 15.24mm), which may require PCB layout verification. The part is active and ROHS3 compliant.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, except the SLF12555T-100M3R4-PF which is not recommended for new designs. Compliance certifications are consistent across active production alternatives.

Q: What packaging format is used for these inductors?

A: All substitute parts are supplied in Tape & Reel (TR) packaging for automated assembly. The original DO5022P-103MLD packaging format is not specified in the provided data. Verify packaging compatibility with your assembly process requirements.