SPM4020T-2R2M Equivalent & Substitute Parts

Part Overview

The SPM4020T-2R2M is a 2.2 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 3.7 A continuous current with a maximum DC resistance of 70.4 mOhm. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The SPM4020T-2R2M-LR serves as the manufacturer-recommended upgrade path, offering improved electrical performance within the same physical footprint and package specifications.

Substiute Parts

SPM4020T-2R2M

TDK CorporationIn Stock: 2435SPM4020T-2R2M Datasheet

Current PartRFQ

SPM4020T-2R2M-LR

TDK CorporationIn Stock: 15526SPM4020T-2R2M-LR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPM4020T-2R2M is determined by the following critical parameters:

• Inductance Value: Must be 2.2 µH with ±20% tolerance
• Core Type & Shielding: Shielded drum core wirewound construction required
• Mounting Type: Surface mount configuration mandatory
• Physical Footprint: Package dimensions 4.40mm x 4.10mm x 2.00mm maximum
• Operating Temperature: -40°C to 125°C range
• Compliance Standards: ROHS3 compliant, REACH unaffected

The SPM4020T-2R2M-LR qualifies as a direct substitute because it maintains identical inductance, tolerance, core type, shielding, mounting method, physical dimensions, temperature range, and compliance certifications. The substitute part offers enhanced electrical performance through improved current rating and reduced DC resistance.

Parameter Comparison

Engineering Selection Recommendations

The SPM4020T-2R2M-LR is the appropriate selection for applications currently using or specifying the SPM4020T-2R2M. The substitute part maintains full electrical and mechanical compatibility while offering superior performance characteristics. The active product status of the SPM4020T-2R2M-LR ensures long-term availability and supply chain continuity. Both parts maintain identical ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and production transitions.

Frequently Asked Questions (FAQ)

Q: Can the SPM4020T-2R2M-LR be used as a direct replacement for the SPM4020T-2R2M?

A: Yes. Both parts share identical inductance values, tolerances, core types, shielding configurations, mounting methods, physical dimensions, and operating temperature ranges. The substitute part is electrically and mechanically compatible.

Q: What are the performance differences between these parts?

A: The SPM4020T-2R2M-LR provides higher current rating (4.4 A versus 3.7 A), higher saturation current (5.3 A versus 3.8 A), and lower DC resistance (61.6 mOhm versus 70.4 mOhm). These improvements reduce thermal dissipation and allow operation at higher current levels within the same package.

Q: Are there any package or footprint differences?

A: No. Both parts use identical surface mount package dimensions of 4.40mm length, 4.10mm width, and 2.00mm maximum height. PCB layouts and assembly processes require no modification.

Q: Do compliance certifications differ between these parts?

A: No. Both parts are ROHS3 compliant and REACH unaffected. Regulatory requirements are satisfied by either part.

Q: Why is the original part obsolete?

A: The SPM4020T-2R2M has been superseded by the SPM4020T-2R2M-LR, which offers improved electrical performance. TDK Corporation recommends the newer part for all new designs and production applications.