SPM4012T-2R2M Equivalent & Substitute Parts

Part Overview

The SPM4012T-2R2M is a 2.2 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 2.9 A continuous current with a maximum DC resistance of 95 mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The SPM4012T-2R2M-LR serves as the manufacturer-recommended successor, offering improved electrical performance within the same physical footprint and package specifications.

Substiute Parts

SPM4012T-2R2M

TDK CorporationIn Stock: 5807SPM4012T-2R2M Datasheet

Current PartRFQ

SPM4012T-2R2M-LR

TDK CorporationIn Stock: 26335SPM4012T-2R2M-LR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPM4012T-2R2M is determined by strict equivalence across the following critical parameters:

• Inductance Value: Must be 2.2 µH with ±20% tolerance
• Core Type & Shielding: Metal shielded drum core construction required
• Mounting & Package: Surface mount, nonstandard package with identical physical dimensions (4.40 mm × 4.10 mm × 1.20 mm)
• Temperature Range: −40°C to +125°C operating specification
• Compliance: ROHS3 compliant, MSL 1 rating
• Test Frequency: 100 kHz inductance measurement standard

The SPM4012T-2R2M-LR qualifies as a direct substitute based on matching all core parameters while offering enhanced electrical performance in current rating and saturation characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SPM4012T-2R2M-LR is the manufacturer-designated replacement for the obsolete SPM4012T-2R2M. Both components maintain identical physical footprints and core electrical specifications, ensuring direct PCB compatibility without layout modifications.

The SPM4012T-2R2M-LR offers measurable improvements: increased current rating (3.1 A vs. 2.9 A), higher saturation current (4.8 A vs. 3.3 A), and reduced DC resistance (85.4 mOhm vs. 95 mOhm). These enhancements provide additional design margin without compromising existing circuit performance.

Both parts maintain ROHS3 compliance and MSL 1 moisture sensitivity ratings, supporting equivalent supply chain and storage requirements. The active product status of the SPM4012T-2R2M-LR ensures long-term availability and procurement stability.

Frequently Asked Questions (FAQ)

Q: Can the SPM4012T-2R2M-LR be used as a direct replacement for the SPM4012T-2R2M?

A: Yes. Both inductors share identical inductance values (2.2 µH), physical dimensions (4.40 mm × 4.10 mm × 1.20 mm), core construction (metal shielded drum core), and operating temperature range (−40°C to +125°C). The SPM4012T-2R2M-LR is the manufacturer-recommended active substitute.

Q: What are the key differences between these two parts?

A: The SPM4012T-2R2M-LR provides improved electrical performance: higher continuous current rating (3.1 A vs. 2.9 A), increased saturation current (4.8 A vs. 3.3 A), and lower DC resistance (85.4 mOhm vs. 95 mOhm). Physical and compliance specifications remain identical.

Q: Are there any PCB layout or mounting considerations when substituting?

A: No. Both parts use surface mount technology with identical package dimensions and nonstandard case specifications. No PCB modifications or requalification is required.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SPM4012T-2R2M and SPM4012T-2R2M-LR are ROHS3 compliant with MSL 1 moisture sensitivity ratings, supporting equivalent environmental and regulatory requirements.

Q: Why is the SPM4012T-2R2M classified as obsolete?

A: The SPM4012T-2R2M has been superseded by the SPM4012T-2R2M-LR in TDK Corporation's active product portfolio. The newer variant offers enhanced performance characteristics while maintaining full backward compatibility.