SPM3012T-2R2M-CA Equivalent & Substitute Parts

Part Overview

The SPM3012T-2R2M-CA is a 2.2 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 2.2 A continuous current with a maximum DC resistance of 115mOhm. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing production and maintenance applications. The part operates across the temperature range of -40°C to 125°C and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substiute Parts

SPM3012T-2R2M-CA

TDK CorporationIn Stock: 1159SPM3012T-2R2M-CA Datasheet

Current PartRFQ

SPM3012T-2R2M-CA02

TDK CorporationIn Stock: 1156SPM3012T-2R2M-CA02 Datasheet

MFR RecommendedRFQ

MDKK3030T2R2MMV

Taiyo YudenIn Stock: 4833MDKK3030T2R2MMV Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SPM3012T-2R2M-CA are qualified based on the following electrical and mechanical parameters:

• Inductance Value: Must be 2.2 µH with ±20% tolerance
• Current Rating: Minimum 2.2 A continuous current capability
• DC Resistance: Maximum 115mOhm to maintain equivalent power dissipation characteristics
• Saturation Current (Isat): Minimum 2.5 A to ensure operational margin
• Shielding: Shielded configuration required
• Core Type: Drum core wirewound construction
• Mounting: Surface mount technology
• Package Footprint: 3.20mm × 3.00mm base dimensions
• Temperature Range: Minimum -40°C to 125°C operating capability
• Compliance: ROHS3 compliant, MSL 1 rating

Two substitute parts meet these criteria with documented compatibility:

1. SPM3012T-2R2M-CA02 (TDK Corporation) — Manufacturer-recommended upgrade with enhanced current rating and reduced DCR
2. MDKK3030T2R2MMV (Taiyo Yuden) — Direct equivalent with automotive-grade qualification (AEC-Q200)

Parameter Comparison

Engineering Selection Recommendations

SPM3012T-2R2M-CA02 is the primary substitute for new designs and production transitions. This part is manufactured by the same supplier (TDK Corporation), maintains identical footprint dimensions (3.20mm × 3.00mm × 1.20mm), and carries active product status. The SPM3012T-2R2M-CA02 provides improved electrical performance with reduced DC resistance (102.3mOhm vs. 115mOhm) and higher saturation current (3.7A vs. 2.5A), offering enhanced operational margin. Both parts are ROHS3 compliant with MSL 1 rating. The operating temperature range of SPM3012T-2R2M-CA02 extends to 105°C, which is acceptable for most applications within the original -40°C to 125°C specification window.

MDKK3030T2R2MMV (Taiyo Yuden) serves as an alternative equivalent for applications requiring automotive-grade qualification (AEC-Q200 certified). This part maintains the same inductance value, current rating, and saturation current as the original SPM3012T-2R2M-CA, with full -40°C to 125°C temperature range coverage. The MDKK3030T2R2MMV has a slightly higher DC resistance (144mOhm vs. 115mOhm) and marginally smaller footprint height (1.00mm vs. 1.20mm). Product status is classified as "Not For New Designs," limiting its use to legacy system maintenance and repair applications.

Frequently Asked Questions (FAQ)

Q: Can SPM3012T-2R2M-CA02 be used as a direct replacement for SPM3012T-2R2M-CA?

A: Yes. Both parts share identical inductance (2.2 µH), tolerance (±20%), current rating (2.2 A minimum), saturation current (≥2.5 A), shielding configuration, core type, mounting method, and package footprint (3.20mm × 3.00mm × 1.20mm). The SPM3012T-2R2M-CA02 offers improved electrical characteristics with lower DC resistance and higher saturation current. The primary consideration is the reduced upper operating temperature limit (105°C vs. 125°C).

Q: What is the difference between the core materials (Iron Powder vs. Metal)?

A: The original SPM3012T-2R2M-CA uses iron powder core material, while both substitutes employ metal core construction. Both core types achieve the specified 2.2 µH inductance value with ±20% tolerance and maintain shielded drum core wirewound configuration. Core material differences do not affect substitution eligibility when electrical parameters remain within specification.

Q: Is MDKK3030T2R2MMV suitable for new product designs?

A: No. MDKK3030T2R2MMV carries "Not For New Designs" product status. This part is appropriate for maintenance, repair, and legacy system applications only. For new designs, SPM3012T-2R2M-CA02 is the recommended substitute.

Q: What is the significance of the AEC-Q200 rating on MDKK3030T2R2MMV?

A: AEC-Q200 is an automotive-grade qualification standard. MDKK3030T2R2MMV meets this certification, making it suitable for automotive and high-reliability applications where such qualification is required. SPM3012T-2R2M-CA and SPM3012T-2R2M-CA02 do not carry this certification.

Q: Are there package compatibility concerns between the three parts?

A: SPM3012T-2R2M-CA and SPM3012T-2R2M-CA02 share identical package dimensions (3.20mm × 3.00mm × 1.20mm) and are fully interchangeable at the PCB level. MDKK3030T2R2MMV has a slightly smaller footprint (3.00mm × 3.00mm × 1.00mm). While the length and width differ by 0.20mm and height by 0.20mm, this part will fit standard 3.20mm × 3.00mm pads with minimal clearance adjustment. Verify PCB layout constraints before substitution.

Q: What is the DC resistance impact on circuit performance?

A: SPM3012T-2R2M-CA specifies 115mOhm maximum DCR. SPM3012T-2R2M-CA02 provides 102.3mOhm (lower), while MDKK3030T2R2MMV specifies 144mOhm (higher). Lower DCR reduces power dissipation and heat generation. Higher DCR increases power loss. Applications sensitive to inductor losses should prioritize SPM3012T-2R2M-CA02. Applications with thermal margin can accommodate MDKK3030T2R2MMV.

Q: Do all three parts meet ROHS3 and MSL requirements?

A: Yes. All three parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special moisture control measures are required during storage, handling, or assembly.