VLF4012ST-2R2M1R3 Equivalent & Substitute Parts

Part Overview

The VLF4012ST-2R2M1R3 is a 2.2 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 1.3 A continuous current with a maximum DC resistance of 120mOhm. This component is classified as obsolete, making substitute parts necessary for new procurement and ongoing production support. The part operates across the industrial temperature range of -40°C to 105°C and is suitable for surface mount applications in compact form factors.

Substiute Parts

VLF4012ST-2R2M1R3

TDK CorporationIn Stock: 985VLF4012ST-2R2M1R3 Datasheet

Current PartRFQ

VLS3012HBX-2R2M

TDK CorporationIn Stock: 2275VLS3012HBX-2R2M Datasheet

MFR RecommendedRFQ

VLS4012ET-2R2M

TDK CorporationIn Stock: 30179VLS4012ET-2R2M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the VLF4012ST-2R2M1R3 is determined by the following critical parameters:

• Inductance Value: Must be 2.2 µH with ±20% tolerance
• Inductance Test Frequency: 1 MHz
• Shielding: Shielded configuration required
• Type: Drum core wirewound construction
• Mounting: Surface mount technology
• Operating Temperature Range: -40°C to 105°C minimum
• Current Rating: Minimum 1.3 A continuous current capability
• DC Resistance: Lower or equivalent DCR values acceptable

The substitute parts identified maintain the core electrical specifications while offering improvements in current handling capacity and reduced DC resistance, making them suitable replacements for the obsolete VLF4012ST-2R2M1R3.

Parameter Comparison

Engineering Selection Recommendations

VLS3012HBX-2R2M is the primary recommended substitute. This part is in active production status and offers superior electrical performance with 3.15 A current rating and 106 mOhm maximum DC resistance. The metal core construction provides enhanced current handling. The smaller footprint (3.00mm x 3.00mm) may require PCB layout verification for space-constrained applications. This part is available in standard Tape & Reel packaging and maintains full REACH compliance.

VLS4012ET-2R2M is an alternative substitute suitable for applications where the larger footprint (4.00mm x 4.00mm) is acceptable. This part provides the lowest DC resistance at 81 mOhm maximum and 1.7 A current rating, matching the saturation current of the original part. However, this part carries a "Not For New Designs" status, limiting its suitability for long-term production programs. Standard Tape & Reel packaging is available.

Both substitute parts maintain the required 2.2 µH inductance value, ±20% tolerance, shielded configuration, and -40°C to 105°C operating temperature range. All three parts are REACH unaffected and MSL 1 rated.

Frequently Asked Questions (FAQ)

Q: Can VLS3012HBX-2R2M be used as a direct replacement for VLF4012ST-2R2M1R3?

A: Yes, with PCB layout verification. Both parts maintain 2.2 µH inductance at ±20% tolerance, shielded drum core construction, and identical operating temperature range. The VLS3012HBX-2R2M has superior current rating (3.15 A vs 1.3 A) and lower DC resistance (106 mOhm vs 120 mOhm). The smaller footprint (3.00mm x 3.00mm vs 3.80mm x 3.60mm) requires confirmation that PCB routing and component placement accommodate the reduced size.

Q: What is the difference between the metal core and ferrite core options?

A: The VLS3012HBX-2R2M uses a metal core material, while the VLF4012ST-2R2M1R3 and VLS4012ET-2R2M use ferrite cores. Both core materials maintain the specified 2.2 µH inductance and shielding characteristics. Metal core construction in the VLS3012HBX-2R2M contributes to its higher current rating and lower DC resistance.

Q: Why is VLS4012ET-2R2M marked "Not For New Designs"?

A: This designation indicates the part is in a mature or transitional phase of its product lifecycle. While electrically suitable as a substitute, TDK recommends prioritizing VLS3012HBX-2R2M for new designs to ensure long-term component availability and supply chain stability.

Q: Are there packaging considerations when switching from VLF4012ST-2R2M1R3 to substitute parts?

A: Yes. The original VLF4012ST-2R2M1R3 uses nonstandard packaging, while both substitute parts are supplied in standard Tape & Reel (TR) format. This improves handling efficiency and reduces procurement complexity. Verify that your assembly equipment is compatible with standard Tape & Reel packaging specifications.

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

A: Yes. All three parts are REACH unaffected, MSL 1 rated (unlimited moisture sensitivity), and operate across -40°C to 105°C. All maintain surface mount configuration and shielded drum core wirewound construction.