VLF403215MT-2R2M Equivalent & Substitute Parts

Part Overview

The VLF403215MT-2R2M is a 2.2 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 3.14 A continuous current with a maximum DC resistance of 43mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. 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.

Key Parameters

Parameter	Value
Inductance	2.2 µH
Tolerance	±20%
Current Rating	3.14 A
DC Resistance (DCR)	43mOhm Max
Saturation Current (Isat)	2.03 A
Core Material	Ferrite
Shielding	Shielded
Operating Temperature	-40°C ~ 105°C
Mounting Type	Surface Mount
Package Size	4.00mm x 3.20mm x 1.50mm
Inductance Test Frequency	1 MHz

Substitute Part Grouping Explanation

Substitution eligibility for the VLF403215MT-2R2M is determined by the following critical parameters:

Inductance value: 2.2 µH (exact match required)
Inductance tolerance: ±20% (must be equivalent or tighter)
Current rating: minimum 3.14 A continuous
DC resistance: must not exceed 43mOhm to maintain thermal and efficiency characteristics
Shielding: shielded configuration required
Core type: ferrite or metal core acceptable for equivalent performance
Operating temperature range: -40°C to 105°C minimum
Mounting type: surface mount only
Package classification: nonstandard form factor

The VLS3012HBX-2R2M qualifies as a manufacturer-recommended substitute based on matching inductance, tolerance, current rating capability, shielding, temperature range, and surface mount configuration. While the substitute exhibits higher DC resistance (106mOhm vs. 43mOhm) and different core material (metal vs. ferrite), it maintains functional equivalence within the specified electrical parameters for this product category.

Parameter Comparison

Parameter	VLF403215MT-2R2M (Main)	VLS3012HBX-2R2M (Substitute)
Manufacturer	TDK Corporation	TDK Corporation
Inductance	2.2 µH	2.2 µH
Tolerance	±20%	±20%
Current Rating (Amps)	3.14 A	3.15 A
Saturation Current (Isat)	2.03 A	3.35 A
DC Resistance (DCR)	43mOhm Max	106mOhm Max
Core Material	Ferrite	Metal
Shielding	Shielded	Shielded
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C
Mounting Type	Surface Mount	Surface Mount
Package Size (L x W x H)	4.00mm x 3.20mm x 1.50mm	3.00mm x 3.00mm x 1.20mm
Inductance Test Frequency	1 MHz	1 MHz
Product Status	Obsolete	Active
Packaging	Nonstandard	Tape & Reel (TR)
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99

Engineering Selection Recommendations

The VLS3012HBX-2R2M is the manufacturer-recommended equivalent for the obsolete VLF403215MT-2R2M. Selection of this substitute is supported by the following factors:

Active product status ensures long-term availability and supply chain continuity
Identical inductance value and tolerance maintain circuit performance specifications
Equivalent current rating and superior saturation current provide operational headroom
Shielded configuration preserves electromagnetic compatibility characteristics
Matching operating temperature range supports thermal design requirements
REACH Unaffected and EAR99 classification maintain regulatory compliance
Tape & Reel packaging supports automated assembly processes
Smaller physical footprint (3.00mm x 3.00mm vs. 4.00mm x 3.20mm) enables space optimization in PCB layouts

The increased DC resistance of the substitute (106mOhm vs. 43mOhm) must be evaluated within the context of the specific application's thermal and efficiency requirements.

Frequently Asked Questions (FAQ)

Q: Can the VLS3012HBX-2R2M be used as a direct replacement for the VLF403215MT-2R2M?

A: Yes, the VLS3012HBX-2R2M is the manufacturer-recommended substitute. Both parts share identical inductance values, tolerance, current ratings, shielding, and operating temperature ranges. The substitute is an active product with established supply availability.

Q: What is the significance of the different DC resistance values?

A: The VLS3012HBX-2R2M exhibits higher DC resistance (106mOhm vs. 43mOhm). This parameter affects power dissipation and thermal performance. Applications with stringent thermal budgets or high continuous current operation must account for increased resistive losses in the substitute part.

Q: Why is the package size different between the two parts?

A: The VLS3012HBX-2R2M uses a smaller nonstandard form factor (3.00mm x 3.00mm x 1.20mm) compared to the VLF403215MT-2R2M (4.00mm x 3.20mm x 1.50mm). PCB layout verification is required to confirm physical compatibility, though the reduced footprint typically enables design optimization.

Q: Are there compliance or regulatory differences between these parts?

A: Both parts maintain identical REACH and ECCN classifications (REACH Unaffected, EAR99). The substitute achieves RoHS3 compliance, whereas the main part status is not specified. Both parts carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What is the difference between ferrite and metal core materials in these inductors?

A: The VLF403215MT-2R2M uses ferrite core material, while the VLS3012HBX-2R2M uses metal core material. Both configurations provide shielding and operate across the same frequency and temperature ranges. Core material selection affects saturation characteristics and DC resistance, with the metal core substitute demonstrating higher saturation current (3.35 A vs. 2.03 A).

Q: How does packaging format affect component procurement?

A: The VLF403215MT-2R2M uses nonstandard packaging, while the VLS3012HBX-2R2M is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes and typically offers improved supply chain efficiency and cost structure for production volumes.

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