VLF5014ST-3R3M2R0 Equivalent & Substitute Parts

Part Overview

The VLF5014ST-3R3M2R0 is a 3.3 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 2 A continuous current with a maximum DC resistance of 100 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across the temperature range of -40°C to 105°C and is suitable for surface mount applications in compact form factors.

Key Parameters

Parameter	Value
Inductance	3.3 µH
Inductance Tolerance	±20%
Current Rating	2 A
Current - Saturation (Isat)	2.3 A
DC Resistance (DCR)	100 mOhm Max
Core Material	Ferrite
Shielding	Shielded
Mounting Type	Surface Mount
Operating Temperature	-40°C to 105°C
Size	4.70 mm × 4.50 mm × 1.40 mm
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the VLF5014ST-3R3M2R0 is determined by the following critical parameters:

Inductance Value: Must be 3.3 µH with tolerance compatibility
Current Rating: Must support minimum 2 A continuous current
DC Resistance: Lower or equivalent DCR values are acceptable
Core Type & Shielding: Shielded drum core construction required
Mounting Type: Surface mount configuration mandatory
Operating Temperature Range: Must cover or exceed -40°C to 105°C
Package Compatibility: Physical dimensions and form factor must accommodate existing PCB layouts

All substitute parts listed below meet these core electrical and mechanical requirements while maintaining functional equivalence for the intended application.

Parameter Comparison

Parameter	VLF5014ST-3R3M2R0	VLS3012HBX-3R3M	74408942033	SRR4018-3R3Y
Manufacturer	TDK Corporation	TDK Corporation	Würth Elektronik	Bourns Inc.
Inductance	3.3 µH	3.3 µH	3.3 µH	3.3 µH
Inductance Tolerance	±20%	±20%	±20%	±30%
Current Rating (Amps)	2 A	2.63 A	2.1 A	1.95 A
Current - Saturation (Isat)	2.3 A	2.82 A	4.6 A	1.8 A
DC Resistance (DCR)	100 mOhm Max	150 mOhm Max	57 mOhm Max	65 mOhm Max
Core Material	Ferrite	Metal	Ferrite	Ferrite
Shielding	Shielded	Shielded	Shielded	Shielded
Operating Temperature	-40°C to 105°C	-40°C to 105°C	-40°C to 125°C	-40°C to 125°C
Size (mm)	4.70 × 4.50 × 1.40	3.00 × 3.00 × 1.20	4.80 × 4.80 × 3.00	4.80 × 4.80 × 2.00
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

VLS3012HBX-3R3M (TDK Corporation): This part is the manufacturer-recommended substitute from TDK. It maintains the same inductance value and tolerance, offers improved current rating (2.63 A vs. 2 A), and is ROHS3 compliant with active product status. The primary trade-off is increased DCR (150 mOhm vs. 100 mOhm) and a smaller physical footprint (3.00 × 3.00 mm), which may require PCB layout verification. Core material differs (metal vs. ferrite), affecting electromagnetic characteristics.

74408942033 (Würth Elektronik): This WE-SPC series inductor provides the lowest DC resistance (57 mOhm) among all substitutes, supporting 2.1 A continuous current. It features ROHS3 compliance, extended operating temperature range (-40°C to 125°C), and active product status. Physical dimensions (4.80 × 4.80 mm) are comparable to the original part. The ferrite core maintains similar electromagnetic behavior to the VLF5014ST-3R3M2R0.

SRR4018-3R3Y (Bourns Inc.): This Bourns SRR4018 series part meets the 2 A current requirement with 1.95 A rating and provides 65 mOhm DCR. It is ROHS3 compliant with active status and extended temperature range (-40°C to 125°C). The inductance tolerance is wider (±30% vs. ±20%), and saturation current is lower (1.8 A). Physical dimensions (4.80 × 4.80 mm) are similar to the original.

Frequently Asked Questions (FAQ)

Q: Can VLS3012HBX-3R3M be used as a direct replacement despite the smaller package size?

A: VLS3012HBX-3R3M meets all electrical requirements but has a significantly smaller footprint (3.00 × 3.00 mm vs. 4.70 × 4.50 mm). Direct substitution requires PCB layout verification to confirm that the reduced size does not conflict with existing component placement or thermal management requirements.

Q: Why does 74408942033 have lower DC resistance than the original part?

A: Lower DC resistance is an acceptable substitution parameter. The 74408942033 exhibits 57 mOhm DCR compared to the original 100 mOhm maximum, resulting in reduced power dissipation and improved efficiency. This represents a performance improvement rather than a limitation.

Q: Is the metal core in VLS3012HBX-3R3M compatible with ferrite core applications?

A: Both metal and ferrite cores are acceptable for shielded drum core inductors at 3.3 µH. The core material difference affects electromagnetic characteristics such as saturation behavior and frequency response. Application-specific testing may be required if the design is sensitive to these parameters.

Q: What is the impact of the ±30% tolerance in SRR4018-3R3Y versus ±20% in the original part?

A: The wider tolerance in SRR4018-3R3Y (±30%) allows for greater inductance variation across the production range. Applications requiring tighter inductance control should prioritize 74408942033 or VLS3012HBX-3R3M, both of which maintain ±20% tolerance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. VLS3012HBX-3R3M, 74408942033, and SRR4018-3R3Y are all ROHS3 compliant. The original VLF5014ST-3R3M2R0 does not specify RoHS status due to its obsolete classification.

Q: Which substitute offers the best thermal performance?

A: 74408942033 provides the lowest DC resistance (57 mOhm), resulting in the lowest resistive heating at rated current. This translates to superior thermal performance compared to alternatives with higher DCR values.

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