VLS3012ET-470M Equivalent & Substitute Parts

Part Overview

The VLS3012ET-470M is a 47 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 310 mA maximum current with 1.5 Ohm DC resistance. This surface mount component operates across -40°C to 105°C and is ROHS3 compliant. The part is classified as "Not For New Designs," making equivalent and substitute parts necessary for ongoing production and maintenance applications where this inductor specification is required.

Key Parameters

Parameter	Value
Inductance	47 µH
Inductance Tolerance	±20%
Current Rating	310 mA
DC Resistance (DCR)	1.5 Ohm Max
Core Material	Ferrite
Shielding	Shielded
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 105°C
Package	Nonstandard (3.00mm x 3.00mm x 1.20mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the VLS3012ET-470M is determined by the following critical parameters:

Inductance Value: Must be 47 µH
Inductance Tolerance: ±20% or tighter
Current Rating: Minimum 310 mA
DC Resistance: Maximum 1.5 Ohm (preferred) to 1.82 Ohm (acceptable for thermal margin applications)
Core Material: Ferrite shielded construction
Mounting Type: Surface mount
Operating Temperature Range: Must encompass -40°C to 105°C minimum
Compliance: ROHS3 compliant

Parts meeting these criteria are classified as direct substitutes. Parts with higher current ratings or improved DC resistance characteristics are considered upgrades within the same functional category.

Parameter Comparison

Parameter	VLS3012ET-470M (Main)	VLS3012CX-470M-1	BWVF00303012470M00	BWVF00303012470T00	SRU2016-470Y
Manufacturer	TDK Corporation	TDK Corporation	Pulse Electronics	Pulse Electronics	Bourns Inc.
Inductance	47 µH	47 µH	47 µH	47 µH	47 µH
Inductance Tolerance	±20%	±20%	±20%	±30%	±30%
Current Rating (Amps)	310 mA	660 mA	380 mA	380 mA	310 mA
DC Resistance (Ohm)	1.5 Max	1.477 Max	1.82	1.82	1.65 Max
Core Material	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Size	3.00mm x 3.00mm x 1.20mm	3.00mm x 3.00mm x 1.20mm	3.00mm x 3.00mm x 1.20mm	3.00mm x 3.00mm x 1.20mm	2.80mm x 2.80mm x 1.80mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Not For New Designs	Active	Active	Active	Active

Engineering Selection Recommendations

VLS3012CX-470M-1 (TDK Corporation): This part is the preferred direct substitute. It maintains identical inductance, tolerance, and package dimensions while offering superior current rating (660 mA vs. 310 mA) and lower DC resistance (1.477 Ohm vs. 1.5 Ohm). Product status is Active, ensuring long-term availability. Operating temperature range matches the original specification.

BWVF00303012470M00 and BWVF00303012470T00 (Pulse Electronics): These parts provide extended operating temperature range (-55°C to 125°C) and higher current rating (380 mA). DC resistance is 1.82 Ohm, which is acceptable for applications with thermal margin. The tolerance difference (±20% vs. ±30%) should be evaluated against circuit requirements. Both parts are Active status.

SRU2016-470Y (Bourns Inc.): This part meets the core electrical requirements with matching current rating (310 mA) and acceptable DC resistance (1.65 Ohm). Physical dimensions differ slightly (2.80mm x 2.80mm vs. 3.00mm x 3.00mm), requiring PCB layout verification. Product status is Active with extended upper operating temperature (125°C).

Frequently Asked Questions (FAQ)

Q: Can VLS3012CX-470M-1 be used as a direct replacement for VLS3012ET-470M?

A: Yes. Both parts are TDK Corporation 47 µH inductors with identical inductance, tolerance, and package dimensions. VLS3012CX-470M-1 offers higher current rating and lower DC resistance, making it functionally superior for the same application space.

Q: What is the significance of the current rating difference between the main part (310 mA) and substitute parts?

A: Current rating indicates the maximum continuous current the inductor can handle without exceeding saturation. Substitute parts with higher ratings (660 mA for VLS3012CX-470M-1, 380 mA for BWVF series) provide additional thermal margin and are suitable for applications requiring the original 310 mA specification.

Q: Are the Pulse Electronics BWVF parts suitable for applications requiring -40°C to 105°C operation?

A: Yes. The BWVF series operates across -55°C to 125°C, which encompasses the original temperature range. The extended range provides additional design margin for temperature-sensitive applications.

Q: Does the SRU2016-470Y package size difference affect substitution?

A: The SRU2016-470Y has a smaller footprint (2.80mm x 2.80mm vs. 3.00mm x 3.00mm). PCB layout verification is required to confirm pad compatibility and placement feasibility. Height difference (1.80mm vs. 1.20mm) must also be evaluated for clearance constraints.

Q: What tolerance difference should I consider between ±20% and ±30% inductance specifications?

A: Inductance tolerance affects circuit performance in frequency-dependent applications. ±20% tolerance (VLS3012ET-470M, VLS3012CX-470M-1, BWVF00303012470M00) provides tighter control. ±30% tolerance (BWVF00303012470T00, SRU2016-470Y) is acceptable for applications with wider design margins or where inductance variation is compensated by circuit design.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance requirement of the original VLS3012ET-470M.

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