VLS3012T-100MR72 Equivalent & Substitute Parts

Part Overview

The VLS3012T-100MR72 is a 10 µH shielded wirewound inductor manufactured by TDK Corporation, rated for 720 mA continuous current with a maximum DC resistance of 336 mOhm. This component is classified as obsolete, necessitating identification of equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility across inductance value, current rating, DC resistance, and physical dimensions while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value
Inductance	10 µH
Tolerance	±20%
Current Rating	720 mA
DC Resistance (Max)	336 mOhm
Shielding	Shielded
Package Type	Nonstandard (3.00mm x 3.00mm x 1.20mm)
Operating Temperature Range	-40°C ~ 105°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the VLS3012T-100MR72 is determined by the following critical parameters:

Mandatory Matching Criteria:

Inductance value: 10 µH (±20% tolerance)
Physical dimensions: 3.00mm L x 3.00mm W x 1.20mm H (maximum seated height)
Mounting type: Surface Mount
Shielding: Shielded construction
Operating temperature range: -40°C ~ 105°C minimum
RoHS3 compliance

Allowable Variation Criteria:

Current rating: Must equal or exceed 720 mA
DC resistance: Must not exceed 336 mOhm maximum
Core material: Wirewound or drum core wirewound acceptable
Packaging format: Tape & Reel or bulk acceptable for equivalent function

The two identified substitute parts meet these criteria with variations in current saturation ratings and product lifecycle status.

Parameter Comparison

Parameter	VLS3012T-100MR72	VLS3012CX-100M-1	VLS3012ET-100M-CA
Manufacturer	TDK Corporation	TDK Corporation	TDK Corporation
Inductance	10 µH	10 µH	10 µH
Tolerance	±20%	±20%	±20%
Current Rating (Amps)	720 mA	1.25 A	890 mA
Current - Saturation (Isat)	720 mA	1 A	640 mA
DC Resistance (Max)	336 mOhm	324 mOhm	336 mOhm
Shielding	Shielded	Shielded	Shielded
Type	Wirewound	Drum Core, Wirewound	Drum Core, Wirewound
Size / Dimension	3.00mm x 3.00mm	3.00mm x 3.00mm	3.00mm x 3.00mm
Height - Seated (Max)	1.20mm	1.20mm	1.20mm
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Not For New Designs
Packaging	-	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

VLS3012CX-100M-1 (Primary Substitute): This part is the preferred substitute for the obsolete VLS3012T-100MR72. It maintains identical inductance, tolerance, physical dimensions, and operating temperature range. The current rating of 1.25 A exceeds the original 720 mA requirement, providing design margin. DC resistance of 324 mOhm is superior to the 336 mOhm maximum of the original part. Product status is Active, ensuring long-term availability and supply chain stability. RoHS3 compliance and Tape & Reel packaging support modern manufacturing processes.

VLS3012ET-100M-CA (Secondary Substitute): This part meets all critical electrical and mechanical parameters with current rating of 890 mA and DC resistance matching the original specification at 336 mOhm maximum. However, product status is classified as Not For New Designs, limiting its suitability for new development. Current saturation rating of 640 mA is lower than the original 720 mA specification. This part is acceptable for legacy system maintenance where supply of the original part is unavailable, but should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can VLS3012CX-100M-1 be used as a direct replacement for VLS3012T-100MR72?

A: Yes. Both parts share identical inductance (10 µH), tolerance (±20%), physical dimensions (3.00mm x 3.00mm x 1.20mm), operating temperature range (-40°C ~ 105°C), and shielding characteristics. The VLS3012CX-100M-1 has higher current rating (1.25 A vs. 720 mA) and lower DC resistance (324 mOhm vs. 336 mOhm), making it electrically compatible and functionally superior.

Q: What is the difference between wirewound and drum core wirewound construction?

A: Both are wirewound inductors. The VLS3012T-100MR72 uses standard wirewound construction, while the substitute parts use drum core wirewound construction with ferrite core material. Both configurations maintain the specified electrical characteristics and physical dimensions required for this application.

Q: Why is VLS3012ET-100M-CA marked as Not For New Designs?

A: This designation indicates the manufacturer is phasing out this product line. While it meets the electrical specifications for the original part, it should only be used for maintaining existing systems where the original part is no longer available. New designs should use VLS3012CX-100M-1, which has Active product status.

Q: Are there packaging differences between the main part and substitutes?

A: The original VLS3012T-100MR72 packaging format is not specified in the data. Both substitute parts are supplied in Tape & Reel (TR) format, which is standard for surface mount production. This packaging format is compatible with automated assembly equipment.

Q: Do all three parts meet RoHS3 compliance?

A: Yes. The VLS3012T-100MR72, VLS3012CX-100M-1, and VLS3012ET-100M-CA are all ROHS3 Compliant, meeting environmental and hazardous substance restrictions for electronic components.

Q: What is the saturation current specification and why does it vary?

A: Saturation current (Isat) indicates the current level at which the inductor begins to lose inductance due to core saturation. The original part specifies 720 mA saturation current. VLS3012CX-100M-1 has 1 A saturation current, and VLS3012ET-100M-CA has 640 mA. For applications operating at or near 720 mA, VLS3012CX-100M-1 provides greater design margin.

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