VLS252012T-3R3MR99 Equivalent & Substitute Parts

Part Overview

The VLS252012T-3R3MR99 is a 3.3 µH shielded wirewound inductor manufactured by TDK Corporation, rated for 1 A continuous current with a maximum DC resistance of 272 mOhm. This component is designed for surface mount applications in the 1008 (2520 Metric) package format. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing production and design requirements.

Substiute Parts

VLS252012T-3R3MR99

TDK CorporationIn Stock: 19423VLS252012T-3R3MR99 Datasheet

Current PartRFQ

VLS252010CX-3R3M-1

TDK CorporationIn Stock: 6103VLS252010CX-3R3M-1 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VLS252012T-3R3MR99 is determined by the following critical parameters:

• Inductance Value: Must be 3.3 µH with ±20% tolerance
• Shielding Type: Must be shielded construction
• Mounting Configuration: Must be surface mount compatible
• Package Footprint: Must accommodate 1008 (2520 Metric) or equivalent physical dimensions (2.50mm x 2.00mm x 1.00mm max height)
• Operating Temperature Range: Must support -40°C ~ 105°C minimum
• RoHS Compliance: Must maintain ROHS3 compliance status
• Moisture Sensitivity: Must be MSL 1 or better

The substitute part VLS252010CX-3R3M-1 meets all substitution criteria while offering improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The VLS252010CX-3R3M-1 is the qualified substitute for the obsolete VLS252012T-3R3MR99. Selection is supported by the following factors:

• Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: Both parts maintain ROHS3 compliance and equivalent moisture sensitivity ratings, satisfying environmental and reliability requirements.
• Electrical Performance: The substitute delivers improved DC resistance (186 mOhm vs. 272 mOhm) and higher continuous current rating (1.25 A vs. 1 A), providing enhanced thermal performance and reduced power dissipation in equivalent applications.
• Physical Compatibility: Identical footprint and height specifications ensure direct PCB layout compatibility without redesign.
• Core Construction: The substitute employs drum core ferrite construction, which is a standard evolution in shielded inductor design for this inductance and current rating class.

Frequently Asked Questions (FAQ)

Q: Can VLS252010CX-3R3M-1 be used as a direct replacement for VLS252012T-3R3MR99?

A: Yes. Both parts share identical inductance values, tolerance, shielding type, operating temperature range, physical dimensions, and compliance certifications. The substitute offers superior electrical characteristics with lower DC resistance and higher current rating.

Q: What is the difference in DC resistance between these parts?

A: The main part has a maximum DC resistance of 272 mOhm, while the substitute is rated at 186 mOhm maximum. Lower DC resistance reduces I²R losses and heat generation in the inductor during operation.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 1008 (2520 Metric) package with identical physical dimensions of 2.50mm length, 2.00mm width, and 1.00mm maximum seated height. No PCB layout modifications are required.

Q: What is the saturation current difference?

A: The main part has an Isat of 1.4 A, while the substitute is rated at 1.3 A. Both exceed the continuous current rating of their respective parts, maintaining adequate saturation margin for the specified operating conditions.

Q: Does the substitute maintain RoHS compliance?

A: Yes. The VLS252010CX-3R3M-1 is ROHS3 compliant with MSL 1 rating, matching the environmental and reliability certifications of the original part.

Q: Why is the main part classified as obsolete?

A: Product obsolescence reflects TDK Corporation's manufacturing lifecycle decisions. The substitute represents the current production equivalent for this inductance and current rating class.