VLS252010T-3R3M Equivalent & Substitute Parts

Part Overview

The VLS252010T-3R3M is a 3.3 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 940 mA continuous current with a maximum DC resistance of 304mOhm. This component is classified as obsolete, making equivalent and 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 RoHS3 compliant with MSL 1 rating.

Key Parameters

Parameter	Value
Inductance	3.3 µH
Tolerance	±20%
Current Rating	940 mA
DC Resistance (DCR)	304mOhm Max
Core Material	Ferrite
Shielding	Shielded
Package	1008 (2520 Metric)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 105°C
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the VLS252010T-3R3M is determined by the following critical parameters:

Inductance value of 3.3 µH with ±20% tolerance
Shielded construction to maintain electromagnetic isolation
Surface mount configuration compatible with 1008 (2520 Metric) or equivalent footprint dimensions
Current rating equal to or exceeding 940 mA
DC resistance within acceptable limits for the application
Operating temperature range covering -40°C to 105°C minimum
RoHS3 compliance and MSL 1 rating

Three substitute parts meet these criteria with varying performance characteristics and core material compositions.

Parameter Comparison

Parameter	VLS252010T-3R3M	VLS252010CX-3R3M-1	PA4335.332NLT	74438323033
Manufacturer	TDK Corporation	TDK Corporation	Pulse Electronics	Würth Elektronik
Inductance	3.3 µH	3.3 µH	3.3 µH	3.3 µH
Tolerance	±20%	±20%	±20%	±20%
Current Rating	940 mA	1.25 A	1.7 A	1.25 A
Current - Saturation	1 A	1.3 A	1.7 A	2.1 A
DC Resistance (DCR)	304mOhm Max	186mOhm Max	163mOhm Max	264mOhm Max
Core Material	Ferrite	Ferrite	Iron	Metal Composite
Shielding	Shielded	Shielded	Shielded	Shielded
Type	Drum Core, Wirewound	Drum Core, Wirewound	Drum Core, Wirewound	Molded
Package / Case	1008 (2520 Metric)	Nonstandard	Nonstandard	1008 (2520 Metric)
Size / Dimension	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.106" L x 0.087" W (2.70mm x 2.20mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)
Height - Seated (Max)	0.039" (1.00mm)	0.039" (1.00mm)	0.047" (1.20mm)	0.039" (1.00mm)
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 125°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All three substitute parts are active products with RoHS3 compliance and MSL 1 ratings, providing long-term availability and regulatory compliance advantages over the obsolete VLS252010T-3R3M.

VLS252010CX-3R3M-1 is the manufacturer-recommended substitute from TDK Corporation, maintaining identical core material (ferrite), construction type (drum core wirewound), and physical dimensions. This part offers improved current handling at 1.25 A with reduced DC resistance of 186mOhm, operating within the same temperature range as the original.

PA4335.332NLT from Pulse Electronics provides the highest current rating at 1.7 A and lowest DC resistance at 163mOhm, with extended operating temperature to 125°C. The iron core material and slightly larger footprint (2.70mm x 2.20mm) represent design trade-offs for superior electrical performance.

74438323033 from Würth Elektronik maintains the standard 1008 (2520 Metric) package and identical physical dimensions. The metal composite core construction delivers the highest saturation current at 2.1 A and extended temperature range to 125°C, with AEC-Q200 automotive qualification available.

Frequently Asked Questions (FAQ)

Q: Can VLS252010CX-3R3M-1 be used as a direct replacement for VLS252010T-3R3M?

A: Yes. Both parts share identical inductance (3.3 µH), tolerance (±20%), core material (ferrite), shielding, and physical dimensions (2.50mm x 2.00mm x 1.00mm). The substitute offers superior current handling (1.25 A vs 940 mA) and lower DC resistance (186mOhm vs 304mOhm), making it functionally compatible for applications within the original current specification.

Q: What are the footprint considerations when substituting PA4335.332NLT?

A: PA4335.332NLT has a larger footprint (2.70mm x 2.20mm x 1.20mm) compared to the original (2.50mm x 2.00mm x 1.00mm). PCB layout verification is required to confirm clearance and trace routing compatibility before implementation.

Q: Does 74438323033 require any design validation?

A: 74438323033 maintains the standard 1008 (2520 Metric) package with identical dimensions to the original part. The metal composite core material differs from the ferrite core in VLS252010T-3R3M, which may affect frequency response characteristics. Electrical performance validation is recommended for applications with specific frequency-dependent requirements.

Q: Are all substitute parts suitable for -40°C to 105°C operation?

A: Yes. All three substitutes support the original operating temperature range of -40°C to 105°C. VLS252010CX-3R3M-1 matches this range exactly, while PA4335.332NLT and 74438323033 extend to 125°C, providing additional thermal margin.

Q: What is the impact of DC resistance differences on circuit performance?

A: The original part specifies 304mOhm maximum DCR. Substitutes offer lower resistance: VLS252010CX-3R3M-1 at 186mOhm, PA4335.332NLT at 163mOhm, and 74438323033 at 264mOhm. Lower DCR reduces power dissipation and heat generation, improving efficiency. Applications sensitive to DCR-induced voltage drop should account for these variations.

Q: Are all substitute parts RoHS3 and MSL 1 compliant?

A: Yes. All three substitute parts carry RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, matching the regulatory and handling requirements of the original VLS252010T-3R3M.

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