VLS252012CX-3R3M Equivalent & Substitute Parts

Part Overview

The VLS252012CX-3R3M is a 3.3 µH shielded drum core wirewound inductor manufactured by TDK Corporation, designed for surface mount applications in the 1008 (2520 Metric) package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part delivers 1.53 A current rating with 137 mOhm maximum DC resistance and operates across the -40°C to 105°C temperature range.

Key Parameters

Parameter	Value
Inductance	3.3 µH
Inductance Tolerance	±20%
Current Rating	1.53 A
Saturation Current (Isat)	1.31 A
DC Resistance (DCR)	137 mOhm Max
Shielding	Shielded
Package / Case	1008 (2520 Metric)
Physical Dimensions	0.098" L x 0.079" W (2.50mm x 2.00mm)
Height - Seated (Max)	0.047" (1.20mm)
Operating Temperature Range	-40°C ~ 105°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the VLS252012CX-3R3M are identified based on strict electrical and mechanical compatibility criteria. The following parameters must align for substitution:

Critical Matching Parameters:

Inductance value: 3.3 µH
Package / Case: 1008 (2520 Metric)
Mounting Type: Surface Mount
Shielding: Shielded
Physical footprint: 0.098" L x 0.079" W (2.50mm x 2.00mm)

Allowable Variation Parameters:

Current Rating: Substitute must meet or exceed 1.53 A requirement
DC Resistance (DCR): Substitute must not exceed 137 mOhm
Saturation Current (Isat): Substitute must meet or exceed 1.31 A
Inductance Tolerance: ±20% or tighter acceptable
Operating Temperature Range: Substitute must cover or exceed -40°C ~ 105°C
Height - Seated: Substitute must not exceed 0.047" (1.20mm)

The identified substitutes from Pulse Electronics (BWVH series) meet the critical matching parameters. However, both substitute parts present trade-offs in current rating and DC resistance that must be evaluated against application requirements.

Parameter Comparison

Parameter	VLS252012CX-3R3M (TDK)	BWVH002520123R3MH1 (Pulse)	BWVH002520123R3TH1 (Pulse)
Inductance	3.3 µH	3.3 µH	3.3 µH
Inductance Tolerance	±20%	±20%	±30%
Current Rating (Amps)	1.53 A	1 A	1 A
Saturation Current (Isat)	1.31 A	1.2 A	1.2 A
DC Resistance (DCR)	137 mOhm Max	190 mOhm	190 mOhm
Shielding	Shielded	Shielded	Shielded
Package / Case	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)
Physical Dimensions	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)
Height - Seated (Max)	0.047" (1.20mm)	0.049" (1.25mm)	0.049" (1.25mm)
Operating Temperature Range	-40°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

BWVH002520123R3MH1 and BWVH002520123R3TH1 Suitability:

Both Pulse Electronics substitutes maintain identical mechanical compatibility and package specifications with the original VLS252012CX-3R3M. Both parts are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability compared to the obsolete TDK component.

Critical Differences Requiring Application Review:

The substitute parts present reduced current rating (1 A versus 1.53 A) and increased DC resistance (190 mOhm versus 137 mOhm). These differences are material and must be evaluated against circuit requirements. Applications operating at or near the original 1.53 A specification cannot use these substitutes without circuit redesign or thermal analysis.

The BWVH002520123R3MH1 maintains ±20% inductance tolerance matching the original specification. The BWVH002520123R3TH1 carries ±30% tolerance, introducing greater inductance variation.

Both substitutes provide expanded operating temperature range (-55°C ~ 125°C) and marginally increased seated height (0.049" versus 0.047"), which may require PCB layout verification in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can BWVH002520123R3MH1 or BWVH002520123R3TH1 directly replace VLS252012CX-3R3M in existing designs?

A: Direct replacement is possible only if circuit current requirements do not exceed 1 A and the increased DC resistance (190 mOhm versus 137 mOhm) does not compromise performance. The 0.002" (0.05mm) height increase must be verified against PCB clearance constraints.

Q: What is the impact of increased DC resistance in the substitute parts?

A: The 53 mOhm increase in DC resistance (from 137 mOhm to 190 mOhm) results in higher resistive losses and increased heat dissipation. For applications with continuous current near 1 A, thermal performance must be re-evaluated.

Q: Why do the two Pulse Electronics parts have different inductance tolerances?

A: BWVH002520123R3MH1 specifies ±20% tolerance, identical to the original. BWVH002520123R3TH1 specifies ±30% tolerance. Selection depends on circuit sensitivity to inductance variation. Tighter tolerance applications should use BWVH002520123R3MH1.

Q: Are the substitute parts suitable for high-frequency applications?

A: Both substitute parts are tested at 1 MHz inductance frequency, matching the original specification. Self-resonant frequency data is not provided for any part in this comparison.

Q: What is the inventory status for these substitutes?

A: BWVH002520123R3MH1 has 742 pieces in stock. BWVH002520123R3TH1 has 1,125 pieces in stock. Both are available as active products from Pulse Electronics.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. Both BWVH series parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and share identical ECCN (EAR99) and HTSUS (8504.50.8000) classifications with the original VLS252012CX-3R3M.

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