VLS252012CX-4R7M Equivalent & Substitute Parts

Part Overview

The VLS252012CX-4R7M is a 4.7 µH shielded drum core wirewound inductor manufactured by TDK, designed for surface mount applications in the 1008 (2520 Metric) package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and design requirements. The part delivers 1.24 A current rating with 210 mOhm maximum DC resistance and operates across -40°C to 105°C temperature range.

Substiute Parts

VLS252012CX-4R7M

TDKIn Stock: 3469VLS252012CX-4R7M Datasheet

Current PartRFQ

BWVH002520124R7M00

Pulse ElectronicsIn Stock: 939BWVH002520124R7M00 Datasheet

SimilarRFQ

BWVH002520124R7MH1

Pulse ElectronicsIn Stock: 661BWVH002520124R7MH1 Datasheet

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BWVH002520124R7T00

Pulse ElectronicsIn Stock: 969BWVH002520124R7T00 Datasheet

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BWVH002520124R7TH1

Pulse ElectronicsIn Stock: 1201BWVH002520124R7TH1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VLS252012CX-4R7M are qualified based on the following electrical and mechanical parameters:

Primary Matching Criteria:

• Inductance value: 4.7 µH
• Package / Case: 1008 (2520 Metric)
• Shielding: Shielded
• Mounting Type: Surface Mount
• Physical footprint compatibility: 0.098" L x 0.079" W (2.50mm x 2.00mm)

Secondary Compatibility Parameters:

• Inductance tolerance: ±20% or ±30%
• Current rating: 930 mA minimum (below original 1.24 A specification)
• Saturation current: 1.0 A or 1.1 A
• DC resistance: 195 mOhm or 235 mOhm
• Operating temperature range: -55°C ~ 125°C (extended range)
• RoHS3 compliance and MSL 1 rating

All four substitute parts from Pulse Electronics (BWVH series) meet the primary matching criteria. Variations in current rating, DC resistance, and tolerance must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

All four Pulse Electronics BWVH series inductors are active products with ROHS3 compliance and MSL 1 rating, providing regulatory continuity with the obsolete TDK VLS252012CX-4R7M.

Selection Considerations:

The substitute parts present a reduced current rating of 930 mA compared to the original 1.24 A specification. Circuit designs operating at or near the original current rating require evaluation to confirm compatibility within the lower current specification.

DC resistance variations (195 mOhm or 235 mOhm) differ from the original 210 mOhm maximum. Lower resistance options (195 mOhm) reduce power dissipation; higher resistance options (235 mOhm) increase dissipation. Circuit thermal and efficiency analysis determines suitability.

Inductance tolerance options of ±20% (BWVH002520124R7M00, BWVH002520124R7MH1) match the original specification. Tolerance of ±30% (BWVH002520124R7T00, BWVH002520124R7TH1) provides broader manufacturing variation and may require circuit validation.

Saturation current specifications of 1.0 A or 1.1 A remain below the original 1.1 A rating. Circuits with transient current peaks must account for this parameter.

Physical height increases from 0.047" to 0.049" (0.03mm difference) are negligible for most PCB assembly applications but require verification in space-constrained designs.

Extended operating temperature range (-55°C ~ 125°C) of substitute parts exceeds the original -40°C ~ 105°C specification, providing enhanced thermal margin.

Frequently Asked Questions (FAQ)

Q: Can BWVH002520124R7M00 directly replace VLS252012CX-4R7M in existing designs?

A: Direct replacement requires circuit validation. The substitute part matches inductance value, package, and shielding but operates at 930 mA versus the original 1.24 A rating. Designs operating below 930 mA are compatible. Designs requiring the full 1.24 A rating require circuit modification or alternative sourcing.

Q: What is the difference between the four BWVH substitute parts?

A: The four parts differ in two parameters. BWVH002520124R7M00 and BWVH002520124R7MH1 specify ±20% inductance tolerance; BWVH002520124R7T00 and BWVH002520124R7TH1 specify ±30% tolerance. BWVH002520124R7M00 and BWVH002520124R7T00 feature 195 mOhm DC resistance; BWVH002520124R7MH1 and BWVH002520124R7TH1 feature 235 mOhm DC resistance. Selection depends on circuit tolerance requirements and acceptable power dissipation.

Q: Are the substitute parts physically compatible with the original PCB footprint?

A: Yes. All substitute parts use the 1008 (2520 Metric) package with identical 0.098" L x 0.079" W (2.50mm x 2.00mm) footprint. Seated height increases from 0.047" to 0.049" (0.03mm), which is negligible for standard PCB assembly. Designs with height constraints below 0.049" require clearance verification.

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

A: Yes. All four BWVH substitute parts are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the original VLS252012CX-4R7M compliance profile.

Q: Which substitute part should be selected for lowest power dissipation?

A: BWVH002520124R7M00 and BWVH002520124R7T00 feature 195 mOhm DC resistance, providing lower dissipation than the 235 mOhm options. Selection between these two depends on inductance tolerance requirements: ±20% (BWVH002520124R7M00) or ±30% (BWVH002520124R7T00).

Q: What is the impact of reduced saturation current on circuit performance?

A: Saturation current specifications of 1.0 A or 1.1 A are below the original 1.1 A rating. Circuits with transient or peak currents exceeding these values experience inductor saturation, reducing inductance and increasing core losses. Circuit analysis must confirm peak current operation remains below the selected part's saturation specification.