VLS2012ET-4R7M Equivalent & Substitute Parts

Part Overview

The VLS2012ET-4R7M is a 4.7 µH shielded wirewound inductor manufactured by TDK Corporation, rated for 700 mA continuous current with a maximum DC resistance of 336 mOhm. This component is designed for surface mount applications in compact form factors and operates across the temperature range of -40°C to 105°C. The part carries a "Not For New Designs" status, making identification of suitable alternatives essential for ongoing production and new design initiatives.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Inductance Tolerance	±20%
Current Rating	700 mA
Current - Saturation (Isat)	700 mA
DC Resistance (DCR) Maximum	336 mOhm
Shielding	Shielded
Operating Temperature Range	-40°C to 105°C
Inductance Test Frequency	1 MHz
Mounting Type	Surface Mount
Size	2.00 mm L x 2.00 mm W
Height - Seated (Max)	1.20 mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the VLS2012ET-4R7M is determined by the following critical parameters:

Inductance Value: The substitute must maintain 4.7 µH inductance with ±20% tolerance to ensure circuit performance equivalence.

Current Rating & Saturation: The substitute must support the required current levels. The VLS2012ET-4R7M operates at 700 mA continuous current with saturation at 700 mA. A substitute with equal or higher current rating ensures compatibility.

DC Resistance (DCR): Maximum DCR of 336 mOhm in the original part establishes the upper limit for acceptable power dissipation. Substitutes with equal or lower DCR values maintain thermal performance characteristics.

Shielding: Both the main part and substitute must be shielded to prevent electromagnetic interference in the application circuit.

Operating Temperature Range: The -40°C to 105°C range must be maintained or exceeded by the substitute.

Surface Mount Compatibility: Both parts must be surface mount inductors suitable for automated assembly.

Compliance & Certifications: RoHS3 compliance and REACH unaffected status must be preserved.

The VLS201610CX-4R7M-1 qualifies as a manufacturer-recommended substitute based on these parameters.

Parameter Comparison

Parameter	VLS2012ET-4R7M (Main Part)	VLS201610CX-4R7M-1 (Substitute)
Manufacturer	TDK Corporation	TDK Corporation
Inductance	4.7 µH	4.7 µH
Inductance Tolerance	±20%	±20%
Current Rating	700 mA	1 A
Current - Saturation (Isat)	700 mA	820 mA
DC Resistance (DCR) Maximum	336 mOhm	365 mOhm
Shielding	Shielded	Shielded
Operating Temperature Range	-40°C to 105°C	-40°C to 105°C
Inductance Test Frequency	1 MHz	1 MHz
Mounting Type	Surface Mount	Surface Mount
Size	2.00 mm L x 2.00 mm W	2.00 mm L x 1.60 mm W
Height - Seated (Max)	1.20 mm	1.00 mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Product Status	Not For New Designs	Active

Engineering Selection Recommendations

The VLS201610CX-4R7M-1 is the manufacturer-recommended substitute for the VLS2012ET-4R7M. This substitution is supported by the following factors:

Product Status: The main part carries "Not For New Designs" status, while the substitute maintains "Active" status, ensuring long-term availability and continued manufacturer support.

Compliance Alignment: Both parts maintain ROHS3 compliance and REACH unaffected status, preserving regulatory requirements across applications.

Electrical Performance: The substitute provides higher current rating (1 A versus 700 mA) and higher saturation current (820 mA versus 700 mA), offering improved headroom for circuit operation. The inductance value and tolerance remain identical. The DCR increase of 29 mOhm (from 336 mOhm to 365 mOhm) represents a 8.6% increase, which remains within acceptable limits for most applications.

Physical Compatibility: The substitute features a reduced footprint (1.60 mm width versus 2.00 mm) and lower profile (1.00 mm height versus 1.20 mm), providing space optimization benefits in compact designs.

Thermal Performance: Both parts operate across the identical temperature range, ensuring thermal compatibility.

Frequently Asked Questions (FAQ)

Q: Can the VLS201610CX-4R7M-1 directly replace the VLS2012ET-4R7M in existing designs?

A: Yes. Both parts maintain identical inductance values (4.7 µH ±20%), identical operating temperature ranges (-40°C to 105°C), and identical compliance certifications (ROHS3, REACH unaffected). The substitute provides higher current rating and saturation current, making it suitable for direct substitution in circuits designed for the original part.

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

A: The VLS201610CX-4R7M-1 has a maximum DCR of 365 mOhm compared to 336 mOhm in the original part, representing an 8.6% increase. This results in proportionally higher power dissipation under load. For applications where thermal margin is critical, power dissipation calculations should be performed to confirm acceptability.

Q: Are there package or mounting differences between these parts?

A: Both parts are surface mount inductors with identical mounting compatibility. The substitute features a smaller footprint (2.00 mm × 1.60 mm versus 2.00 mm × 2.00 mm) and lower profile (1.00 mm versus 1.20 mm), which may provide layout advantages in space-constrained designs.

Q: Why is the original part marked "Not For New Designs"?

A: The "Not For New Designs" status indicates that TDK Corporation is transitioning away from this product line. New designs should utilize the VLS201610CX-4R7M-1, which carries "Active" status and ensures continued availability and manufacturer support.

Q: Are the moisture sensitivity levels equivalent?

A: Yes. Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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