ASPI-2012-4R7M-T Equivalent & Substitute Parts

Part Overview

The ASPI-2012-4R7M-T is a 4.7 µH shielded drum core wirewound inductor manufactured by Abracon LLC, designed for surface mount applications in the 2.00mm x 2.00mm nonstandard package format. This component is rated for 820 mA continuous current with a maximum DC resistance of 294 mOhm and operates across the -40°C to 125°C temperature range. The part maintains Active product status with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit operation within the electrical and mechanical tolerances of alternative qualified inductors.

Substiute Parts

ASPI-2012-4R7M-T

Abracon LLCIn Stock: 2123ASPI-2012-4R7M-T Datasheet

Current PartRFQ

VLS2012ET-4R7M

TDK CorporationIn Stock: 6151VLS2012ET-4R7M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ASPI-2012-4R7M-T is determined by the following critical parameters:

• Inductance Value: Must be 4.7 µH with ±20% tolerance
• Package Dimensions: Must match 2.00mm L x 2.00mm W x 1.20mm H (nonstandard surface mount)
• Shielding Configuration: Must be shielded to maintain electromagnetic isolation
• Current Rating: Substitute must support minimum 820 mA continuous operation
• DC Resistance: Must not exceed 294 mOhm maximum
• Saturation Current: Must meet or exceed 970 mA
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The VLS2012ET-4R7M from TDK Corporation qualifies as a substitute based on matching inductance value, package dimensions, shielding type, and compliance certifications. However, the substitute exhibits reduced current handling capacity and higher DC resistance, requiring design verification for applications operating near maximum current specifications.

Parameter Comparison

Engineering Selection Recommendations

The ASPI-2012-4R7M-T maintains Active product status with full manufacturing support and unrestricted design eligibility. The VLS2012ET-4R7M substitute carries Not For New Designs status, restricting its application to legacy system maintenance and field replacement scenarios only.

For new design implementations, the ASPI-2012-4R7M-T is the specified component. The VLS2012ET-4R7M may be considered for existing production lines or repair applications where the reduced current rating (700 mA versus 820 mA), increased DC resistance (336 mOhm versus 294 mOhm), and lower temperature ceiling (105°C versus 125°C) remain within circuit operating margins.

Both components satisfy ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for their respective application windows.

Frequently Asked Questions (FAQ)

Q: Can the VLS2012ET-4R7M replace the ASPI-2012-4R7M-T in new designs?

A: No. The VLS2012ET-4R7M carries Not For New Designs status and is restricted to legacy applications and field replacements only. New designs must specify the ASPI-2012-4R7M-T.

Q: What are the critical differences between these inductors?

A: The primary differences are current rating (820 mA versus 700 mA), DC resistance (294 mOhm versus 336 mOhm maximum), and operating temperature range (-40 to 125°C versus -40 to 105°C). Inductance value, package dimensions, and shielding configuration are identical.

Q: Will the VLS2012ET-4R7M work in circuits designed for 820 mA operation?

A: The VLS2012ET-4R7M is rated for 700 mA continuous current. Circuits requiring 820 mA operation must use the ASPI-2012-4R7M-T or verify that actual operating current remains below 700 mA with adequate design margin.

Q: Are the package dimensions identical?

A: Yes. Both components use the same 2.00mm x 2.00mm x 1.20mm nonstandard surface mount package, ensuring mechanical compatibility and identical PCB footprints.

Q: Do both parts meet compliance requirements?

A: Both components are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Regulatory compliance is equivalent for both parts.

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

A: The VLS2012ET-4R7M exhibits 336 mOhm maximum DC resistance compared to 294 mOhm for the ASPI-2012-4R7M-T. This 42 mOhm increase results in higher resistive losses and heat dissipation. Circuits sensitive to inductor losses or thermal performance must account for this difference.