ASPI-104S-100M-T Equivalent & Substitute Parts

Part Overview

The ASPI-104S-100M-T is a 10 µH shielded drum core wirewound inductor manufactured by Abracon LLC, rated for 3.8 A continuous current with a maximum DC resistance of 35 mOhm. This surface mount component operates across the temperature range of -40°C to 85°C and is ROHS3 compliant with unlimited moisture sensitivity rating. The part is currently active in production with 1191 units in stock.

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 manufacturers' offerings.

Substiute Parts

ASPI-104S-100M-T

Abracon LLCIn Stock: 1283ASPI-104S-100M-T Datasheet

Current PartRFQ

B82464G4103M000

EPCOS - TDK ElectronicsIn Stock: 3345B82464G4103M000 Datasheet

MFR RecommendedRFQ

CLF10040T-100M-D

TDK CorporationIn Stock: 2375CLF10040T-100M-D Datasheet

MFR RecommendedRFQ

DRA124-100-R

Eaton - Electronics DivisionIn Stock: 899DRA124-100-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ASPI-104S-100M-T is determined by the following criteria:

Critical Parameters (Must Match):

• Inductance value: 10 µH
• Inductance tolerance: ±20%
• Core type: Ferrite, shielded construction
• Mounting type: Surface mount
• Inductance test frequency: 100 kHz

Allowable Variation Parameters:

• Current rating: Substitute must support minimum 3.8 A (higher ratings acceptable)
• DC resistance: Substitute must not exceed 35 mOhm maximum
• Saturation current: Substitute must support minimum 4.4 A (higher ratings acceptable)
• Operating temperature: Substitute range must encompass or extend the -40°C to 85°C specification
• Package dimensions: Minor variations acceptable within nonstandard drum core envelope
• Compliance certifications: ROHS3 compliance required; AEC-Q200 rating acceptable as additional qualification

All three substitute parts meet these criteria and are qualified for direct replacement in applications designed for the ASPI-104S-100M-T.

Parameter Comparison

Engineering Selection Recommendations

B82464G4103M000 (EPCOS - TDK Electronics)

This substitute offers the lowest DC resistance at 30 mOhm maximum, providing improved efficiency in power delivery applications. The extended operating temperature range of -55°C to 150°C accommodates wider environmental specifications. AEC-Q200 qualification indicates automotive-grade reliability. The saturation current of 4.6 A is the lowest among substitutes; applications requiring the full 4.4 A saturation margin of the original part should account for this limitation. Highest inventory availability at 3239 units supports rapid procurement.

CLF10040T-100M-D (TDK Corporation)

This substitute maintains compatibility across all critical electrical parameters with DC resistance of 31.2 mOhm and saturation current of 4.0 A. The operating temperature range extends to 150°C, providing thermal margin beyond the original specification. AEC-Q200 qualification is present. Packaging format is Tape & Reel, which may require adjustment in procurement workflows if the original design specified Cut Tape format. Inventory of 2278 units supports standard lead time requirements.

DRA124-100-R (Eaton - Electronics Division)

This substitute provides the highest saturation current at 6.16 A and maintains DC resistance at 31 mOhm, offering the greatest current margin for transient conditions. The operating temperature range extends to 165°C, the highest among all options. AEC-Q200 qualification is present. Physical dimensions are larger at 12.50 mm × 12.50 mm compared to the original 10.10 mm × 10.00 mm footprint; PCB layout verification is required before selection. Inventory of 864 units is the lowest among substitutes.

All three substitutes are ROHS3 compliant with MSL 1 rating, matching the environmental and regulatory requirements of the original part.

Frequently Asked Questions (FAQ)

Q: Can B82464G4103M000 be used in applications requiring the full 4.4 A saturation current of the ASPI-104S-100M-T?

A: B82464G4103M000 has a saturation current of 4.6 A. Applications operating at or above 4.6 A continuous current must evaluate whether the lower saturation margin is acceptable for the specific circuit design. If saturation headroom is critical, CLF10040T-100M-D or DRA124-100-R are preferred alternatives.

Q: What is the impact of DC resistance differences between the main part and substitutes?

A: The ASPI-104S-100M-T specifies 35 mOhm maximum DCR. All substitutes have lower DCR values (30-31.2 mOhm), which reduces resistive losses and improves efficiency. Lower DCR is a beneficial characteristic and does not create compatibility issues.

Q: Are there PCB layout considerations when substituting DRA124-100-R?

A: DRA124-100-R has a larger footprint at 12.50 mm × 12.50 mm compared to the original 10.10 mm × 10.00 mm. PCB layout must be verified to confirm adequate space for the larger package. Height-seated maximum is 4.50 mm, which is within the nonstandard drum core envelope but should be confirmed against clearance requirements.

Q: Do all substitutes support the same operating temperature range as the original part?

A: The ASPI-104S-100M-T operates from -40°C to 85°C. All three substitutes support this range and extend it further: B82464G4103M000 to -55°C to 150°C, CLF10040T-100M-D to -40°C to 150°C, and DRA124-100-R to -40°C to 165°C. Extended temperature capability does not affect compatibility for designs operating within the original specification.

Q: What is the significance of AEC-Q200 qualification on the substitute parts?

A: AEC-Q200 is an automotive-grade reliability standard. B82464G4103M000, CLF10040T-100M-D, and DRA124-100-R all carry this qualification, indicating enhanced reliability testing and qualification. The original ASPI-104S-100M-T does not specify AEC-Q200; substitutes with this rating provide additional assurance for mission-critical applications.

Q: Are packaging format differences between Cut Tape and Tape & Reel significant for substitution?

A: Packaging format affects procurement and assembly processes but not electrical or mechanical compatibility. ASPI-104S-100M-T is supplied in Cut Tape & Digi-Reel format. CLF10040T-100M-D and DRA124-100-R are supplied in Tape & Reel format. Procurement workflows and assembly equipment must accommodate the different packaging, but the components themselves are functionally equivalent.

Q: Can substitutes be mixed within a single design or production run?

A: All three substitutes meet the electrical and mechanical requirements for direct replacement. However, mixing multiple substitute sources within a single production run introduces supply chain complexity and may complicate traceability and quality documentation. Single-source substitution is recommended for production consistency.