ASPI-104S-101M-T Equivalent & Substitute Parts

Part Overview

The ASPI-104S-101M-T is a 100 µH shielded drum core wirewound inductor manufactured by Abracon LLC, rated for 1.25 A continuous current with a maximum DC resistance of 304mOhm. This surface mount component operates across the temperature range of -40°C to 85°C and is specified for 100 kHz inductance testing. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances while accommodating different packaging formats or expanded operational ranges.

Key Parameters

Parameter	Value	Unit
Inductance	100	µH
Inductance Tolerance	±20%	—
Current Rating	1.25	A
Current - Saturation (Isat)	1.35	A
DC Resistance (DCR) Max	304	mOhm
Core Material	Ferrite	—
Shielding	Shielded	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-40°C to 85°C	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the ASPI-104S-101M-T is determined by the following critical parameters:

Inductance Value: Must be 100 µH with ±20% tolerance
Core Type & Shielding: Ferrite core with shielding required
Current Rating: Minimum 1.25 A continuous current capability
DC Resistance: Maximum 304mOhm at rated current
Mounting Configuration: Surface mount technology
Compliance: RoHS3 compliance required

The DR124-101-R from Eaton - Electronics Division qualifies as a direct substitute based on matching inductance, core material, shielding configuration, and mounting type. The substitute part exceeds the minimum current rating (1.5 A vs. 1.25 A) and saturation current (1.79 A vs. 1.35 A), providing enhanced current handling capability. DC resistance remains within acceptable limits (308mOhm vs. 304mOhm maximum). Physical dimensions and packaging format differ, requiring mechanical layout verification during integration.

Parameter Comparison

Parameter	ASPI-104S-101M-T (Abracon)	DR124-101-R (Eaton)	Compatibility
Inductance	100 µH	100 µH	Match
Inductance Tolerance	±20%	±20%	Match
Current Rating	1.25 A	1.5 A	Substitute Exceeds
Current - Saturation (Isat)	1.35 A	1.79 A	Substitute Exceeds
DC Resistance (DCR) Max	304 mOhm	308 mOhm	Substitute Within Tolerance
Core Material	Ferrite	Ferrite	Match
Shielding	Shielded	Shielded	Match
Mounting Type	Surface Mount	Surface Mount	Match
Operating Temperature Range	-40°C to 85°C	-40°C to 125°C	Substitute Exceeds
Inductance Test Frequency	100 kHz	100 kHz	Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Moisture Sensitivity Level	MSL 1 (Unlimited)	MSL 1 (Unlimited)	Match
Size / Dimension	10.10mm L x 10.00mm W	12.50mm L x 12.50mm W	Substitute Larger
Height - Seated (Max)	4.00 mm	4.50 mm	Substitute Taller
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Different Format

Engineering Selection Recommendations

Both the ASPI-104S-101M-T and DR124-101-R maintain active product status with full RoHS3 compliance and REACH unaffected designation. Selection between these parts depends on application-specific constraints:

ASPI-104S-101M-T is appropriate for space-constrained applications requiring the smaller footprint (10.10mm x 10.00mm) and lower profile (4.00mm maximum height). Tape & Reel packaging supports high-volume automated assembly processes.

DR124-101-R is suitable for applications where enhanced current handling (1.5 A vs. 1.25 A) and extended temperature operation (-40°C to 125°C vs. -40°C to 85°C) provide design margin. The larger physical dimensions (12.50mm x 12.50mm) and increased height (4.50mm) must be accommodated in the PCB layout. Cut Tape and Digi-Reel® packaging options support both manual and automated assembly workflows.

Both parts satisfy the core electrical requirements of 100 µH inductance with ferrite shielded construction and surface mount configuration.

Frequently Asked Questions (FAQ)

Q: Can DR124-101-R directly replace ASPI-104S-101M-T in existing designs?

A: Electrical substitution is valid based on matching inductance, core type, shielding, and mounting technology. However, physical layout verification is required due to larger dimensions (12.50mm x 12.50mm vs. 10.10mm x 10.00mm) and increased height (4.50mm vs. 4.00mm). PCB footprint and clearance must be confirmed before implementation.

Q: What are the key electrical differences between these parts?

A: The DR124-101-R provides higher current rating (1.5 A vs. 1.25 A) and saturation current (1.79 A vs. 1.35 A), offering greater current handling capacity. DC resistance is marginally higher (308mOhm vs. 304mOhm maximum). Operating temperature range extends to 125°C compared to 85°C for the ASPI-104S-101M-T.

Q: Are packaging format differences significant?

A: Yes. The ASPI-104S-101M-T uses Tape & Reel (TR) format, while the DR124-101-R is available in Cut Tape (CT) and Digi-Reel® formats. Assembly process compatibility and supply chain logistics must be evaluated based on production requirements.

Q: Do both parts meet compliance requirements?

A: Both parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity) rating. Compliance status is equivalent for both options.

Q: What inductance tolerance applies to both parts?

A: Both parts specify ±20% inductance tolerance at 100 kHz test frequency. This tolerance band is identical across both components.

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