ASPI-0418S-1R2N-T3 Equivalent & Substitute Parts

Part Overview

The ASPI-0418S-1R2N-T3 is a 1.2 µH shielded drum core wirewound inductor manufactured by Abracon LLC, rated for 1.9 A continuous current with a maximum DC resistance of 63 mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -25°C to 100°C and is fully RoHS3 compliant with unlimited moisture sensitivity rating.

Substiute Parts

ASPI-0418S-1R2N-T3

Abracon LLCIn Stock: 1059ASPI-0418S-1R2N-T3 Datasheet

Current PartRFQ

VLCF4024T-1R2N2R4-2

TDK CorporationIn Stock: 1431VLCF4024T-1R2N2R4-2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ASPI-0418S-1R2N-T3 is determined by the following critical parameters:

• Inductance value must match at 1.2 µH with ±30% tolerance
• Current rating must meet or exceed 1.9 A continuous operation
• DC resistance must not exceed 63 mOhm to maintain circuit performance
• Core material and shielding configuration must remain ferrite drum core, shielded
• Mounting type must be surface mount compatible
• RoHS3 compliance and unlimited MSL rating required for regulatory alignment

The VLCF4024T-1R2N2R4-2 from TDK Corporation qualifies as a direct substitute based on matching inductance specification, superior current rating capability (2.46 A vs. 1.9 A), lower DC resistance (32 mOhm vs. 63 mOhm), and equivalent core construction with shielding.

Parameter Comparison

Engineering Selection Recommendations

The VLCF4024T-1R2N2R4-2 is the qualified substitute for the obsolete ASPI-0418S-1R2N-T3. Selection is supported by:

• Active product status ensuring long-term availability and supply chain continuity
• Identical inductance specification with matching tolerance band
• Enhanced electrical performance through lower DC resistance (32 mOhm vs. 63 mOhm), reducing power dissipation
• Increased current rating margin (2.46 A vs. 1.9 A), providing design headroom
• Extended operating temperature range (-40°C to 105°C vs. -25°C to 100°C)
• Full RoHS3 compliance and unlimited MSL rating maintaining regulatory requirements
• Equivalent shielded ferrite drum core construction preserving electromagnetic performance

Physical dimensions differ slightly (4.00mm x 4.00mm x 2.40mm vs. 4.20mm x 4.20mm x 1.80mm). PCB layout verification is required to confirm footprint compatibility within available board space.

Frequently Asked Questions (FAQ)

Q: Can the VLCF4024T-1R2N2R4-2 directly replace the ASPI-0418S-1R2N-T3 without circuit modification?

A: Yes, the substitute part meets all critical electrical parameters. The inductance value, tolerance, and core shielding are identical. The lower DC resistance and higher current rating provide improved performance margins. Physical dimensions require PCB layout verification for mechanical fit.

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

A: Lower DC resistance (32 mOhm vs. 63 mOhm) reduces resistive losses and heat generation during operation. This improves circuit efficiency and thermal performance without affecting inductance or current handling capability.

Q: Are there packaging differences between these parts?

A: The VLCF4024T-1R2N2R4-2 is supplied in Tape & Reel (TR) format, while the original part packaging is not specified. Both use surface mount technology. The substitute part dimensions are 4.00mm x 4.00mm x 2.40mm compared to 4.20mm x 4.20mm x 1.80mm. Verify PCB footprint compatibility before design release.

Q: Does the extended temperature range of the substitute affect circuit design?

A: The substitute operates from -40°C to 105°C versus -25°C to 100°C for the original. This extended range provides additional design margin and is fully compatible with applications requiring the original temperature specification.

Q: Are both parts RoHS3 compliant?

A: Yes, both the ASPI-0418S-1R2N-T3 and VLCF4024T-1R2N2R4-2 are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), meeting current regulatory requirements.