ASPI-0412S-2R2N-T3 Equivalent & Substitute Parts

Part Overview

The ASPI-0412S-2R2N-T3 is a 2.2 µH shielded drum core wirewound inductor manufactured by Abracon LLC, rated for 1.43 A continuous current with a maximum DC resistance of 105mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. The part operates across the temperature range of -25°C to 100°C and is fully RoHS3 compliant.

Key Parameters

Parameter	Value
Inductance	2.2 µH
Inductance Tolerance	±30%
Current Rating	1.43 A
Current - Saturation (Isat)	1.6 A
DC Resistance (DCR)	105 mOhm Max
Core Material	Ferrite
Shielding	Shielded
Mounting Type	Surface Mount
Package Type	Nonstandard
Size	4.00 mm x 4.00 mm
Height - Seated (Max)	1.20 mm
Operating Temperature	-25°C to 100°C
Inductance Test Frequency	100 kHz
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the ASPI-0412S-2R2N-T3 is determined by strict equivalence across the following critical parameters:

Inductance value: 2.2 µH with ±30% tolerance
Current rating: minimum 1.43 A continuous
DC resistance: maximum 105 mOhm
Core type: Ferrite shielded drum core
Mounting: Surface mount configuration
Physical footprint: 4.00 mm x 4.00 mm base dimensions
Saturation current: minimum 1.6 A

The VLCF4018T-2R2N1R4-2 from TDK Corporation meets all substitution criteria with equivalent inductance, improved current rating (1.44 A), and superior DC resistance performance (60 mOhm max). Both parts maintain identical inductance tolerance, core material, shielding configuration, and base footprint dimensions.

Parameter Comparison

Parameter	ASPI-0412S-2R2N-T3 (Abracon)	VLCF4018T-2R2N1R4-2 (TDK)
Manufacturer	Abracon LLC	TDK Corporation
Product Status	Obsolete	Active
Inductance	2.2 µH	2.2 µH
Inductance Tolerance	±30%	±30%
Current Rating (Amps)	1.43 A	1.44 A
Current - Saturation (Isat)	1.6 A	1.44 A
DC Resistance (DCR)	105 mOhm Max	60 mOhm Max
Core Material	Ferrite	Ferrite
Shielding	Shielded	Shielded
Mounting Type	Surface Mount	Surface Mount
Size / Dimension	4.00 mm x 4.00 mm	4.00 mm x 4.00 mm
Height - Seated (Max)	1.20 mm	1.80 mm
Operating Temperature	-25°C to 100°C	-40°C to 105°C
Inductance Test Frequency	100 kHz	100 kHz
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
Packaging	Nonstandard	Tape & Reel (TR)

Engineering Selection Recommendations

The VLCF4018T-2R2N1R4-2 is the direct active equivalent for the obsolete ASPI-0412S-2R2N-T3. Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility. The TDK substitute provides superior DC resistance performance (60 mOhm versus 105 mOhm), reducing power dissipation in the inductor element. The extended operating temperature range (-40°C to 105°C versus -25°C to 100°C) provides additional thermal margin for demanding applications. Height difference of 0.60 mm (1.80 mm versus 1.20 mm) requires PCB layout verification for clearance-constrained designs. Current rating equivalence (1.44 A versus 1.43 A) and saturation current specifications confirm functional interchangeability within the specified electrical operating envelope.

Frequently Asked Questions (FAQ)

Q: Can the VLCF4018T-2R2N1R4-2 be used as a direct replacement for the ASPI-0412S-2R2N-T3?

A: Yes. Both inductors share identical inductance (2.2 µH ±30%), equivalent current ratings (1.44 A versus 1.43 A), matching core material (ferrite shielded), and identical base footprint (4.00 mm x 4.00 mm). The TDK part is active production status with superior DC resistance performance.

Q: What is the primary difference between these two inductors?

A: The VLCF4018T-2R2N1R4-2 features lower DC resistance (60 mOhm max versus 105 mOhm max), resulting in reduced power dissipation. The TDK part also provides extended temperature range (-40°C to 105°C) and is 0.60 mm taller in seated height.

Q: Are there any PCB layout considerations when substituting these parts?

A: The height difference of 0.60 mm (1.80 mm versus 1.20 mm) must be verified against PCB clearance requirements, particularly in space-constrained applications or designs with low-profile component stacking.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the ASPI-0412S-2R2N-T3 and VLCF4018T-2R2N1R4-2 are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity). Both are REACH unaffected and classified under ECCN EAR99.

Q: What is the saturation current difference, and does it affect substitution?

A: The ASPI-0412S-2R2N-T3 has Isat of 1.6 A, while the VLCF4018T-2R2N1R4-2 has Isat of 1.44 A. For applications operating at or near the 1.43 A continuous rating, the TDK part's saturation specification remains adequate. Applications requiring saturation margin above 1.6 A require additional evaluation.

Q: What packaging format is available for the substitute part?

A: The VLCF4018T-2R2N1R4-2 is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. The original ASPI-0412S-2R2N-T3 used nonstandard packaging.

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