ASPI-0840-3R6N Equivalent & Substitute Parts

Part Overview

The ASPI-0840-3R6N is a 3.6 µH shielded drum core wirewound inductor manufactured by Abracon LLC, rated for 5.4 A continuous current with 15mOhm DC resistance. This component is designed for surface mount applications in compact 8.00mm x 8.00mm form factors. The part is currently obsolete, necessitating identification of active equivalent components that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

ASPI-0840-3R6N

Abracon LLCIn Stock: 1037ASPI-0840-3R6N Datasheet

Current PartRFQ

ASPI-8040S-3R6N-T

Abracon LLCIn Stock: 784ASPI-8040S-3R6N-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASPI-0840-3R6N is determined by the following critical parameters:

Inductance Value: The substitute part must maintain 3.6 µH inductance at the 100 kHz test frequency to ensure circuit performance equivalence.

Physical Dimensions: The substitute must conform to the 8.00mm x 8.00mm x 4.20mm (max) footprint to ensure mechanical compatibility with existing PCB layouts.

Core Material and Shielding: Both the main part and substitute utilize ferrite drum core construction with shielding, maintaining electromagnetic performance characteristics.

Mounting Technology: Surface mount configuration is required for compatibility with automated assembly processes.

Regulatory Compliance: ROHS3 compliance is mandatory for current production and supply chain requirements.

The ASPI-8040S-3R6N-T qualifies as a substitute based on matching inductance value, identical physical dimensions, identical core material and shielding configuration, and surface mount compatibility. The substitute part is currently in active production status, addressing the obsolescence of the original component.

Parameter Comparison

Engineering Selection Recommendations

The ASPI-8040S-3R6N-T is the designated substitute for the obsolete ASPI-0840-3R6N based on the following engineering criteria:

Electrical Equivalence: Both components maintain identical 3.6 µH inductance values at 100 kHz test frequency, ensuring circuit performance compatibility. The ±30% tolerance specification is identical across both parts.

Mechanical Compatibility: Identical physical dimensions (8.00mm x 8.00mm x 4.20mm max) ensure direct PCB footprint compatibility without layout modifications.

Regulatory Compliance: The substitute part maintains ROHS3 compliance, meeting current supply chain and environmental requirements.

Production Status: The substitute part is in active production, ensuring long-term availability and supply chain continuity.

Current Rating Consideration: The substitute part has a reduced current rating (4.35 A versus 5.4 A) and saturation current (5.75 A versus 6 A). Circuit designs operating at or near the original 5.4 A specification require evaluation to confirm operation within the substitute part's 4.35 A continuous current limit.

DC Resistance: The substitute part exhibits slightly elevated DC resistance (17mOhm max versus 15mOhm), resulting in marginally increased power dissipation. This difference is within typical design tolerances for most applications.

Temperature Range: The substitute part supports an extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), providing additional thermal margin in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can the ASPI-8040S-3R6N-T be used as a direct replacement for the ASPI-0840-3R6N?

A: The ASPI-8040S-3R6N-T is mechanically and electrically compatible for applications where the circuit current requirement does not exceed 4.35 A continuous. The identical inductance value, physical dimensions, and core configuration support direct substitution in most applications. Circuits designed for the original 5.4 A rating require current limit verification.

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

A: The substitute part exhibits 17mOhm maximum DC resistance compared to 15mOhm in the original part. This 2mOhm increase results in proportionally higher resistive losses. For a 5 A circuit, this represents approximately 0.5 mW additional power dissipation, which is negligible in most applications.

Q: Are the physical dimensions identical between the two parts?

A: Yes. Both the ASPI-0840-3R6N and ASPI-8040S-3R6N-T maintain identical surface mount footprints of 8.00mm x 8.00mm with a maximum seated height of 4.20mm, ensuring direct PCB compatibility without layout modifications.

Q: What is the difference in packaging between these parts?

A: The original ASPI-0840-3R6N is supplied in bulk packaging, while the substitute ASPI-8040S-3R6N-T is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes and does not affect component functionality.

Q: Does the substitute part support the same operating temperature range?

A: The substitute part supports an extended temperature range of -40°C to 125°C compared to the original -40°C to 85°C specification. This provides additional thermal margin and is fully backward compatible with applications designed for the original temperature range.

Q: Are both parts RoHS compliant?

A: Yes. Both the ASPI-0840-3R6N and ASPI-8040S-3R6N-T are ROHS3 compliant, meeting current environmental and supply chain requirements.

Q: What is the saturation current difference between these parts?

A: The original part has a saturation current of 6 A, while the substitute has 5.75 A. This 0.25 A difference is minimal and does not affect applications operating below the continuous current rating of 4.35 A.