ASPI-0310FSSA-4R7M-T4 Equivalent & Substitute Parts

Part Overview

The ASPI-0310FSSA-4R7M-T4 is a 4.7 µH shielded drum core wirewound inductor manufactured by Abracon LLC, rated for 900 mA continuous current with 170mOhm DC resistance. This component is classified as obsolete, necessitating identification of equivalent alternatives for ongoing production and maintenance applications. The part features a compact 3.00mm x 3.00mm surface mount package with nickel zinc ferrite core construction and ROHS3 compliance.

Substiute Parts

ASPI-0310FSSA-4R7M-T4

Abracon LLCIn Stock: 790ASPI-0310FSSA-4R7M-T4 Datasheet

Current PartRFQ

ASPI-0310FS-470M-T2

Abracon LLCIn Stock: 778ASPI-0310FS-470M-T2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASPI-0310FSSA-4R7M-T4 is constrained by the following critical parameters:

Inductance Value: The primary specification is 4.7 µH at 100 kHz test frequency with ±20% tolerance, establishing the functional operating range of 3.76 µH to 5.64 µH.

Current Handling Capability: The 900 mA continuous current rating and 770 mA saturation current define the maximum load capacity. Substitute parts must maintain equivalent or superior current ratings to ensure safe operation under specified load conditions.

DC Resistance: The 170 mOhm DCR specification directly impacts power dissipation and thermal performance. Substitute parts with significantly higher DCR values will increase heat generation and may require thermal management reassessment.

Physical Package: The 3.00mm x 3.00mm x 1.00mm surface mount footprint is a hard constraint for PCB layout compatibility. All substitute parts must maintain identical or compatible dimensions.

Core Material and Shielding: Nickel zinc ferrite core construction with shielding provides electromagnetic isolation. Substitute parts must retain these characteristics to prevent EMI coupling and maintain circuit performance.

Environmental Compliance: ROHS3 compliance and MSL 1 rating are mandatory for production environments. Substitute parts must meet or exceed these certifications.

The identified substitute ASPI-0310FS-470M-T2 does not meet the inductance specification (47 µH versus 4.7 µH required) and exhibits significantly reduced current rating (350 mA versus 900 mA required), making it unsuitable as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The ASPI-0310FS-470M-T2 listed as a substitute does not meet the electrical specifications required for direct replacement of the ASPI-0310FSSA-4R7M-T4. The 10-fold inductance increase (47 µH versus 4.7 µH) and 60% reduction in current rating (350 mA versus 900 mA) represent fundamental functional incompatibilities that preclude substitution in circuits designed for the original part.

For applications requiring the ASPI-0310FSSA-4R7M-T4, component sourcing should prioritize:

Active Inventory Status: The ASPI-0310FS-470M-T2 maintains active product status with Abracon LLC, ensuring continued availability and manufacturing support. The original part is classified as obsolete, limiting future procurement options.

Compliance Certification: Both parts maintain ROHS3 compliance and MSL 1 moisture sensitivity ratings, satisfying environmental and manufacturing requirements for current production standards.

Alternative Sourcing Strategy: For circuits requiring 4.7 µH inductance at 900 mA, evaluation of alternative manufacturers' equivalent drum core wirewound inductors with matching electrical and mechanical specifications is necessary. Candidates must satisfy the inductance tolerance (±20%), current rating (900 mA minimum), and physical package constraints (3.00mm x 3.00mm x 1.00mm).

Frequently Asked Questions (FAQ)

Q: Can the ASPI-0310FS-470M-T2 replace the ASPI-0310FSSA-4R7M-T4 in my circuit?

A: No. The ASPI-0310FS-470M-T2 has a 47 µH inductance value, which is 10 times higher than the required 4.7 µH. Additionally, its 350 mA current rating is insufficient for the 900 mA specification of the original part. These differences make it unsuitable for direct substitution.

Q: What are the critical parameters that determine if an inductor can substitute for the ASPI-0310FSSA-4R7M-T4?

A: The inductance value (4.7 µH ±20%), current rating (900 mA minimum), saturation current (770 mA minimum), DC resistance (170 mOhm reference), core material (nickel zinc ferrite), shielding (required), and physical package dimensions (3.00mm x 3.00mm x 1.00mm) are the primary constraints for substitution eligibility.

Q: Why is the ASPI-0310FS-470M-T2 listed as a substitute if it is not compatible?

A: The listing reflects manufacturer cross-reference data within the ASPI series family. However, cross-reference does not guarantee functional equivalence. Engineering evaluation of specific electrical parameters is required to confirm substitution suitability for individual applications.

Q: Are there compliance or packaging differences between these parts?

A: Both parts maintain ROHS3 compliance, MSL 1 moisture sensitivity, and identical physical dimensions (3.00mm x 3.00mm x 1.00mm). The ASPI-0310FS-470M-T2 is supplied in Tape & Reel packaging, while the original part packaging is not specified. Packaging format does not affect functional compatibility.

Q: What should I do if I cannot source the ASPI-0310FSSA-4R7M-T4?

A: Identify alternative manufacturers offering 4.7 µH shielded drum core wirewound inductors with 900 mA current rating, ±20% tolerance, and compatible surface mount packaging. Verify that candidate parts meet the DC resistance, saturation current, and operating temperature specifications before design implementation.