ASPI-0428S-4R7M-T Equivalent & Substitute Parts

Part Overview

The ASPI-0428S-4R7M-T is a 4.7 µH shielded drum core wirewound inductor manufactured by Abracon LLC, rated for 1.32 A with a maximum DC resistance of 72mOhm. This surface mount component is designed for applications requiring fixed inductance in compact nonstandard packages. The part is currently obsolete, making identification of compatible substitutes essential for ongoing production and maintenance applications. Substitute parts must maintain electrical performance across the specified operating temperature range of -40°C to 85°C while meeting RoHS3 compliance requirements.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Tolerance	±20%
Current Rating	1.32 A
DC Resistance (Max)	72mOhm
Core Material	Ferrite
Shielding	Shielded
Operating Temperature	-40°C ~ 85°C
Inductance Test Frequency	100 kHz
Package Type	Nonstandard
Size	0.185" L x 0.185" W (4.70mm x 4.70mm)
Height (Max)	0.118" (3.00mm)
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

The ASPI-0428S-4R7N-T qualifies as a direct substitute for the ASPI-0428S-4R7M-T based on the following critical parameters:

Electrical Equivalence:

Identical inductance value: 4.7 µH
Identical current rating: 1.32 A
Identical DC resistance maximum: 72mOhm
Identical core material: Ferrite
Identical shielding: Shielded
Identical inductance test frequency: 100 kHz

Mechanical Compatibility:

Identical package dimensions: 0.185" L x 0.185" W (4.70mm x 4.70mm)
Identical maximum seated height: 0.118" (3.00mm)
Identical mounting type: Surface Mount
Identical nonstandard package classification

Environmental & Compliance Alignment:

Identical operating temperature range: -40°C ~ 85°C
Identical RoHS3 compliance status
Identical MSL rating: 1 (Unlimited)
Identical REACH status: REACH Unaffected

The tolerance specification differs (±20% vs ±30%), with the substitute offering wider tolerance. This represents a relaxation of the original specification and does not restrict substitution.

Parameter Comparison

Parameter	ASPI-0428S-4R7M-T (Main)	ASPI-0428S-4R7N-T (Substitute)
Inductance	4.7 µH	4.7 µH
Tolerance	±20%	±30%
Current Rating (Amps)	1.32 A	1.32 A
DC Resistance (Max)	72mOhm	72mOhm
Core Material	Ferrite	Ferrite
Shielding	Shielded	Shielded
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Inductance Test Frequency	100 kHz	100 kHz
Mounting Type	Surface Mount	Surface Mount
Package / Case	Nonstandard	Nonstandard
Size / Dimension	0.185" L x 0.185" W (4.70mm x 4.70mm)	0.185" L x 0.185" W (4.70mm x 4.70mm)
Height - Seated (Max)	0.118" (3.00mm)	0.118" (3.00mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active

Engineering Selection Recommendations

The ASPI-0428S-4R7N-T is the manufacturer-recommended substitute for the obsolete ASPI-0428S-4R7M-T. Selection of the substitute part is justified by:

Product Status: The original part is obsolete, while the substitute maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance Certification: Both parts maintain identical RoHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and production runs.

Electrical Performance: All critical electrical parameters—inductance, current rating, and DC resistance—are identical between the main part and substitute, ensuring functional equivalence in circuit applications.

Physical Compatibility: Identical dimensions and mounting specifications confirm direct mechanical interchangeability in existing PCB layouts without design modification.

Environmental Specifications: Matching operating temperature ranges and MSL ratings confirm suitability for identical environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can the ASPI-0428S-4R7N-T be used as a direct replacement for the ASPI-0428S-4R7M-T?

A: Yes. The substitute part is manufacturer-recommended and maintains identical electrical specifications (inductance, current rating, DC resistance), core material, shielding, and physical dimensions. Both parts are rated for the same operating temperature range and comply with identical regulatory standards.

Q: What is the difference between the tolerance specifications?

A: The main part specifies ±20% tolerance, while the substitute specifies ±30% tolerance. The wider tolerance of the substitute does not restrict its use as a replacement; it represents a relaxation of the original specification.

Q: Are there packaging differences between these parts?

A: The main part is supplied in standard packaging, while the substitute is supplied in Tape & Reel (TR) format. Both use identical nonstandard package classifications and maintain the same physical dimensions and mounting specifications.

Q: Why is the original part obsolete?

A: The ASPI-0428S-4R7M-T is listed as obsolete. The manufacturer-recommended substitute, ASPI-0428S-4R7N-T, is in active production and provides equivalent electrical and mechanical performance.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the main part and substitute maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic components.

Q: What is the MSL rating for these inductors?

A: Both parts carry an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message