AISC-0402F-48NJ-T Equivalent & Substitute Parts

Part Overview

The AISC-0402F-48NJ-T is a 48 nH unshielded drum core wirewound inductor manufactured by Abracon LLC, rated for 1.1 A with a maximum DC resistance of 78 mOhm. This component is designed for surface mount applications in the 0402 package form factor. The part is currently classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure supply chain availability for new production runs and field replacements.

Substiute Parts

AISC-0402F-48NJ-T

Abracon LLCIn Stock: 1140AISC-0402F-48NJ-T Datasheet

Current PartRFQ

AISC-0402HP-47NJ-T

Abracon LLCIn Stock: 921AISC-0402HP-47NJ-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AISC-0402F-48NJ-T is evaluated based on the following critical parameters:

Inductance Value: The substitute part must maintain inductance within the tolerance band of the original specification. The AISC-0402HP-47NJ-T provides 47 nH, which falls within ±5% tolerance of the 48 nH requirement (47 nH represents a -2.08% deviation from 48 nH nominal).

Current Rating: The original part supports 1.1 A. The substitute AISC-0402HP-47NJ-T is rated for 420 mA, representing a reduced current capacity. This substitution is valid only in applications where the circuit current demand does not exceed 420 mA.

DC Resistance: The original part specifies 78 mOhm maximum DCR. The substitute part specifies 550 mOhm maximum DCR, representing a significant increase in resistive losses. This parameter difference must be evaluated against circuit performance requirements.

Core Material: The original part uses ferrite core material; the substitute uses ceramic core material. Both are unshielded drum core wirewound constructions suitable for surface mount applications.

Package Compatibility: Both parts are specified for 0402 package form factor with surface mount mounting type, ensuring mechanical and electrical interface compatibility.

Environmental and Compliance: Both parts meet ROHS3 compliance and operate within overlapping temperature ranges, with the substitute supporting an extended upper temperature limit of 125°C versus 85°C for the original.

Parameter Comparison

Engineering Selection Recommendations

The AISC-0402HP-47NJ-T is the manufacturer-recommended substitute for the obsolete AISC-0402F-48NJ-T. Selection of this substitute is appropriate when the following conditions are met:

Current Requirement: Circuit design must accommodate a maximum current rating of 420 mA. Applications requiring the full 1.1 A capability of the original part cannot use this substitute without redesign.

DC Resistance Impact: The increase in DCR from 78 mOhm to 550 mOhm will result in increased resistive losses and heat dissipation. Circuit analysis must confirm that this increased resistance does not degrade performance or exceed thermal limits.

Inductance Tolerance: The 47 nH value of the substitute falls within the ±5% tolerance specification and is acceptable for applications where the original 48 nH value was selected within this tolerance band.

Temperature Operating Range: The substitute part supports an extended upper operating temperature of 125°C, providing improved thermal margin compared to the original 85°C limit.

Compliance and Supply: Both parts maintain ROHS3 compliance and REACH unaffected status. The substitute is currently in active production with confirmed inventory availability, ensuring long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the AISC-0402HP-47NJ-T be used as a direct drop-in replacement for the AISC-0402F-48NJ-T?

A: Direct substitution is possible only if circuit current requirements do not exceed 420 mA and the increased DC resistance of 550 mOhm (versus 78 mOhm) does not compromise circuit performance. The inductance values are within tolerance specification, and both parts use identical 0402 surface mount packaging.

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

A: The substitute part exhibits 7 times higher DC resistance (550 mOhm versus 78 mOhm). This increases resistive losses proportionally to the square of the circuit current. For a 420 mA circuit, losses increase from approximately 13.8 mW to 96.6 mW. Circuit thermal analysis is required to confirm acceptability.

Q: Are there differences in core material between these parts?

A: Yes. The original part uses ferrite core material while the substitute uses ceramic core material. Both are unshielded drum core wirewound constructions. The ceramic core in the substitute provides a higher self-resonant frequency (2.4 GHz versus 1.4 GHz), which may be advantageous in high-frequency applications.

Q: What is the difference between the package specifications listed as "Nonstandard" and "0402 (1005 Metric)"?

A: Both parts are specified for 0402 surface mount package form factor. The original part lists package as "Nonstandard" while the substitute specifies "0402 (1005 Metric)," which is the standard metric designation for this package size. Physical dimensions are compatible for PCB assembly.

Q: Is the substitute part suitable for high-temperature applications?

A: The substitute part supports operating temperatures up to 125°C, compared to 85°C for the original part. This extended temperature range makes the substitute suitable for applications requiring higher thermal operation within the specified limit.