AISC-0402F-18NK-T Equivalent & Substitute Parts

Part Overview

The AISC-0402F-18NK-T is a fixed inductor manufactured by Abracon LLC, classified as an 18 nH unshielded drum core, wirewound inductor in 0402 (1005 Metric) surface mount package. This component is rated for 1.4 A maximum current with 46 mOhm maximum DC resistance and operates across the temperature range of -40°C to 85°C.

The AISC-0402F-18NK-T has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductance value and package format.

Substiute Parts

AISC-0402F-18NK-T

Abracon LLCIn Stock: 1013AISC-0402F-18NK-T Datasheet

Current PartRFQ

AISC-0402HP-18NJ-T

Abracon LLCIn Stock: 654AISC-0402HP-18NJ-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AISC-0402F-18NK-T are identified based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Inductance value: 18 nH (exact match required)
• Package format: 0402 (1005 Metric) surface mount (exact match required)
• Shielding configuration: Unshielded (exact match required)
• Core type: Drum core, wirewound construction (exact match required)

Secondary Compatibility Parameters:

• Current rating: Substitute must support minimum 1.4 A or higher
• DC resistance: Substitute must not exceed 46 mOhm maximum
• Operating temperature range: Substitute must cover or exceed -40°C to 85°C
• Regulatory compliance: RoHS3 and REACH status alignment

The AISC-0402HP-18NJ-T meets all primary matching criteria and maintains compatibility across secondary parameters with the exception of current rating (850 mA versus 1.4 A) and DC resistance (140 mOhm maximum versus 46 mOhm maximum). These differences require evaluation based on specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The AISC-0402HP-18NJ-T is an active product substitute for the obsolete AISC-0402F-18NK-T. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and production transitions.

Substitution Feasibility:

The AISC-0402HP-18NJ-T provides identical inductance value (18 nH) and package format (0402 surface mount) with improved inductance tolerance (±5% versus ±10%). The substitute component extends the operating temperature range to -40°C to 125°C, providing broader thermal coverage.

Design Constraint Considerations:

Applications requiring the full 1.4 A current rating of the AISC-0402F-18NK-T must evaluate the 850 mA rating of the AISC-0402HP-18NJ-T against circuit current demands. The substitute exhibits higher DC resistance (140 mOhm maximum versus 46 mOhm maximum), which increases resistive losses and heat dissipation in the component. Circuits sensitive to DC resistance performance or operating at currents exceeding 850 mA require alternative component selection or circuit redesign.

The ceramic core material of the AISC-0402HP-18NJ-T differs from the ferrite core of the main part, resulting in different frequency characteristics and Q-factor performance (26 @ 250 MHz for the substitute).

Frequently Asked Questions (FAQ)

Q: Can the AISC-0402HP-18NJ-T directly replace the AISC-0402F-18NK-T in all applications?

A: Direct substitution is limited by current rating and DC resistance differences. The AISC-0402HP-18NJ-T supports 850 mA maximum current versus 1.4 A for the original part, and exhibits 140 mOhm maximum DC resistance versus 46 mOhm. Substitution is valid only for applications operating within the 850 mA current limit and tolerating the higher DC resistance specification.

Q: Are the physical dimensions compatible between these two parts?

A: Both components use the 0402 (1005 Metric) surface mount package. The AISC-0402F-18NK-T measures 0.043" L x 0.024" W with 0.028" maximum seated height. The AISC-0402HP-18NJ-T measures 0.039" L x 0.022" W with 0.024" maximum seated height. The substitute is slightly smaller in all dimensions and will fit within the same PCB footprint.

Q: What is the difference between ferrite and ceramic core materials in these inductors?

A: The AISC-0402F-18NK-T uses ferrite core material while the AISC-0402HP-18NJ-T uses ceramic core material. These materials exhibit different frequency response characteristics and Q-factor performance. The ceramic core substitute demonstrates a higher self-resonant frequency (3.55 GHz versus 3 GHz) and provides Q-factor specification (26 @ 250 MHz) not listed for the original part.

Q: Does the improved inductance tolerance of the substitute provide design advantages?

A: The AISC-0402HP-18NJ-T offers ±5% inductance tolerance compared to ±10% for the original part. This tighter tolerance reduces inductance variation across production batches and may improve circuit performance in applications sensitive to inductance accuracy. However, this advantage applies only when current and DC resistance requirements are satisfied.

Q: Are both components compliant with current regulatory requirements?

A: Both the AISC-0402F-18NK-T and AISC-0402HP-18NJ-T maintain ROHS3 compliance and REACH unaffected status. The substitute component is currently in active production status, ensuring ongoing availability and regulatory support for new designs.

Q: What is the impact of higher DC resistance on circuit performance?

A: The AISC-0402HP-18NJ-T exhibits 140 mOhm maximum DC resistance compared to 46 mOhm maximum for the original part. This three-fold increase in DC resistance results in higher resistive losses, increased heat dissipation, and greater voltage drop across the inductor at operating current. Applications with strict power loss budgets or thermal constraints require evaluation of this parameter against circuit specifications.