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

Part Overview

The AISC-0402F-18NM-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-18NM-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 inductor specification.

Substiute Parts

AISC-0402F-18NM-T

Abracon LLCIn Stock: 752AISC-0402F-18NM-T Datasheet

Current PartRFQ

AISC-0402HP-18NJ-T

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AISC-0402F-18NM-T is determined by the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 18 nH
• Package / Case: 0402 (1005 Metric)
• Mounting Type: Surface Mount
• Shielding configuration: Unshielded

Allowable Parameter Variations:

• Current Rating: Substitute must meet or exceed 1.4 A requirement
• DC Resistance: Substitute must not exceed 46 mOhm maximum
• Tolerance: Substitute tolerance of ±5% is tighter than original ±20%, providing improved performance
• Core Material: Ferrite or ceramic core materials are functionally equivalent for this inductance value and frequency range
• Operating Temperature Range: Substitute range of -40°C to 125°C encompasses the original -40°C to 85°C specification
• Product Status: Active status substitutes are preferred for obsolete components

The AISC-0402HP-18NJ-T meets all mandatory matching parameters and operates within allowable variations for current rating and DC resistance specifications.

Parameter Comparison

Engineering Selection Recommendations

The AISC-0402HP-18NJ-T is the designated substitute for the obsolete AISC-0402F-18NM-T based on the following engineering criteria:

Compliance and Regulatory Status: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards. The substitute part carries active product status, providing assured long-term availability and supply chain continuity.

Electrical Compatibility: The substitute maintains identical inductance value (18 nH) and package configuration (0402 surface mount). The tighter tolerance specification (±5% versus ±20%) of the substitute provides improved circuit performance and reduced inductance variation across production batches.

Current Rating Consideration: The substitute part is rated for 850 mA maximum current, which is lower than the original 1.4 A specification. Applications requiring current levels exceeding 850 mA must evaluate alternative substitutes or confirm that actual circuit current demands remain within the substitute's rating.

DC Resistance Trade-off: The substitute exhibits higher DC resistance (140 mOhm maximum versus 46 mOhm maximum). This parameter difference must be evaluated against circuit requirements, particularly in applications sensitive to resistive losses or thermal dissipation.

Temperature Operating Range: The substitute extends the upper operating temperature limit to 125°C, providing enhanced thermal margin beyond the original 85°C specification.

Frequently Asked Questions (FAQ)

Q: Can the AISC-0402HP-18NJ-T directly replace the AISC-0402F-18NM-T in existing designs?

A: Direct replacement is possible for applications where circuit current does not exceed 850 mA. The identical inductance value, package configuration, and unshielded drum core design ensure functional compatibility. However, the higher DC resistance of the substitute must be evaluated for impact on circuit performance and thermal characteristics.

Q: What is the significance of the tolerance difference between ±20% and ±5%?

A: The substitute part's ±5% tolerance provides tighter inductance control compared to the original ±20% specification. This results in reduced inductance variation across production lots and improved circuit performance consistency. Applications with strict inductance requirements benefit from this tighter tolerance.

Q: Why does the substitute have a lower current rating (850 mA versus 1.4 A)?

A: The current rating difference reflects the design characteristics of the substitute inductor. Applications operating at currents between 850 mA and 1.4 A require evaluation of alternative substitutes or confirmation that actual circuit current remains within the 850 mA limit.

Q: Are there packaging differences between these two parts?

A: Both components utilize the 0402 (1005 Metric) surface mount package. The substitute is supplied in Tape & Reel (TR) packaging format, which is standard for production environments. Physical dimensions are comparable, with the substitute measuring 0.039" L x 0.022" W (1.00mm x 0.55mm) versus the original 0.043" L x 0.024" W (1.10mm x 0.60mm).

Q: How do the core materials differ between ferrite and ceramic?

A: The original part uses ferrite core material, while the substitute uses ceramic core material. Both materials are suitable for 18 nH inductance applications at the specified frequency ranges. The ceramic core of the substitute exhibits a higher self-resonant frequency (3.55 GHz versus 3 GHz), providing extended high-frequency performance.

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

A: The substitute's 140 mOhm maximum DC resistance is approximately three times higher than the original 46 mOhm specification. This increases resistive losses and heat dissipation in the inductor. Applications sensitive to resistive losses or operating at maximum current levels must evaluate this parameter against circuit requirements.

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

A: The substitute operates across -40°C to 125°C, extending the upper temperature limit by 40°C compared to the original -40°C to 85°C range. This makes the substitute suitable for applications requiring enhanced thermal performance.