ASPI-0418S-3R9N-T3 Equivalent & Substitute Parts

Part Overview

The ASPI-0418S-3R9N-T3 is a 3.9 µH shielded drum core wirewound inductor manufactured by Abracon LLC, rated for 1.37 A continuous current with a maximum DC resistance of 111mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain supply chain continuity for new designs and production requirements. The part operates across the temperature range of -25°C to 100°C and is fully RoHS3 compliant.

Substiute Parts

ASPI-0418S-3R9N-T3

Abracon LLCIn Stock: 842ASPI-0418S-3R9N-T3 Datasheet

Current PartRFQ

CDRH4D16FB/NP-3R9NC

Sumida America Components Inc.In Stock: 914CDRH4D16FB/NP-3R9NC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASPI-0418S-3R9N-T3 is determined by the following critical parameters:

• Inductance Value: 3.9 µH (primary electrical specification)
• Inductance Tolerance: ±30% for the original part
• Shielding Configuration: Shielded construction required
• Mounting Technology: Surface mount package
• Current Handling Capability: Minimum 1.37 A continuous rating
• DC Resistance: Lower values acceptable; higher values require circuit validation
• Operating Temperature Range: Minimum -25°C ~ 100°C coverage
• Test Frequency: 100 kHz inductance measurement standard
• Compliance: RoHS3 and MSL Level 1 requirements

The CDRH4D16FB/NP-3R9NC from Sumida America Components Inc. meets these substitution criteria with equivalent inductance, superior current rating, and active product status.

Parameter Comparison

Engineering Selection Recommendations

The CDRH4D16FB/NP-3R9NC is the qualified substitute for the obsolete ASPI-0418S-3R9N-T3 based on the following engineering criteria:

Electrical Compatibility: Both parts deliver 3.9 µH inductance at 100 kHz with shielded construction. The substitute provides superior current handling (2.1 A versus 1.37 A) and lower DC resistance (56.7mOhm versus 111mOhm), resulting in reduced power dissipation and improved thermal performance in the application circuit.

Mechanical Compatibility: Package footprints are comparable with identical seated height (1.80mm). The substitute features a slightly smaller planar dimension (4.00mm versus 4.20mm), which is compatible with existing PCB layouts designed for the original part.

Compliance and Availability: The substitute maintains full RoHS3 compliance and MSL Level 1 rating. Active product status ensures long-term supply chain availability, eliminating obsolescence risk associated with the original part.

Temperature Range: The substitute extends the operating temperature range to -40°C ~ 105°C, providing broader environmental coverage than the original specification.

Frequently Asked Questions (FAQ)

Q: Can the CDRH4D16FB/NP-3R9NC be used as a direct replacement for the ASPI-0418S-3R9N-T3?

A: Yes. Both parts share identical inductance values (3.9 µH), shielded construction, surface mount technology, and equivalent package heights. The substitute meets or exceeds all critical electrical parameters of the original part.

Q: What are the advantages of using the substitute part?

A: The CDRH4D16FB/NP-3R9NC offers higher current rating (2.1 A), lower DC resistance (56.7mOhm), tighter inductance tolerance (±25%), extended temperature range (-40°C ~ 105°C), and active product status with guaranteed supply availability.

Q: Are there any dimensional differences between the two parts?

A: The substitute has a slightly smaller planar footprint (4.00mm x 4.00mm versus 4.20mm x 4.20mm). Seated height remains identical at 1.80mm. PCB layouts designed for the original part accommodate the substitute without modification.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the original and substitute parts are RoHS3 compliant with MSL Level 1 rating, ensuring equivalent environmental and regulatory compliance.

Q: What is the inductance tolerance difference, and does it affect circuit performance?

A: The original part specifies ±30% tolerance while the substitute specifies ±25%. The tighter tolerance of the substitute provides improved inductance consistency, which may enhance circuit performance in applications sensitive to inductance variation.

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

A: The substitute operates to 105°C maximum, compared to 100°C for the original part. For applications requiring operation above 100°C, the substitute provides additional thermal margin.