ASPI-0309-100M-T4 Equivalent & Substitute Parts

Part Overview

The ASPI-0309-100M-T4 is a 10 µH unshielded drum core wirewound inductor manufactured by Abracon LLC, rated for 550 mA continuous current with 640mOhm DC resistance. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications. The part operates across the -30°C to 100°C temperature range and is ROHS3 compliant with unlimited moisture sensitivity rating.

Substiute Parts

ASPI-0309-100M-T4

Abracon LLCIn Stock: 2346ASPI-0309-100M-T4 Datasheet

Current PartRFQ

NRV3012T100M

Taiyo YudenIn Stock: 4677NRV3012T100M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ASPI-0309-100M-T4 is determined by the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 10 µH (±20% tolerance acceptable)
• Current rating: minimum 550 mA continuous
• Saturation current: minimum 430 mA
• DC resistance: maximum 640 mOhm
• Package dimensions: 3.00mm x 3.00mm footprint
• Mounting type: Surface Mount
• Inductance test frequency: 100 kHz

Secondary Compatibility Factors:

• Operating temperature range must encompass or exceed -30°C to 100°C
• RoHS3 compliance required
• Moisture sensitivity level: 1 (Unlimited)

The NRV3012T100M from Taiyo Yuden meets these substitution criteria with equivalent inductance, superior current handling (640 mA vs. 550 mA), lower DC resistance (564 mOhm vs. 640 mOhm), and identical package footprint. The substitute provides enhanced performance margins while maintaining mechanical and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The NRV3012T100M qualifies as a direct substitute for the ASPI-0309-100M-T4 based on electrical parameter equivalence and compliance certifications. Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory continuity.

Electrical Performance: The substitute provides superior current handling capacity (640 mA vs. 550 mA) and lower DC resistance (564 mOhm vs. 640 mOhm), delivering improved efficiency margins in power delivery applications. Saturation current increases from 430 mA to 800 mA, reducing core saturation risk under transient conditions.

Mechanical Considerations: The substitute maintains identical XY footprint (3.00mm x 3.00mm) for PCB layout compatibility. The height difference of 0.30mm (1.20mm vs. 0.90mm) requires verification against board clearance constraints and component stacking requirements.

Thermal and Frequency Performance: The substitute extends the operating temperature range to -25°C to 120°C and specifies a self-resonant frequency of 32 MHz, providing additional design margin for high-frequency applications.

Shielding Difference: The substitute incorporates shielding versus the unshielded design of the original part. In applications requiring unshielded operation to avoid magnetic coupling effects, this difference must be evaluated against circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the NRV3012T100M directly replace the ASPI-0309-100M-T4 on existing PCBs?

A: Yes, for footprint compatibility. The XY dimensions are identical (3.00mm x 3.00mm). However, the 0.30mm height increase must be verified against clearance constraints, component proximity, and any mechanical enclosure specifications.

Q: What are the key electrical advantages of the substitute?

A: The NRV3012T100M provides 90 mA additional current capacity (640 mA vs. 550 mA), 76 mOhm lower DC resistance (564 mOhm vs. 640 mOhm), and 370 mA higher saturation current (800 mA vs. 430 mA), resulting in improved thermal performance and reduced core saturation risk.

Q: Does the shielding on the substitute affect circuit operation?

A: Shielding reduces electromagnetic radiation and susceptibility to external fields. In applications where the unshielded design was intentional for magnetic coupling or specific EMI characteristics, the shielded substitute may alter circuit behavior. Circuit-level validation is required for such applications.

Q: Are both parts compliant with current regulatory standards?

A: Both components are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Both carry EAR99 ECCN classification and identical HTSUS codes (8504.50.4000), ensuring regulatory equivalence.

Q: What is the temperature range difference between these parts?

A: The original part operates -30°C to 100°C, while the substitute operates -25°C to 120°C. The substitute provides a 5°C lower minimum and 20°C higher maximum, extending the usable temperature envelope.

Q: Why is the substitute listed as "Not For New Designs"?

A: Both the original and substitute components carry legacy product status. The original is obsolete; the substitute is not recommended for new designs. For new development, current-generation inductors from active product lines should be evaluated.

Q: How do the core materials compare?

A: The original uses Nickel Zinc Ferrite (NiZn); the substitute uses ferrite material. Both are ferrite-based with compatible magnetic properties at the specified 100 kHz test frequency. Material differences may affect high-frequency performance characteristics not specified in the provided data.