ASPI-0309-2R2M-T4 Equivalent & Substitute Parts

Part Overview

The ASPI-0309-2R2M-T4 is a 2.2 µH unshielded drum core wirewound inductor manufactured by Abracon LLC, rated for 1 A continuous current with 170mOhm DC resistance. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications. The part is surface mount, RoHS3 compliant, and suitable for applications requiring compact inductance in the 2.2 µH range at 100 kHz test frequency.

Substiute Parts

ASPI-0309-2R2M-T4

Abracon LLCIn Stock: 839ASPI-0309-2R2M-T4 Datasheet

Current PartRFQ

NRV3012T2R2M

Taiyo YudenIn Stock: 2977NRV3012T2R2M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ASPI-0309-2R2M-T4 is determined by the following critical parameters:

• Inductance Value: Must be 2.2 µH with ±20% tolerance
• Current Rating: Minimum 1 A continuous current capability
• DC Resistance: Must not exceed 170mOhm to maintain circuit performance
• Core Type: Drum core wirewound construction
• Mounting Type: Surface mount configuration
• Package Footprint: 3.00mm x 3.00mm base dimensions
• Height Constraint: Maximum seated height of 0.90mm preferred for PCB clearance compatibility

The NRV3012T2R2M from Taiyo Yuden meets the primary electrical specifications (2.2 µH, ±20% tolerance, 1.1 A rating, 144mOhm DCR) and maintains identical footprint dimensions. However, physical height differs at 1.20mm maximum, requiring mechanical verification for specific applications.

Parameter Comparison

Engineering Selection Recommendations

The NRV3012T2R2M qualifies as a functional equivalent based on matching inductance value, tolerance, and current rating specifications. Key considerations for selection:

Electrical Compatibility: The substitute part exceeds the original current rating (1.1 A vs. 1 A) and provides lower DC resistance (144mOhm vs. 170mOhm), resulting in reduced power dissipation and improved circuit efficiency.

Mechanical Compatibility: Identical footprint dimensions (3.00mm x 3.00mm) ensure PCB layout compatibility. The increased height (1.20mm vs. 0.90mm) requires verification against available PCB clearance in the target application.

Shielding Difference: The substitute part is shielded, whereas the original is unshielded. Shielded construction reduces electromagnetic interference emission and susceptibility, which may be beneficial or neutral depending on circuit requirements.

Product Status: The original ASPI-0309-2R2M-T4 is obsolete. The substitute NRV3012T2R2M is classified as "Not For New Designs," indicating limited long-term availability. Both parts carry ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Temperature Range: The substitute supports an extended operating temperature range (-25°C ~ 125°C vs. -30°C ~ 100°C), providing broader environmental compatibility.

Frequently Asked Questions (FAQ)

Q: Can the NRV3012T2R2M directly replace the ASPI-0309-2R2M-T4 on existing PCBs?

A: Yes, for applications where the increased height (1.20mm vs. 0.90mm) does not create clearance conflicts. The identical 3.00mm x 3.00mm footprint ensures solder pad alignment. Verify available vertical space above the component location before implementation.

Q: What is the impact of the shielded vs. unshielded difference?

A: The shielded construction of the NRV3012T2R2M reduces radiated electromagnetic interference. In noise-sensitive circuits, this may improve performance. In applications where the original unshielded design was intentional, shielding introduces negligible risk but should be confirmed against circuit design specifications.

Q: Are there electrical performance differences between these parts?

A: The substitute provides superior electrical characteristics: lower DC resistance (144mOhm vs. 170mOhm) reduces I²R losses, and higher saturation current (1.8A vs. 980mA) provides greater headroom. Both maintain the same 2.2 µH inductance and ±20% tolerance at 100 kHz test frequency.

Q: What is the packaging difference?

A: The original ASPI-0309-2R2M-T4 packaging is not specified. The substitute NRV3012T2R2M is supplied in Tape & Reel (TR) format, standard for automated assembly processes.

Q: Are both parts RoHS compliant?

A: Yes. Both the ASPI-0309-2R2M-T4 and NRV3012T2R2M are ROHS3 compliant with unlimited moisture sensitivity (MSL 1), suitable for standard reflow soldering processes without baking requirements.

Q: What is the self-resonant frequency consideration?

A: The substitute specifies 70MHz self-resonant frequency, whereas the original does not provide this specification. This indicates the substitute maintains inductive behavior up to 70MHz, relevant for high-frequency circuit applications above the 100 kHz test frequency.