ELL-ATV271M Equivalent & Substitute Parts

Part Overview

The ELL-ATV271M is a 270 µH shielded drum core, wirewound inductor manufactured by Panasonic Electronic Components. Designed for surface mount applications, this component operates at 600 mA with a DC resistance of 460mOhm and is rated for 100 kHz inductance testing. The part carries an obsolete product status, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

ELL-ATV271M

Panasonic Electronic ComponentsIn Stock: 1091ELL-ATV271M Datasheet

Current PartRFQ

SRR1050A-271Y

Bourns Inc.In Stock: 2667SRR1050A-271Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-ATV271M is determined by the following critical parameters:

• Inductance Value: Must be 270 µH (matched exactly)
• Core Material & Shielding: Ferrite, shielded construction required
• Mounting Type: Surface mount configuration
• Current Handling: Minimum 600 mA rating
• DC Resistance: Must not exceed design limits for thermal and efficiency considerations
• Physical Dimensions: Compatible with 10.00mm x 10.00mm footprint tolerance
• Compliance: ROHS3 compliance and MSL 1 rating maintained

The SRR1050A-271Y from Bourns Inc. meets these substitution criteria with matching inductance, ferrite shielded core construction, surface mount packaging, and superior current rating (800 mA). Both parts are tested at 100 kHz and maintain ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The SRR1050A-271Y is the qualified substitute for the obsolete ELL-ATV271M. Selection is based on the following engineering factors:

Product Status: The ELL-ATV271M is obsolete, necessitating transition to an active product. The SRR1050A-271Y maintains active status with established supply chain availability.

Compliance & Certifications: Both parts maintain ROHS3 compliance and MSL 1 ratings. The SRR1050A-271Y carries AEC-Q200 qualification, providing additional automotive-grade reliability documentation.

Electrical Equivalence: Matching 270 µH inductance at 100 kHz test frequency ensures functional compatibility. The SRR1050A-271Y provides higher current rating (800 mA vs. 600 mA) and defined saturation current (840 mA), offering design margin improvement.

Physical Compatibility: Dimensional variance is minimal (0.402" vs. 0.394" length; 5.10mm vs. 4.50mm height). PCB footprint compatibility requires verification for height-constrained applications.

DC Resistance Trade-off: The SRR1050A-271Y exhibits higher DCR (675mOhm max vs. 460mOhm), resulting in increased power dissipation. Thermal analysis is required for applications operating at maximum current ratings.

Frequently Asked Questions (FAQ)

Q: Can the SRR1050A-271Y directly replace the ELL-ATV271M without circuit modification?

A: Electrical substitution is valid based on matching inductance value and core construction. Physical PCB layout verification is required due to dimensional differences (length and height). DC resistance increase must be evaluated for thermal impact in the specific application.

Q: What is the significance of the ±20% vs. ±30% tolerance difference?

A: The ELL-ATV271M specifies tighter tolerance (±20%), while the SRR1050A-271Y allows ±30%. For applications requiring inductance precision, circuit performance impact should be assessed. Both tolerances are measured at 100 kHz test frequency.

Q: Why is the DC resistance higher in the SRR1050A-271Y?

A: The SRR1050A-271Y specifies 675mOhm maximum DCR compared to 460mOhm for the ELL-ATV271M. This difference reflects manufacturing design trade-offs. Power dissipation (P = I²R) increases proportionally at rated current; thermal management evaluation is necessary for high-current applications.

Q: Are there packaging differences between these parts?

A: The ELL-ATV271M packaging is not specified. The SRR1050A-271Y is supplied in Tape & Reel (TR) format, standard for automated assembly. Both use nonstandard package cases for this inductor category.

Q: What does AEC-Q200 qualification mean for the SRR1050A-271Y?

A: AEC-Q200 is an automotive-grade reliability standard. The SRR1050A-271Y meets this specification, providing documented performance under automotive environmental and operational conditions. The ELL-ATV271M does not specify this rating.

Q: Is the SRR1050A-271Y suitable for applications requiring the original 600 mA rating?

A: Yes. The SRR1050A-271Y is rated for 800 mA continuous current with 840 mA saturation current, exceeding the original 600 mA requirement. This provides design margin and thermal headroom for the specified operating point.