ELL-ATP270MB Equivalent & Substitute Parts

Part Overview

The ELL-ATP270MB is a 27 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 2.2 A continuous current with 47mOhm DC resistance. This component operates at 100 kHz test frequency and features nonstandard corner terminals in a surface mount package measuring 10.00mm × 10.00mm × 4.50mm. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

ELL-ATP270MB

Panasonic Electronic ComponentsIn Stock: 823ELL-ATP270MB Datasheet

Current PartRFQ

7447798271

Würth ElektronikIn Stock: 20467447798271 Datasheet

SimilarRFQ

SRU1038-270Y

Bourns Inc.In Stock: 2687SRU1038-270Y Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-ATP270MB is determined by the following mandatory parameters:

• Inductance Value: 27 µH (primary electrical specification)
• Shielding Type: Shielded construction (electromagnetic containment requirement)
• Mounting Configuration: Surface mount technology (PCB assembly compatibility)
• Package Footprint: Nonstandard 10.00mm × 10.00mm base dimensions (physical placement constraint)
• Regulatory Compliance: ROHS3 compliance and MSL 1 rating (environmental and handling standards)

Substitute parts must satisfy all five criteria. Current rating, DC resistance, and saturation current may vary within acceptable design margins provided the substitute part does not exceed the original circuit's thermal and current-handling requirements. Tolerance variations are acceptable when the substitute maintains the ±20% or tighter specification.

Parameter Comparison

Engineering Selection Recommendations

7447798271 (Würth Elektronik WE-PDF Series)

This substitute provides superior current handling at 4.3 A with lower DC resistance of 42.5mOhm maximum, delivering improved thermal performance. The part maintains ±20% inductance tolerance matching the original specification. Active product status ensures long-term availability and supply chain stability. Height increase to 6.40mm requires PCB layout verification for clearance compatibility. Operating temperature range of -40°C to 150°C exceeds typical industrial requirements. ROHS3 compliance and REACH unaffected status confirm regulatory alignment.

SRU1038-270Y (Bourns Inc. SRU1038 Series)

This substitute maintains identical footprint dimensions (10.00mm × 10.00mm) with minimal height variation (4.10mm versus 4.50mm), enabling direct PCB placement without layout modification. Active product status guarantees supply continuity. Current rating of 1.85 A falls below the original 2.2 A specification; this substitute is suitable only for applications where circuit current demand does not exceed 1.85 A. DC resistance of 78mOhm exceeds the original 47mOhm, resulting in increased power dissipation. Inductance tolerance of ±30% is wider than the original ±20% specification. Operating temperature range of -40°C to 125°C provides adequate industrial coverage. ROHS3 compliance and REACH unaffected status confirm regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the 7447798271 substitute be used in all applications where the ELL-ATP270MB was specified?

A: The 7447798271 is electrically compatible for applications requiring up to 2.2 A continuous current. The increased height (6.40mm versus 4.50mm) requires verification that PCB clearance and component placement constraints are satisfied. Thermal performance improves due to lower DC resistance.

Q: Is the SRU1038-270Y suitable as a direct replacement?

A: The SRU1038-270Y provides identical footprint dimensions and minimal height variation, enabling direct PCB placement. However, the 1.85 A current rating is lower than the original 2.2 A specification. This substitute is appropriate only for circuits where maximum current demand does not exceed 1.85 A. The higher DC resistance (78mOhm) increases power dissipation compared to the original 47mOhm specification.

Q: What is the impact of inductance tolerance differences?

A: The original ELL-ATP270MB specifies ±20% tolerance. The 7447798271 maintains this tolerance. The SRU1038-270Y specifies ±30% tolerance, representing a wider acceptable variation band. Circuit designs dependent on tight inductance control should prioritize the 7447798271 or verify that ±30% tolerance is acceptable for the intended application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both the 7447798271 and SRU1038-270Y are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's regulatory status.

Q: What are the key differences in core material?

A: The original ELL-ATP270MB uses wirewound construction. The 7447798271 employs nickel zinc ferrite (NiZn) drum core with wirewound construction. The SRU1038-270Y uses ferrite drum core with wirewound construction. Core material differences affect frequency response characteristics and thermal stability; both substitutes are suitable for 100 kHz test frequency operation.