ELL-ATP390MB Equivalent & Substitute Parts

Part Overview

The ELL-ATP390MB is a 39 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 1.8 A with a DC resistance of 66mOhm. This component features nonstandard corner terminals and surface mount packaging in a 10.00mm x 10.00mm footprint. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

ELL-ATP390MB

Panasonic Electronic ComponentsIn Stock: 1045ELL-ATP390MB Datasheet

Current PartRFQ

SRR1050A-390Y

Bourns Inc.In Stock: 1406SRR1050A-390Y Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-ATP390MB is determined by the following critical parameters:

• Inductance Value: 39 µH (primary electrical requirement)
• Current Rating: Minimum 1.8 A (must meet or exceed the original specification)
• Saturation Current (Isat): Minimum 1.6 A (must support peak current conditions)
• DC Resistance (DCR): Must be compatible with circuit power dissipation requirements
• Shielding: Shielded construction required
• Surface Mount Packaging: 10.00mm x 10.00mm footprint class
• Compliance: ROHS3 and MSL 1 requirements

The SRR1050A-390Y from Bourns Inc. meets these substitution criteria with equivalent inductance, higher current rating (2.25 A), and compatible physical dimensions within the nonstandard surface mount category.

Parameter Comparison

Engineering Selection Recommendations

The SRR1050A-390Y is a qualified substitute for the ELL-ATP390MB based on the following engineering criteria:

• Electrical Equivalence: Both components provide 39 µH inductance at 100 kHz test frequency with shielded construction.
• Current Capacity: The SRR1050A-390Y exceeds the original current rating (2.25 A vs. 1.8 A) and saturation current specification (2.3 A vs. 1.6 A), providing design margin.
• Compliance Alignment: Both parts meet ROHS3 requirements and carry MSL 1 moisture sensitivity classification.
• Product Status: The substitute is active production status, ensuring long-term availability compared to the obsolete original.
• Physical Compatibility: Footprint dimensions are within acceptable tolerance for nonstandard surface mount applications (10.20mm x 10.00mm vs. 10.00mm x 10.00mm), with a 0.60mm height differential (5.10mm vs. 4.50mm).

The increased DC resistance (106 mOhm Max vs. 66 mOhm) and wider inductance tolerance (±30% vs. ±20%) must be evaluated within specific circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the SRR1050A-390Y directly replace the ELL-ATP390MB in existing designs?

A: Direct replacement is possible for applications where the increased DC resistance and inductance tolerance are acceptable. The higher current rating and saturation current provide design margin. Physical dimensions differ by 0.20mm in length and 0.60mm in height; PCB layout and clearance must be verified.

Q: What is the impact of the higher DC resistance in the SRR1050A-390Y?

A: The SRR1050A-390Y has 106 mOhm maximum DC resistance compared to 66 mOhm in the original. This increases power dissipation in the inductor. For applications sensitive to losses, thermal performance and circuit efficiency must be recalculated.

Q: Are both parts suitable for the same operating temperature range?

A: The SRR1050A-390Y specifies an operating temperature range of -40°C to 125°C. The original ELL-ATP390MB does not provide an operating temperature specification in the available data. Confirm temperature requirements for your application.

Q: What is the significance of the inductance tolerance difference?

A: The ELL-ATP390MB has ±20% tolerance while the SRR1050A-390Y has ±30% tolerance. For circuits requiring tighter inductance control, the wider tolerance of the substitute may impact performance. Circuit simulation or testing is necessary to determine acceptability.

Q: Are there packaging considerations for PCB assembly?

A: The SRR1050A-390Y is supplied in Tape & Reel (TR) packaging, suitable for automated assembly. The nonstandard corner terminal configuration and 0.20mm length difference require PCB footprint verification. Height difference (5.10mm vs. 4.50mm) must be confirmed for clearance in confined spaces.

Q: Do both parts meet automotive qualification standards?

A: The SRR1050A-390Y carries AEC-Q200 qualification. The original ELL-ATP390MB does not list automotive qualification in the available specifications. If automotive compliance is required, the SRR1050A-390Y provides this certification.