ELL-ATP331MB Equivalent & Substitute Parts

Part Overview

The ELL-ATP331MB is a 330 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 600 mA with a DC resistance of 550mOhm. This surface mount component features nonstandard corner terminals and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production runs and system updates.

Substiute Parts

ELL-ATP331MB

Panasonic Electronic ComponentsIn Stock: 974ELL-ATP331MB Datasheet

Current PartRFQ

7447714331

Würth ElektronikIn Stock: 21807447714331 Datasheet

SimilarRFQ

SRU1038-331Y

Bourns Inc.In Stock: 1867SRU1038-331Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELL-ATP331MB are qualified based on the following critical parameters:

• Inductance Value: Must be 330 µH (matched exactly)
• Current Rating: Must support minimum 600 mA continuous current
• DC Resistance: Must not exceed 550mOhm to maintain circuit performance
• Shielding: Must be shielded to preserve electromagnetic isolation
• Mounting Type: Must be surface mount compatible
• Package Footprint: Must fit 10.00mm x 10.00mm footprint
• Height Constraint: Must not exceed 4.50mm seated height for PCB clearance
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The two substitute parts listed below meet these core electrical and mechanical requirements while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

7447714331 (Würth Elektronik WE-PD Performance Series)

This substitute offers the highest current rating margin at 710 mA, exceeding the original 600 mA specification. The part maintains active product status with AEC-Q200 automotive qualification. However, the DC resistance of 750mOhm exceeds the original 550mOhm specification by 36%, which may impact circuit performance in applications with strict power dissipation requirements. The seated height of 5.00mm exceeds the original 4.50mm constraint by 0.50mm and requires PCB layout verification.

SRU1038-331Y (Bourns Inc. SRU1038 Series)

This substitute provides the closest physical fit with a seated height of 4.10mm, remaining within the original 4.50mm envelope. The current rating of 550 mA is marginally below the original 600 mA specification, requiring circuit analysis to confirm adequacy. The DC resistance of 773mOhm represents a 40% increase over the original specification. The inductance tolerance of ±30% is wider than the original ±20%, which may affect frequency-dependent circuit behavior. The part maintains active product status with full ROHS3 and REACH compliance.

Both substitutes maintain the required 330 µH inductance, shielded construction, surface mount configuration, and 10.00mm x 10.00mm footprint. Selection depends on whether current rating margin or physical height constraint takes priority in the application.

Frequently Asked Questions (FAQ)

Q: Can the 7447714331 be used as a direct replacement despite the 5.00mm height exceeding the 4.50mm limit?

A: Physical height compatibility must be verified against PCB layout constraints. The 0.50mm overage may cause clearance issues with adjacent components or enclosure boundaries. Layout review is required before substitution.

Q: Why does the SRU1038-331Y have a lower current rating (550 mA) than the original (600 mA)?

A: The SRU1038-331Y is rated for 550 mA continuous current, which is 50 mA below the original specification. Circuit analysis must confirm that the application does not require the full 600 mA rating to ensure reliable operation.

Q: How does the increased DC resistance in both substitutes affect circuit performance?

A: The 7447714331 exhibits 36% higher DCR (750mOhm vs. 550mOhm), and the SRU1038-331Y exhibits 40% higher DCR (773mOhm vs. 550mOhm). Increased resistance results in higher power dissipation and potential voltage drop across the inductor. Applications with tight power budget or thermal constraints require detailed analysis.

Q: Are both substitutes compatible with the original packaging and handling requirements?

A: Both substitutes maintain MSL 1 (Unlimited) moisture sensitivity rating and ROHS3 compliance, matching the original part's environmental specifications. Packaging format differs (Tape & Reel for substitutes vs. original specification), but component-level handling requirements remain equivalent.

Q: What is the significance of the inductance tolerance difference between the original (±20%) and the SRU1038-331Y (±30%)?

A: The wider ±30% tolerance on the SRU1038-331Y introduces greater inductance variation across the production range (231 µH to 429 µH vs. 264 µH to 396 µH for the original). Applications with frequency-dependent filtering or resonant circuits may experience performance variation and require circuit margin analysis.

Q: Do the substitute parts offer improved specifications in any area?

A: The 7447714331 provides higher saturation current (1A vs. 550mA) and specified self-resonant frequency (3.15MHz), offering better performance headroom in high-current transient conditions. The SRU1038-331Y provides the smallest physical height (4.10mm), optimizing PCB space utilization.