ELL-ATP681MB Equivalent & Substitute Parts

Part Overview

The ELL-ATP681MB is a 680 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 450 mA continuous current with 1.15Ohm DC resistance. This component features nonstandard corner terminals and surface mount packaging in a 10.00mm x 10.00mm footprint. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers to maintain design continuity and ensure supply chain availability.

Substiute Parts

ELL-ATP681MB

Panasonic Electronic ComponentsIn Stock: 1183ELL-ATP681MB Datasheet

Current PartRFQ

7447714681

Würth ElektronikIn Stock: 41627447714681 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELL-ATP681MB is determined by strict equivalence across the following critical parameters:

• Inductance Value: 680 µH with ±20% tolerance
• Current Rating: Minimum 450 mA continuous current capability
• DC Resistance: Maximum 1.15Ohm to maintain circuit performance
• Shielding: Shielded construction required
• Mounting: Surface mount configuration
• Footprint Compatibility: 10.00mm x 10.00mm base dimensions
• Regulatory Compliance: ROHS3 compliance mandatory

The Würth Elektronik 7447714681 meets these substitution criteria with equivalent inductance, superior current rating (510 mA), comparable DC resistance (1.22Ohm max), identical shielding, and matching footprint dimensions. Both components are ROHS3 compliant and feature MSL 1 moisture sensitivity rating.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 7447714681 is the qualified substitute for the obsolete ELL-ATP681MB. Selection is based on the following engineering criteria:

Compliance & Availability: The 7447714681 maintains active product status with 4073 units in stock, ensuring supply chain continuity. Both components are ROHS3 compliant and carry MSL 1 rating, meeting regulatory requirements without additional qualification.

Electrical Performance: The substitute part exceeds the original specification in current handling capacity (510 mA vs. 450 mA) and saturation current (710 mA vs. 380 mA), providing improved thermal margin. DC resistance variance (1.22Ohm max vs. 1.15Ohm) remains within acceptable circuit tolerance limits for 680 µH inductors at this current level.

Physical Compatibility: Footprint dimensions are identical (10.00mm x 10.00mm). The height difference (5.00mm vs. 4.50mm) represents a 0.50mm increase and must be evaluated against PCB clearance constraints in the target application.

Certification: The Würth Elektronik part carries AEC-Q200 automotive qualification and specifies operating temperature range (-40°C ~ 125°C), providing additional reliability documentation compared to the original part.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 7447714681 be used as a direct replacement for the ELL-ATP681MB?

A: Yes, the 7447714681 qualifies as an electrical and mechanical substitute. Both components share identical inductance (680 µH ±20%), shielding type, surface mount configuration, and 10.00mm x 10.00mm footprint. The substitute offers improved current ratings and active product status. PCB height clearance must be verified due to the 0.50mm height increase (5.00mm vs. 4.50mm).

Q: What are the critical parameters for substitution?

A: Substitution eligibility is determined by: inductance value and tolerance, continuous current rating, DC resistance, shielding requirement, surface mount type, footprint dimensions, and regulatory compliance (ROHS3). Deviations in any of these parameters require circuit re-evaluation.

Q: Does the higher DC resistance of the substitute part affect circuit performance?

A: The DC resistance increase from 1.15Ohm to 1.22Ohm represents a 6% variance. For 680 µH inductors operating at 450 mA, this difference typically produces negligible impact on circuit performance. Application-specific thermal and efficiency analysis may be required for power-critical designs.

Q: What is the packaging difference between these parts?

A: The ELL-ATP681MB is supplied in standard packaging, while the 7447714681 is supplied in Tape & Reel (TR) format. Both are surface mount components with identical footprints. Tape & Reel packaging is standard for high-volume production and does not affect component performance or PCB assembly compatibility.

Q: Are there any temperature or environmental differences?

A: The Würth Elektronik substitute specifies operating temperature range (-40°C ~ 125°C) and REACH unaffected status. The original part does not provide explicit temperature specifications. Both components carry MSL 1 (Unlimited) moisture sensitivity rating, indicating equivalent environmental performance.