ELL-8TP102MB Equivalent & Substitute Parts

Part Overview

The ELL-8TP102MB is a 1 mH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 330 mA continuous current with 2.1Ω DC resistance. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part features nonstandard corner terminals and surface mount packaging in an 8.00mm × 8.00mm footprint.

Substiute Parts

ELL-8TP102MB

Panasonic Electronic ComponentsIn Stock: 680ELL-8TP102MB Datasheet

Current PartRFQ

74404086102

Würth ElektronikIn Stock: 552074404086102 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-8TP102MB is determined by the following critical parameters:

• Inductance Value: Must be 1 mH with ±20% tolerance
• Current Rating: Minimum 330 mA continuous current capability
• Saturation Current: Minimum 250 mA
• DC Resistance: Acceptable range 2.1Ω ± tolerance margin
• Mounting Type: Surface mount only
• Footprint Compatibility: 8.00mm × 8.00mm base dimensions
• Height Constraint: Maximum seated height 5.00mm preferred; 6.50mm acceptable with mechanical clearance verification
• Regulatory Compliance: ROHS3 compliant minimum
• Operating Temperature: Minimum -40°C to 105°C range

The Würth Elektronik 74404086102 meets these substitution criteria with equivalent inductance, superior current handling (480 mA vs. 330 mA), and compatible footprint dimensions, though with increased height and semi-shielded construction.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 74404086102 is a qualified substitute for the obsolete ELL-8TP102MB based on the following factors:

• Regulatory Compliance: Both components meet ROHS3 requirements and share identical moisture sensitivity classification
• Active Product Status: The Würth part is currently in active production with confirmed inventory availability (5452 pcs), ensuring long-term supply continuity
• Performance Margin: The substitute provides 45% higher current rating (480 mA vs. 330 mA) and 160% higher saturation current (650 mA vs. 250 mA), offering design margin for thermal and transient conditions
• Mechanical Compatibility: Identical base footprint (8.00mm × 8.00mm) with 1.50mm additional height (6.50mm vs. 5.00mm) requires verification of available PCB clearance
• Electrical Equivalence: Inductance value and tolerance are identical; DC resistance increase of 0.25Ω (11.9% higher) is within acceptable design tolerance for most applications
• Temperature Range Extension: Operating range extends to 125°C, providing additional thermal margin

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 74404086102 directly replace the Panasonic ELL-8TP102MB without PCB modification?

A: Direct replacement is possible if PCB layout provides minimum 6.50mm vertical clearance above the component. The base footprint is identical (8.00mm × 8.00mm), but the substitute is 1.50mm taller. Verify clearance to adjacent components, solder mask, and conformal coating thickness before implementation.

Q: What is the impact of the 0.25Ω increase in DC resistance?

A: The DCR increase from 2.1Ω to 2.35Ω represents an 11.9% rise. Power dissipation increases proportionally with current squared (I²R). At rated current (330 mA), dissipation increases from 228.3 mW to 255.6 mW, a 12% increase. Verify thermal design margins in your application.

Q: Why is the substitute semi-shielded instead of fully shielded?

A: The Würth part uses semi-shielded drum core construction, which provides adequate EMI containment for most applications while optimizing current capacity and saturation performance. If full shielding is a critical requirement, verify EMI performance in your specific circuit environment.

Q: Are there any certifications or standards differences?

A: The Würth part carries AEC-Q200 automotive qualification, which the original Panasonic part does not list. Both meet ROHS3 compliance and share identical moisture sensitivity levels. The substitute's broader temperature range (-40°C to 125°C vs. -40°C to 105°C) provides additional operational margin.

Q: What is the packaging difference between these parts?

A: The ELL-8TP102MB is supplied in standard packaging format. The Würth 74404086102 is supplied in Tape & Reel (TR) format, which is standard for high-volume production. Verify your procurement and assembly processes support TR packaging.

Q: Can I use the substitute in designs requiring the original part's full shielding specification?

A: Semi-shielded construction may not meet full shielding requirements in noise-sensitive applications. Conduct EMI testing in your specific circuit topology to confirm performance equivalence before production release.