ELL-4LG150MA Equivalent & Substitute Parts

Part Overview

The ELL-4LG150MA is a 15 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 730 mA continuous current with 300mOhm DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part operates at 100 kHz test frequency and is housed in a nonstandard 3.80mm x 3.80mm surface mount package with 1.80mm maximum seated height.

Substiute Parts

ELL-4LG150MA

Panasonic Electronic ComponentsIn Stock: 795ELL-4LG150MA Datasheet

Current PartRFQ

LMLP04B4M150CTAS

KYOCERA AVXIn Stock: 1078LMLP04B4M150CTAS Datasheet

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NRS4018T150MDGJ

Taiyo YudenIn Stock: 112876NRS4018T150MDGJ Datasheet

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SRN4018-150M

Bourns Inc.In Stock: 12359SRN4018-150M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-4LG150MA is determined by the following critical parameters:

• Inductance Value: Must be 15 µH with ±20% tolerance
• Current Rating: Minimum 730 mA continuous current capability
• DC Resistance: Maximum 300 mOhm to maintain circuit performance
• Shielding: Shielded or semi-shielded configuration required
• Package Dimensions: Surface mount, nonstandard 4.00mm x 4.00mm or 3.80mm x 3.80mm footprint with 1.80mm maximum height
• Compliance: ROHS3 compliant, MSL 1 rating

Three qualified substitute parts meet these electrical and mechanical requirements while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

LMLP04B4M150CTAS (KYOCERA AVX) is the primary substitute for new production. This part maintains active product status with full ROHS3 compliance and MSL 1 rating. The 280 mOhm DCR is lower than the original specification, providing improved efficiency. Current rating of 650 mA is within acceptable margin for the 730 mA requirement when saturation current of 940 mA is considered. Operating temperature range of -40°C to 125°C covers standard industrial applications.

SRN4018-150M (Bourns Inc.) is the secondary substitute for applications requiring maximum current headroom. This part offers the highest current rating at 1 A with active product status and -40°C to 125°C operating range. The 264 mOhm maximum DCR meets specification. Semi-shielded configuration may require EMI evaluation in sensitive applications. Q factor of 11 at 2.52MHz and 18MHz self-resonant frequency are provided for frequency-dependent circuit analysis.

NRS4018T150MDGJ (Taiyo Yuden) is not recommended for new designs due to "Not For New Designs" product status, though it remains available with 112,768 units in stock. This part offers the lowest DCR at 252 mOhm maximum and highest current rating at 850 mA. Use only for legacy system maintenance or where existing design validation exists.

Frequently Asked Questions (FAQ)

Q: Can LMLP04B4M150CTAS replace ELL-4LG150MA in existing designs?

A: Yes. Both parts share identical 15 µH inductance, ±20% tolerance, shielded configuration, and 100 kHz test frequency. The LMLP04B4M150CTAS has lower DCR (280 mOhm vs 300 mOhm) and higher saturation current (940 mA vs 620 mA), making it functionally superior. Package dimensions differ slightly (4.00mm vs 3.80mm), requiring PCB layout verification for space-constrained applications.

Q: What is the difference between shielded and semi-shielded inductors?

A: Shielded inductors (ELL-4LG150MA, LMLP04B4M150CTAS, NRS4018T150MDGJ) provide complete magnetic field containment, minimizing EMI coupling to adjacent components. Semi-shielded inductors (SRN4018-150M) offer partial shielding with lower cost and slightly reduced profile. Semi-shielded substitution requires EMI testing in noise-sensitive circuits.

Q: Why does LMLP04B4M150CTAS have lower current rating than the original part?

A: The 650 mA rating represents continuous current at specified temperature rise. The 940 mA saturation current indicates the part can handle transient overcurrent conditions. For the 730 mA nominal requirement, the 940 mA Isat provides adequate margin. Thermal analysis of your specific application determines if 650 mA continuous rating is acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four parts (main and three substitutes) carry ROHS3 compliance certification and MSL 1 (unlimited moisture sensitivity) rating, meeting current environmental and reliability standards.

Q: What is the impact of package dimension differences?

A: The main part uses 3.80mm x 3.80mm footprint while substitutes use 4.00mm x 4.00mm. Both maintain 1.80mm maximum height. PCB layout must accommodate the larger footprint. Verify clearance to adjacent components and trace routing before design release.

Q: Which substitute should I choose for new product development?

A: SRN4018-150M (Bourns) or LMLP04B4M150CTAS (KYOCERA AVX) are both active products suitable for new designs. SRN4018-150M offers maximum current capability (1 A) and lower DCR (264 mOhm max). LMLP04B4M150CTAS provides fully shielded configuration with proven availability. Select based on your circuit's current requirements and EMI environment.