ELL-4LG470MA Equivalent & Substitute Parts

Part Overview

The ELL-4LG470MA is a 47 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 410 mA continuous current with 920mOhm DC resistance. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part is surface-mounted in a nonstandard 3.80mm x 3.80mm package with 1.80mm maximum seated height, designed for 100 kHz inductance testing frequency.

Substiute Parts

ELL-4LG470MA

Panasonic Electronic ComponentsIn Stock: 948ELL-4LG470MA Datasheet

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NR4018T470M

Taiyo YudenIn Stock: 5460NR4018T470M Datasheet

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SRN4018-470M

Bourns Inc.In Stock: 11910SRN4018-470M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-4LG470MA is determined by the following critical parameters:

• Inductance Value: Must be 47 µH at 100 kHz test frequency
• Tolerance: ±20% acceptable range
• Current Rating: Minimum 410 mA continuous current capability
• DC Resistance: Maximum 920mOhm (lower values acceptable for improved thermal performance)
• Mounting Type: Surface mount configuration required
• Package Footprint: 3.80mm x 3.80mm or 4.00mm x 4.00mm compatible with board layout constraints
• Height: Maximum 1.80mm seated height for PCB clearance
• Compliance: ROHS3 compliant, MSL 1 rating

Two substitute parts meet these criteria: NR4018T470M (Taiyo Yuden) and SRN4018-470M (Bourns Inc.). Both maintain the 47 µH inductance specification, support the required current ratings, and comply with environmental standards. The NR4018T470M operates within the original current specification (420 mA), while the SRN4018-470M provides enhanced current capacity (600 mA) with semi-shielded construction.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Closest Electrical Match): The NR4018T470M from Taiyo Yuden provides the closest electrical equivalence to the ELL-4LG470MA. It maintains shielded construction, matches the current rating specification (420 mA vs. 410 mA), and reduces DC resistance to 780mOhm maximum. The part is ROHS3 compliant with MSL 1 rating. However, the NR4018T470M is classified as "Not For New Designs," limiting its suitability for long-term production.

For New Designs and Active Production: The SRN4018-470M from Bourns Inc. is the recommended substitute for applications requiring ongoing component availability. This part is classified as Active, ensuring long-term supply chain stability. It exceeds the original current rating (600 mA vs. 410 mA), provides superior saturation current (620mA), and maintains the same DC resistance specification (780mOhm maximum). The semi-shielded construction and extended operating temperature range (-40°C ~ 125°C) provide additional design flexibility. ROHS3 compliance and MSL 1 rating are maintained.

Package Footprint Consideration: Both substitute parts use a 4.00mm x 4.00mm footprint compared to the original 3.80mm x 3.80mm. PCB layout verification is required to confirm compatibility with existing board designs. Seated height remains constant at 1.80mm maximum.

Frequently Asked Questions (FAQ)

Q: Can the NR4018T470M or SRN4018-470M be used as direct drop-in replacements for the ELL-4LG470MA?

A: Both parts meet the critical electrical specifications (47 µH inductance, ±20% tolerance, current rating, DC resistance, and shielding requirements). However, the footprint increases from 3.80mm x 3.80mm to 4.00mm x 4.00mm. PCB layout verification is necessary to confirm pad spacing and clearance compatibility before implementation.

Q: What is the difference between shielded and semi-shielded construction in the SRN4018-470M?

A: The ELL-4LG470MA and NR4018T470M feature fully shielded construction, which provides maximum electromagnetic interference (EMI) containment. The SRN4018-470M uses semi-shielded construction, which reduces EMI containment slightly but maintains adequate performance for most applications. Selection depends on specific EMI requirements in the target circuit.

Q: Why is the SRN4018-470M recommended over the NR4018T470M despite different shielding?

A: The SRN4018-470M is classified as Active, ensuring long-term availability and supply chain continuity. The NR4018T470M is classified as "Not For New Designs," indicating limited future production support. For applications requiring component availability beyond the near term, the SRN4018-470M is the preferred choice.

Q: Are there any temperature operating range differences that affect substitution?

A: The ELL-4LG470MA does not specify an operating temperature range. The NR4018T470M operates from -25°C to 120°C, while the SRN4018-470M operates from -40°C to 125°C. If the application requires operation below -25°C or above 120°C, the SRN4018-470M is the only suitable substitute.

Q: Do all three parts meet RoHS and MSL requirements?

A: Yes. The ELL-4LG470MA, NR4018T470M, and SRN4018-470M are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. No additional handling or storage precautions are required beyond standard component management practices.

Q: What is the significance of the saturation current (Isat) differences?

A: Saturation current indicates the point at which the inductor's inductance begins to degrade under high current stress. The ELL-4LG470MA has Isat of 360mA, while both substitutes exceed this specification (570mA for NR4018T470M, 620mA for SRN4018-470M). This provides additional design margin and reduces the risk of inductance collapse in transient current conditions.