ELL-4LG101MA Equivalent & Substitute Parts

Part Overview

The ELL-4LG101MA is a 100 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 260 mA with a DC resistance of 2.2Ohm. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain the same inductance value, tolerance, and current rating specifications while meeting modern RoHS3 compliance standards.

Key Parameters

Parameter	Value
Inductance	100 µH
Tolerance	±20%
Current Rating	260 mA
DC Resistance (DCR)	2.2Ohm
Shielding	Shielded
Mounting Type	Surface Mount
Package Size	3.80mm x 3.80mm x 1.80mm (max)
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ELL-4LG101MA are selected based on the following critical parameters:

Inductance Value: Must be 100 µH at 100 kHz test frequency
Tolerance: ±20% acceptable range
Current Rating: Minimum 260 mA continuous rating required
DC Resistance: Maximum allowable DCR to maintain circuit performance
Shielding: Shielded construction to minimize electromagnetic interference
Surface Mount Compatibility: All substitutes must be surface mount technology
Compliance: ROHS3 compliance and MSL 1 rating required

Two active substitute parts meet these criteria: the Bourns SRN4018-101M and the TDK VLCF4020T-101MR26. Both maintain the 100 µH inductance specification and ±20% tolerance while offering improved current ratings and lower DC resistance compared to the obsolete Panasonic part.

Parameter Comparison

Parameter	ELL-4LG101MA (Panasonic)	SRN4018-101M (Bourns)	VLCF4020T-101MR26 (TDK)
Inductance	100 µH	100 µH	100 µH
Tolerance	±20%	±20%	±20%
Current Rating (Amps)	260 mA	420 mA	260 mA
Current - Saturation (Isat)	250 mA	450 mA	260 mA
DC Resistance (DCR)	2.2Ohm	1.596Ohm Max	1.4Ohm Max
Shielding	Shielded	Semi-Shielded	Shielded
Operating Temperature	Not specified	-40°C ~ 125°C	-40°C ~ 105°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package Size (L x W)	3.80mm x 3.80mm	4.00mm x 4.00mm	4.00mm x 4.00mm
Height - Seated (Max)	1.80mm	1.80mm	2.00mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

SRN4018-101M (Bourns) is suitable for applications where increased current headroom is beneficial. This part offers 420 mA current rating and 450 mA saturation current, providing 61% higher current capacity than the original specification. The lower DC resistance of 1.596Ohm Max reduces power dissipation. The semi-shielded construction may be acceptable in applications with moderate EMI requirements. Operating temperature range extends to 125°C. Package dimensions increase to 4.00mm x 4.00mm with identical 1.80mm height.

VLCF4020T-101MR26 (TDK) maintains the exact current rating of 260 mA and provides shielded construction identical to the original part. DC resistance is reduced to 1.4Ohm Max, improving efficiency. Operating temperature range is -40°C ~ 105°C. Package footprint increases to 4.00mm x 4.00mm with height of 2.00mm maximum. This part provides the closest electrical and mechanical match to the original ELL-4LG101MA.

Both substitute parts are active products with full ROHS3 compliance and MSL 1 ratings, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the SRN4018-101M replace the ELL-4LG101MA in all applications?

A: The SRN4018-101M meets the core electrical specifications (100 µH, ±20% tolerance, 260 mA minimum rating). However, it features semi-shielded construction versus the original shielded design. Applications sensitive to electromagnetic interference may require evaluation. The increased package size (4.00mm x 4.00mm versus 3.80mm x 3.80mm) must be verified against PCB layout constraints.

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

A: Shielded inductors provide complete electromagnetic containment, minimizing radiated emissions and susceptibility to external fields. Semi-shielded inductors offer partial shielding, reducing but not eliminating electromagnetic coupling. Selection depends on circuit noise immunity requirements and EMI specifications.

Q: Is the VLCF4020T-101MR26 a direct replacement?

A: The VLCF4020T-101MR26 maintains shielded construction and identical current rating (260 mA) as the original part. The primary differences are reduced DC resistance (1.4Ohm Max versus 2.2Ohm) and increased height (2.00mm versus 1.80mm). PCB layout must accommodate the 0.20mm height increase.

Q: Why do substitute parts have lower DC resistance?

A: Lower DC resistance in modern inductors results from improved winding techniques and ferrite core materials. This reduces power dissipation and heat generation, improving circuit efficiency and reliability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both SRN4018-101M and VLCF4020T-101MR26 are ROHS3 compliant with MSL 1 ratings, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: What packaging formats are available for these substitutes?

A: SRN4018-101M is supplied in Tape & Reel (TR) format. VLCF4020T-101MR26 is available in Cut Tape (CT) and Digi-Reel® format. Packaging selection depends on production volume and assembly equipment compatibility.

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