ELL-ATV330M Equivalent & Substitute Parts

Part Overview

The Panasonic ELL-ATV330M is a 33 µH shielded drum core wirewound inductor rated for 1.8 A with 62 mOhm DC resistance, designed for surface mount applications in the 10.00mm x 10.00mm footprint. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain the core inductance value, current rating compatibility, and shielding characteristics while meeting modern component availability and compliance requirements.

Key Parameters

Parameter	Value
Inductance	33 µH
Inductance Tolerance	±20%
Current Rating	1.8 A
DC Resistance (DCR)	62 mOhm
Shielding	Shielded
Core Material	Ferrite
Mounting Type	Surface Mount
Package Footprint	10.00mm x 10.00mm
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Inductance Value: Must be 33 µH (±20% tolerance acceptable)
Current Rating: Must support minimum 1.8 A continuous operation
Shielding Type: Shielded configuration required to maintain electromagnetic isolation
Core Material: Ferrite drum core construction
Mounting: Surface mount, nonstandard 10.00mm x 10.00mm footprint
Compliance: ROHS3 compliant, MSL 1 rating

The substitute parts are grouped into two categories based on shielding and DC resistance characteristics:

Category A (Shielded, Lower DCR): Parts maintaining shielded construction with DCR ≤ 86 mOhm, suitable for direct replacement in applications where electromagnetic interference mitigation is critical.

Category B (Unshielded, Higher Current): Parts with unshielded construction and higher current ratings, applicable only when shielding is not a circuit requirement.

Parameter Comparison

Parameter	ELL-ATV330M (Main)	7447714330 (Würth)	SDR1045-330M (Bourns)	SRU1038-330Y (Bourns)
Inductance	33 µH	33 µH	33 µH	33 µH
Inductance Tolerance	±20%	±20%	±20%	±30%
Current Rating (Amps)	1.8 A	2.5 A	1.9 A	1.8 A
DC Resistance (DCR)	62 mOhm	79 mOhm Max	220 mOhm Max	86 mOhm
Shielding	Shielded	Shielded	Unshielded	Shielded
Core Material	Ferrite	Ferrite	Ferrite	Ferrite
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Footprint	10.00mm x 10.00mm	10.00mm x 10.00mm	10.00mm x 10.00mm	10.00mm x 10.00mm
Height (Max)	4.50mm	5.00mm	4.80mm	4.10mm
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: Würth Elektronik 7447714330

The 7447714330 is the preferred substitute for the ELL-ATV330M. It maintains shielded construction, exceeds the current rating requirement (2.5 A vs. 1.8 A), and operates within the specified temperature range (-40°C to 125°C). The DCR of 79 mOhm is within acceptable tolerance for most applications. This part carries AEC-Q200 automotive qualification and is actively manufactured with confirmed inventory availability.

Secondary Substitute: Bourns SRU1038-330Y

The SRU1038-330Y provides shielded construction with matched current rating (1.8 A) and lower DCR (86 mOhm). The inductance tolerance is ±30%, which is wider than the original ±20% specification. This part is actively produced with high inventory levels and operates across the full temperature range.

Alternative (Unshielded): Bourns SDR1045-330M

The SDR1045-330M is applicable only in applications where electromagnetic shielding is not required. The unshielded construction and significantly higher DCR (220 mOhm) make this suitable for circuits tolerant of these characteristics. Current rating of 1.9 A meets the minimum requirement.

Frequently Asked Questions (FAQ)

Q: Can the SDR1045-330M replace the ELL-ATV330M in all applications?

A: No. The SDR1045-330M is unshielded, whereas the ELL-ATV330M is shielded. Use the SDR1045-330M only if your circuit design does not require electromagnetic isolation. Additionally, the DCR is significantly higher (220 mOhm vs. 62 mOhm), which may affect circuit performance in current-sensitive applications.

Q: What is the impact of the height difference between substitutes?

A: The ELL-ATV330M has a maximum seated height of 4.50mm. The 7447714330 reaches 5.00mm, and the SRU1038-330Y is 4.10mm. Verify PCB clearance and component placement constraints before selection. Height differences may affect board assembly and enclosure fit.

Q: Are all substitutes compatible with the same PCB footprint?

A: Yes. All substitute parts maintain the 10.00mm x 10.00mm footprint and surface mount configuration. However, verify height clearance as noted above.

Q: Does the inductance tolerance difference matter?

A: The SRU1038-330Y has ±30% tolerance versus the original ±20%. For circuits with tight inductance specifications, this wider tolerance may require circuit validation. The 7447714330 and SDR1045-330M maintain ±20% tolerance.

Q: Which substitute has the best long-term availability?

A: The Bourns SRU1038-330Y shows the highest inventory level (6,778 pcs) and is actively manufactured. The Würth 7447714330 (1,916 pcs) and Bourns SDR1045-330M (993 pcs) also have active production status with confirmed stock.

Q: Are all substitutes RoHS and MSL compliant?

A: Yes. All substitute parts are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the original part specifications.

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