ELL-ATV331M Equivalent & Substitute Parts

Part Overview

The Panasonic ELL-ATV331M is a 330 µH shielded drum core wirewound inductor rated for 550 mA with 550mOhm DC resistance, designed for surface mount applications. This component is classified as obsolete, necessitating identification of active equivalent parts that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Inductance	330 µH
Inductance Tolerance	±20%
Current Rating	550 mA
DC Resistance (DCR)	550mOhm
Core Type	Ferrite Drum Core, Shielded
Mounting Type	Surface Mount
Package Dimensions	10.00mm x 10.00mm x 4.50mm (Max Height)
Inductance Test Frequency	100 kHz
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ELL-ATV331M are selected based on the following critical parameters:

Primary Matching Criteria:

Inductance value: 330 µH (fixed requirement)
Inductance tolerance: ±20% or tighter
Current rating: minimum 550 mA
DC resistance: within acceptable operating range
Core material: Ferrite
Shielding: Shielded configuration
Mounting: Surface mount
Package footprint: 10.00mm x 10.00mm nominal
Compliance: ROHS3 compliant

Substitution Logic: Parts are grouped into two categories based on shielding configuration and electrical performance:

Group 1 - Shielded Equivalents (Recommended for Direct Replacement): Parts maintaining shielded drum core construction with current ratings at or above 550 mA and comparable DC resistance profiles.

Group 2 - Unshielded Alternative: Part with unshielded construction, suitable only where electromagnetic shielding is not a circuit requirement.

Parameter Comparison

Part Number	Manufacturer	Inductance	Tolerance	Current Rating (mA)	DCR (Ohm)	Shielding	Isat (mA)	Package Dimensions (mm)	Height Max (mm)	Status
ELL-ATV331M	Panasonic	330 µH	±20%	550	0.550	Shielded	—	10.00 x 10.00	4.50	Obsolete
SRU1038-331Y	Bourns Inc.	330 µH	±30%	550	0.773	Shielded	520	10.00 x 10.00	4.10	Active
B82464G4334M000	EPCOS - TDK Electronics	330 µH	±20%	590	0.650	Shielded	650	10.40 x 10.40	4.80	Active
B82464P4334M000	EPCOS - TDK Electronics	330 µH	±20%	590	0.650	Shielded	650	10.40 x 10.40	4.80	Active
7447714331	Würth Elektronik	330 µH	±20%	710	0.750	Shielded	1000	10.00 x 10.00	5.00	Active
SDR1045-331K	Bourns Inc.	330 µH	±10%	620	1.700	Unshielded	700	10.00 x 10.00	4.80	Active

Engineering Selection Recommendations

For Direct Replacement (Shielded Configuration Required):

The SRU1038-331Y (Bourns Inc.) provides the closest electrical and mechanical match to the ELL-ATV331M. It maintains identical current rating (550 mA), shielded construction, and footprint dimensions (10.00mm x 10.00mm). The part is active with ROHS3 compliance and unlimited moisture sensitivity rating. Slightly elevated DCR (773mOhm vs. 550mOhm) and broader tolerance (±30% vs. ±20%) are acceptable for most applications requiring the original specification.

For Enhanced Performance (Shielded Configuration Required):

The B82464G4334M000 and B82464P4334M000 (EPCOS - TDK Electronics) offer improved current handling (590 mA) with tighter inductance tolerance (±20%) and AEC-Q200 automotive qualification. Extended operating temperature range (-55°C to 150°C) supports demanding environments. Slightly larger footprint (10.40mm x 10.40mm) requires PCB layout verification.

The 7447714331 (Würth Elektronik) delivers the highest current capacity (710 mA) with AEC-Q200 rating and extended temperature range (-40°C to 125°C). Footprint matches the original (10.00mm x 10.00mm) with slightly increased height (5.00mm). Series designation WE-PD Performance indicates active product line support.

For Unshielded Applications Only:

The SDR1045-331K (Bourns Inc.) is suitable only where electromagnetic shielding is not required. It offers superior inductance tolerance (±10%), higher current rating (620 mA), and higher saturation current (700 mA). Significantly elevated DCR (1.7Ohm) results in higher power dissipation and is not compatible with shielded circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the SDR1045-331K replace the ELL-ATV331M directly?

A: No. The SDR1045-331K is unshielded, while the ELL-ATV331M is shielded. Use SDR1045-331K only if circuit design does not require electromagnetic shielding. The 1.7Ohm DCR also introduces significantly higher power dissipation compared to the original 550mOhm specification.

Q: What is the impact of different DCR values on circuit performance?

A: DC resistance directly affects power dissipation (P = I²R) and voltage drop across the inductor. Higher DCR values increase heat generation and reduce circuit efficiency. The SRU1038-331Y (773mOhm) and B82464 series (650mOhm) show modest increases over the original 550mOhm. The SDR1045-331K (1.7Ohm) represents a significant increase unsuitable for low-loss applications.

Q: Are the EPCOS B82464G4334M000 and B82464P4334M000 interchangeable?

A: Both parts share identical electrical specifications (330 µH, ±20%, 590 mA, 650mOhm DCR) and physical dimensions. The primary difference is series designation (G4 vs. P4). Verify with EPCOS - TDK Electronics documentation for application-specific compatibility before substitution.

Q: What does AEC-Q200 qualification mean?

A: AEC-Q200 is an automotive electronics qualification standard. Parts meeting this standard undergo rigorous testing for reliability in automotive environments. The B82464 series and 7447714331 carry this certification, making them suitable for automotive and high-reliability applications.

Q: Does footprint size difference affect PCB layout?

A: Yes. The B82464 series (10.40mm x 10.40mm) is slightly larger than the original (10.00mm x 10.00mm). Verify available PCB space before substitution. The SRU1038-331Y and 7447714331 maintain the original 10.00mm x 10.00mm footprint.

Q: What is the significance of inductance tolerance differences?

A: Tighter tolerance (±10% or ±20%) ensures more precise inductance values, critical for frequency-dependent circuits. The original ELL-ATV331M and most substitutes specify ±20%. The SDR1045-331K offers ±10% tolerance for applications requiring higher precision. The SRU1038-331Y tolerance of ±30% is acceptable for general-purpose filtering and energy storage applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting environmental and hazardous substance restrictions for electronic components.

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