ELL-ATV221M Equivalent & Substitute Parts

Part Overview

The ELL-ATV221M is a 220 µH shielded drum core wirewound inductor manufactured by Panasonic Electronic Components, rated for 700 mA with a DC resistance of 360mOhm. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part operates at 100 kHz inductance test frequency and is housed in a nonstandard surface mount package measuring 10.00mm × 10.00mm × 4.50mm (max height).

Key Parameters

Parameter	ELL-ATV221M
Inductance	220 µH
Inductance Tolerance	±20%
Current Rating	700 mA
DC Resistance (DCR)	360mOhm
Shielding	Shielded
Core Material	Ferrite
Mounting Type	Surface Mount
Package Dimensions	10.00mm L × 10.00mm W × 4.50mm H (max)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-ATV221M is determined by the following critical parameters:

Inductance Value: Must be 220 µH (exact match required)
Core Type: Ferrite drum core wirewound construction
Mounting: Surface mount, nonstandard package
Current Handling: Minimum 700 mA rating required
DC Resistance: Must not exceed application limits; lower DCR values are acceptable
Shielding: Shielded construction preferred to maintain electromagnetic isolation
Compliance: ROHS3 compliance required

Two active substitute parts meet these criteria: the Bourns SDR1045-221K and Bourns SRU1038-221Y. Both maintain the 220 µH inductance specification, ferrite core construction, and surface mount configuration. The SDR1045-221K offers higher current capacity (720 mA) with unshielded construction, while the SRU1038-221Y provides shielded construction with 650 mA capacity and comparable DC resistance characteristics.

Parameter Comparison

Parameter	ELL-ATV221M (Panasonic)	SDR1045-221K (Bourns)	SRU1038-221Y (Bourns)
Inductance	220 µH	220 µH	220 µH
Inductance Tolerance	±20%	±10%	±30%
Current Rating (Amps)	700 mA	720 mA	650 mA
Current - Saturation (Isat)	—	850 mA	650 mA
DC Resistance (DCR)	360mOhm	1.15Ohm Max	565mOhm
Shielding	Shielded	Unshielded	Shielded
Core Material	Ferrite	Ferrite	Ferrite
Q @ Freq	—	15 @ 796kHz	22 @ 796kHz
Frequency - Self Resonant	—	6.4 MHz	4 MHz
Operating Temperature	—	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package Dimensions	10.00mm L × 10.00mm W × 4.50mm H (max)	10.00mm L × 10.00mm W × 4.80mm H (max)	10.00mm L × 10.00mm W × 4.10mm H (max)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

SRU1038-221Y (Bourns) is the primary substitute for the ELL-ATV221M. This part maintains shielded construction matching the original design, operates within the required current range (650 mA), and provides active product status with full ROHS3 compliance and REACH unaffected certification. The DC resistance of 565mOhm is comparable to the original 360mOhm specification. Height clearance is improved at 4.10mm maximum seated height.

SDR1045-221K (Bourns) serves as an alternative where unshielded construction is acceptable. This part offers superior current capacity (720 mA) and lower inductance tolerance (±10%), but introduces higher DC resistance (1.15Ohm Max) and lacks electromagnetic shielding. Selection of this part requires confirmation that EMI isolation is not critical to circuit performance.

Both substitutes are active products with established supply chains, ROHS3 compliance, and operating temperature ranges of -40°C to 125°C, providing long-term availability and regulatory compliance advantages over the obsolete ELL-ATV221M.

Frequently Asked Questions (FAQ)

Q: Can the SDR1045-221K replace the ELL-ATV221M in all applications?

A: The SDR1045-221K matches the 220 µH inductance and exceeds current capacity requirements. However, it is unshielded while the original is shielded. Substitution is valid only where electromagnetic isolation is not required for circuit operation or where EMI performance can be independently managed.

Q: What is the impact of higher DC resistance in the SDR1045-221K?

A: The SDR1045-221K exhibits 1.15Ohm maximum DCR compared to the original 360mOhm. This increases resistive losses and heat generation. Circuit analysis must confirm that the higher resistance does not degrade performance in current-limiting or filtering applications.

Q: Is the SRU1038-221Y suitable for applications requiring 700 mA continuous current?

A: The SRU1038-221Y is rated for 650 mA continuous current, which is below the original 700 mA specification. Applications operating at or near 700 mA require derating analysis or selection of the SDR1045-221K (720 mA rating). The saturation current of 650 mA indicates the part reaches saturation at this level.

Q: Are there package compatibility concerns with the substitute parts?

A: All three parts share the same 10.00mm × 10.00mm footprint. Height differences are minimal: ELL-ATV221M (4.50mm max), SDR1045-221K (4.80mm max), and SRU1038-221Y (4.10mm max). PCB layout and component clearance must be verified for the SDR1045-221K due to its slightly increased height.

Q: Do the substitute parts meet the same compliance requirements?

A: Both Bourns substitutes are ROHS3 compliant and carry REACH unaffected certification. The original ELL-ATV221M is ROHS3 compliant with MSL 1 (Unlimited). All parts share identical ECCN (EAR99) and HTSUS (8504.50.4000) classifications, ensuring regulatory equivalence.

Q: What is the difference in inductance tolerance between the parts?

A: The ELL-ATV221M specifies ±20% tolerance, the SDR1045-221K ±10%, and the SRU1038-221Y ±30%. Tighter tolerance (SDR1045-221K) may improve circuit performance in precision applications, while wider tolerance (SRU1038-221Y) requires circuit margin analysis to ensure acceptable performance across the tolerance band.

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