ELL-ATP100MB Equivalent & Substitute Parts

Part Overview

The ELL-ATP100MB is a 10 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 3.3 A continuous current with 22 mOhm DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part features surface mount packaging with nonstandard corner terminals and operates across industrial temperature ranges.

Key Parameters

Parameter	Value
Inductance	10 µH
Inductance Tolerance	±20%
Current Rating	3.3 A
Current - Saturation (Isat)	3.3 A
DC Resistance (DCR)	22 mOhm
Shielding	Shielded
Mounting Type	Surface Mount
Package Type	Nonstandard, Corner Terminals
Size	10.00 mm × 10.00 mm
Height (Max)	4.50 mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the ELL-ATP100MB is determined by the following critical parameters:

Inductance Value: 10 µH (exact match required)
Current Rating: Minimum 3.3 A continuous current capability
DC Resistance: Maximum 25 mOhm (allowable increase from 22 mOhm baseline)
Shielding: Shielded construction required
Mounting: Surface mount configuration
Package Footprint: 10.00 mm × 10.00 mm base dimensions compatible with original layout
Compliance: ROHS3 compliant, MSL 1 rating

The substitute parts listed below meet these core electrical and mechanical requirements while maintaining compatibility with the original application context.

Parameter Comparison

Parameter	ELL-ATP100MB (Panasonic)	74477110 (Würth Elektronik)	SRU1038-100Y (Bourns Inc.)
Inductance	10 µH	10 µH	10 µH
Inductance Tolerance	±20%	±20%	±30%
Current Rating (Amps)	3.3 A	5 A	3.8 A
Current - Saturation (Isat)	3.3 A	5.5 A	3.6 A
DC Resistance (DCR)	22 mOhm	25 mOhm Max	25 mOhm
Shielding	Shielded	Shielded	Shielded
Core Type	Wirewound	Drum Core, Wirewound	Drum Core, Wirewound
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size / Dimension	10.00 mm × 10.00 mm	12.00 mm × 12.00 mm	10.00 mm × 10.00 mm
Height - Seated (Max)	4.50 mm	6.00 mm	4.10 mm
Operating Temperature	Not specified	-40°C ~ 125°C	-40°C ~ 125°C
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SRU1038-100Y (Bourns Inc.) is the primary substitute for the ELL-ATP100MB. This part maintains identical footprint dimensions (10.00 mm × 10.00 mm), lower profile height (4.10 mm vs. 4.50 mm), and meets all electrical requirements with 3.8 A current rating and 25 mOhm DCR. The SRU1038 series is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Inductance tolerance is ±30% compared to the original ±20%, which must be evaluated against circuit design margins.

74477110 (Würth Elektronik) serves as a secondary substitute with superior current handling (5 A rating, 5.5 A saturation) and lower DCR margin. However, this part requires PCB layout modification due to larger footprint dimensions (12.00 mm × 12.00 mm) and increased height (6.00 mm). The WE-PD series carries AEC-Q200 automotive qualification and is suitable for applications requiring enhanced thermal and current performance. This option is recommended only when board space permits and higher current margin is required.

Both substitute parts maintain ROHS3 compliance, MSL 1 rating, and active production status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the SRU1038-100Y directly replace the ELL-ATP100MB without PCB modification?

A: Yes. The SRU1038-100Y maintains the same 10.00 mm × 10.00 mm footprint as the original part, with a lower profile height (4.10 mm vs. 4.50 mm). No PCB layout changes are required for direct substitution.

Q: What is the impact of the ±30% inductance tolerance on the SRU1038-100Y compared to the original ±20%?

A: The wider tolerance range must be evaluated against circuit design specifications. If the application requires tighter inductance control, component selection or circuit tuning may be necessary. Verify tolerance requirements with circuit simulation or prototype testing.

Q: Why is the 74477110 larger than the original part?

A: The Würth Elektronik 74477110 uses a drum core construction with enhanced current handling (5 A vs. 3.3 A), resulting in larger physical dimensions (12.00 mm × 12.00 mm footprint, 6.00 mm height). This part is suitable only for applications where PCB space permits the larger package.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both the SRU1038-100Y and 74477110 are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, matching the original ELL-ATP100MB specifications.

Q: What is the difference between wirewound and drum core construction?

A: The original ELL-ATP100MB uses standard wirewound construction. Both substitute parts employ drum core wirewound design, which provides improved thermal performance and current handling while maintaining shielded operation. This construction change does not affect electrical compatibility for the specified application parameters.

Q: Which substitute part should I select for new production designs?

A: The SRU1038-100Y is recommended for new designs due to identical footprint compatibility, active production status, and established supply chain availability. The 74477110 is suitable only when higher current margin (5 A vs. 3.3 A) is required and PCB layout can accommodate the larger package dimensions.

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