0420CDMCBDS-2R2MC Equivalent & Substitute Parts

Part Overview

The 0420CDMCBDS-2R2MC is a 2.2 µH shielded wirewound inductor manufactured by Sumida America Components Inc., rated for 3.9 A continuous current with 35 mOhm DC resistance. This component is designed for surface mount applications in compact 2-SMD packages and operates across the industrial temperature range of -40°C to 105°C.

The 0420CDMCBDS-2R2MC has reached obsolete product status. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring 2.2 µH inductance in this form factor and current rating.

Key Parameters

Parameter	Value
Inductance	2.2 µH
Tolerance	±20%
Current Rating	3.9 A
DC Resistance (DCR)	35 mOhm
Saturation Current (Isat)	4.5 A
Shielding	Shielded
Package Type	2-SMD
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to 105°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 0420CDMCBDS-2R2MC are identified based on the following critical parameters:

Primary Matching Criteria:

Inductance value: 2.2 µH (exact match required)
Inductance tolerance: ±20% (matching tolerance band)
Package type: 2-SMD surface mount (identical form factor)
Shielding: Shielded construction (electromagnetic containment requirement)
Current rating: Minimum 3.9 A continuous current capability
DC resistance: Comparable performance (≤100 mOhm acceptable range for this category)

Compliance Requirements:

RoHS3 compliance (environmental regulation alignment)
MSL 1 rating (moisture sensitivity compatibility)
Operating temperature range: Minimum -40°C to 105°C coverage

The SRP4020TA-2R2M from Bourns Inc. meets all primary matching criteria and maintains full compliance with applicable standards. This part is currently in active production status, ensuring long-term availability.

Parameter Comparison

Parameter	0420CDMCBDS-2R2MC (Sumida)	SRP4020TA-2R2M (Bourns)	Match Status
Inductance	2.2 µH	2.2 µH	Exact Match
Tolerance	±20%	±20%	Exact Match
Current Rating (Amps)	3.9 A	4 A	Compatible (Higher Rating)
Saturation Current (Isat)	4.5 A	6 A	Compatible (Higher Rating)
DC Resistance (DCR)	35 mOhm	61 mOhm Max	Compatible (Within Range)
Shielding	Shielded	Shielded	Exact Match
Package / Case	2-SMD	2-SMD	Exact Match
Size / Dimension	4.50mm L x 4.10mm W	4.45mm L x 4.06mm W	Compatible (Equivalent Footprint)
Height - Seated (Max)	2.00mm	2.00mm	Exact Match
Operating Temperature Range	-40°C to 105°C	-40°C to 150°C	Compatible (Extended Range)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Exact Match
Moisture Sensitivity Level	MSL 1	MSL 1	Exact Match
Product Status	Obsolete	Active	Substitute is Active

Engineering Selection Recommendations

The SRP4020TA-2R2M is a direct functional substitute for the obsolete 0420CDMCBDS-2R2MC based on the following engineering factors:

Electrical Compatibility: The substitute part maintains identical inductance value and tolerance specification. Current rating and saturation current are both higher than the original part, providing improved performance margin. DC resistance is within acceptable operational range for this inductor category.

Physical Compatibility: Package dimensions are equivalent within manufacturing tolerances. Both parts use identical 2-SMD surface mount packaging with matching 2.00mm seated height, ensuring PCB layout compatibility without redesign.

Compliance and Certification: Both parts maintain ROHS3 compliance and MSL 1 rating. The substitute part carries AEC-Q200 automotive qualification, providing additional reliability assurance. Operating temperature range of the substitute extends to 150°C, exceeding the original specification.

Supply Chain Status: The substitute part is in active production status with established inventory levels, ensuring reliable long-term availability compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the SRP4020TA-2R2M directly replace the 0420CDMCBDS-2R2MC without PCB modifications?

A: Yes. Both parts share identical 2-SMD package dimensions, 2.00mm maximum seated height, and equivalent footprints. No PCB layout changes are required for mechanical or electrical integration.

Q: What is the impact of the higher DC resistance (61 mOhm vs. 35 mOhm) in the substitute part?

A: The substitute part's higher DC resistance results in increased power dissipation under load. For the 3.9 A rated current of the original design, this represents an additional thermal load of approximately 0.6 W. Thermal analysis should confirm adequate heat dissipation in the application circuit.

Q: Does the extended operating temperature range of the substitute part affect compatibility?

A: No. The substitute part's -40°C to 150°C range fully encompasses the original specification of -40°C to 105°C. This provides additional operational margin and does not introduce compatibility issues.

Q: Are there any certifications or qualifications that differ between these parts?

A: The substitute part includes AEC-Q200 automotive qualification, which the original part does not specify. Both parts maintain ROHS3 compliance and MSL 1 rating. The substitute's additional qualification does not create incompatibility.

Q: What is the inductance tolerance band for both parts?

A: Both parts specify ±20% inductance tolerance at 100 kHz test frequency. This identical tolerance ensures equivalent circuit performance and design margin calculations.

Q: Is the substitute part available in the same packaging format (Cut Tape and Digi-Reel)?

A: The substitute part is available in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both manual assembly and automated reel-fed production processes.

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