SD6020-120-R Fixed Inductor Equivalent & Substitute Parts

Part Overview

The SD6020-120-R is a 12 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 1.31 A continuous current with a maximum DC resistance of 138 mOhm and operates across the temperature range of -40°C to 125°C. The part is RoHS Compliant and carries an MSL rating of 1 (Unlimited), indicating robust moisture tolerance suitable for standard manufacturing environments.

The SD6020-120-R is currently in Active product status with 630 pieces available in inventory. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements where alternative electrical or mechanical characteristics may be acceptable within system design parameters.

Key Parameters

Parameter	Value	Unit	Significance for Substitution
Inductance	12	µH	Core electrical specification; must match exactly
Current Rating	1.31	A	Maximum continuous current; substitute must meet or exceed application requirement
DC Resistance (DCR)	138	mOhm Max	Power loss and thermal performance; lower values preferred
Saturation Current (Isat)	1.1	A	Inductor performance limit under peak current conditions
Shielding	Shielded	—	Electromagnetic interference containment; critical for noise-sensitive circuits
Operating Temperature Range	-40 to 125	°C	Environmental compatibility; substitute must cover application temperature envelope
Mounting Type	Surface Mount	—	PCB assembly compatibility
Package Size	6.00 x 6.00 x 2.00	mm	PCB footprint and height clearance constraints
RoHS Status	RoHS Compliant	—	Regulatory compliance requirement
Tolerance	±30%	%	Inductance accuracy specification

Substitute Part Grouping Explanation

Substitute parts for the SD6020-120-R are identified based on strict electrical and mechanical parameter alignment. The substitution logic is governed by the following criteria:

Primary Matching Criteria:

Inductance value must be 12 µH (exact match required)
Tolerance must be ±30% or tighter
Shielding type must be Shielded (electromagnetic containment requirement)
Mounting type must be Surface Mount
Core material must be Ferrite

Secondary Compatibility Criteria:

Current rating of substitute must be sufficient for the application (minimum 1.1 A for standard operation)
DC resistance should not significantly exceed the main part specification to avoid excessive power dissipation
Operating temperature range of substitute must encompass or match the application requirement
RoHS compliance status must be maintained (RoHS Compliant or ROHS3 Compliant acceptable)
Package dimensions must be compatible with PCB layout constraints

Acceptable Variation Parameters:

Current rating may be lower if application peak current does not exceed substitute rating
DC resistance may vary within acceptable thermal design margins
Operating temperature upper limit may be lower if application operates within reduced range
Package footprint may differ slightly if mounting area is available

The CDRH5D18NP-120NC from Sumida America Components Inc. qualifies as a substitute based on matching inductance, shielding, ferrite core material, surface mount configuration, and RoHS compliance status.

Parameter Comparison

Parameter	SD6020-120-R (Eaton)	CDRH5D18NP-120NC (Sumida)	Compatibility Notes
Inductance	12 µH	12 µH	Exact match
Tolerance	±30%	±30%	Identical specification
Current Rating	1.31 A	1.1 A	Substitute rated 0.21 A lower; acceptable if application peak current ≤ 1.1 A
Saturation Current (Isat)	1.1 A	Not specified	Main part saturation point available for reference
DC Resistance (DCR)	138 mOhm Max	153 mOhm Max	Substitute DCR is 15 mOhm higher; verify thermal impact in application
Shielding	Shielded	Shielded	Equivalent EMI containment
Core Material	Ferrite	Ferrite	Identical core type
Operating Temperature	-40 to 125°C	-40 to 100°C	Substitute upper limit 25°C lower; acceptable if application ≤ 100°C
Mounting Type	Surface Mount	Surface Mount	Equivalent assembly compatibility
Package Size (L x W x H)	6.00 x 6.00 x 2.00 mm	5.70 x 5.70 x 2.00 mm	Substitute footprint 0.3 mm smaller in length and width; height identical
RoHS Status	RoHS Compliant	ROHS3 Compliant	Both meet regulatory requirements
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	Different supply format; verify procurement and assembly line compatibility

Engineering Selection Recommendations

Primary Part Selection (SD6020-120-R): Select the SD6020-120-R when the application requires the full 1.31 A current rating, operates at temperatures up to 125°C, or when Tape & Reel packaging is required for automated assembly. This part is Active status with established supply (630 pieces in stock) and provides the lowest DC resistance specification (138 mOhm Max).

Substitute Part Selection (CDRH5D18NP-120NC): The CDRH5D18NP-120NC is suitable as a substitute when all of the following conditions are met:

Application peak current does not exceed 1.1 A
Operating temperature envelope does not exceed 100°C
PCB layout accommodates the slightly smaller 5.70 x 5.70 mm footprint
Cut Tape packaging is compatible with assembly process
Higher DC resistance (153 mOhm Max) does not create unacceptable thermal dissipation

Both parts maintain RoHS compliance and ferrite shielded core construction. The substitute part carries ROHS3 Compliant status, indicating compliance with the most current RoHS directive revision. Inventory availability for the substitute is higher (1006 pieces), which may support extended production runs or supply chain redundancy.

Frequently Asked Questions (FAQ)

Q: Can the CDRH5D18NP-120NC replace the SD6020-120-R in all applications?

A: No. The substitute part has a lower current rating (1.1 A versus 1.31 A) and reduced operating temperature upper limit (100°C versus 125°C). Substitution is valid only when the application operates within these reduced specifications. Verify application current requirements and thermal environment before selection.

Q: What is the impact of the 15 mOhm higher DC resistance in the substitute part?

A: The CDRH5D18NP-120NC has a maximum DC resistance of 153 mOhm compared to 138 mOhm for the SD6020-120-R. At 1.1 A continuous current, this results in approximately 0.25 mW additional power dissipation. Thermal impact depends on circuit design and thermal management. Evaluate power budget and thermal constraints for the specific application.

Q: Are the package dimensions compatible?

A: The substitute part has a slightly smaller footprint (5.70 x 5.70 mm versus 6.00 x 6.00 mm) with identical height (2.00 mm). The smaller footprint may provide layout advantages but requires verification that the PCB pad pattern and component placement accommodate the dimensional difference. Height clearance is equivalent.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) packaging supplies components on tape segments, typically for lower-volume or manual assembly processes. Verify that your assembly equipment and procurement process support the packaging format of the selected part.

Q: Are both parts RoHS compliant?

A: Yes. The SD6020-120-R is RoHS Compliant, and the CDRH5D18NP-120NC is ROHS3 Compliant. Both meet regulatory requirements for hazardous substance restrictions. ROHS3 represents the current revision of the RoHS directive.

Q: What is the inductance tolerance, and does it affect substitution?

A: Both parts carry ±30% inductance tolerance. This tolerance applies to the nominal 12 µH specification, meaning actual inductance may range from 8.4 µH to 15.6 µH. Circuit design must account for this tolerance range. Substitution does not introduce additional tolerance risk.

Q: Can I use the substitute part if my application operates at 110°C?

A: No. The CDRH5D18NP-120NC is rated to 100°C maximum. Operating at 110°C exceeds the specified temperature range and may result in component degradation or failure. Use the SD6020-120-R, which is rated to 125°C, for applications requiring operation above 100°C.

Q: What inventory considerations should I evaluate?

A: The SD6020-120-R has 630 pieces in stock, while the CDRH5D18NP-120NC has 1006 pieces available. For extended production runs or supply chain continuity, the substitute part offers higher inventory availability. Confirm lead times and supply agreements with your component supplier.

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