CDRH125/LDNP-331MC Equivalent & Substitute Parts

Part Overview

The CDRH125/LDNP-331MC is a 330 µH shielded surface mount inductor manufactured by Sumida America Components Inc. This fixed inductor is designed for applications requiring moderate inductance values with controlled DC resistance and current handling capability. The part is classified as Active status and is ROHS3 compliant, making it suitable for modern electronic assemblies. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances and package constraints.

Substiute Parts

CDRH125/LDNP-331MC

Sumida America Components Inc.In Stock: 1105CDRH125/LDNP-331MC Datasheet

Current PartRFQ

DRA125-331-R

Eaton - Electronics DivisionIn Stock: 1587DRA125-331-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDRH125/LDNP-331MC is determined by strict alignment with the following critical parameters:

Inductance Value and Tolerance: The substitute part must provide 330 µH inductance with ±20% tolerance. This is the primary functional specification and cannot be deviated.

Current Rating: The substitute must support a minimum current rating of 850 mA. Substitutes with equal or higher current ratings are acceptable, as they provide equal or improved performance margin.

DC Resistance (DCR): The substitute must exhibit DC resistance equal to or lower than 710 mOhm. Lower DCR values are acceptable as they reduce power dissipation and heat generation.

Shielding Requirement: The substitute must be shielded to maintain electromagnetic compatibility and prevent interference in the target application.

Mounting and Package Compatibility: The substitute must be surface mount with physical dimensions compatible with the 12.00 x 12.00 mm footprint and 6.00 mm maximum seated height. Nonstandard package classification requires verification of mechanical fit.

Operating Temperature Range: The substitute must support the application's operating temperature window. Substitutes with extended temperature ranges are acceptable.

Regulatory Compliance: The substitute must maintain ROHS3 compliance and MSL Level 1 classification to ensure regulatory and supply chain compatibility.

The identified substitute DRA125-331-R meets all critical substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - CDRH125/LDNP-331MC: Select the original part when inventory is available and cost is not a constraint. This part is Active status with 1000 pieces in stock. It meets all specified electrical and mechanical requirements for the application.

Substitute Selection - DRA125-331-R: The DRA125-331-R is a qualified substitute when the CDRH125/LDNP-331MC is unavailable. This part is Active status with 1540 pieces in stock and provides the following advantages:

• Current rating of 998 mA exceeds the 850 mA requirement, providing 17.4% additional margin
• DC resistance of 543 mOhm is 23.5% lower than the 710 mOhm maximum, reducing power dissipation
• Operating temperature range extends to 165°C, providing 65°C additional margin above the specified -40°C to 100°C window
• AEC-Q200 automotive qualification provides additional reliability assurance
• Both parts maintain ROHS3 compliance and MSL Level 1 classification

Physical Compatibility Consideration: The DRA125-331-R footprint is 12.50 x 12.50 mm compared to the main part's 12.00 x 12.00 mm. The 0.50 mm increase in both X and Y dimensions must be verified against PCB layout constraints and assembly clearance requirements before final selection.

Both parts are suitable for direct substitution from an electrical performance standpoint. Selection should be based on PCB layout compatibility, inventory availability, and cost considerations.

Frequently Asked Questions (FAQ)

Q: Can the DRA125-331-R be used as a direct replacement for the CDRH125/LDNP-331MC?

A: The DRA125-331-R is electrically compatible as a substitute. Both parts provide 330 µH inductance with ±20% tolerance, shielded construction, and surface mount configuration. The substitute offers improved electrical performance with lower DCR and higher current rating. Physical compatibility must be verified due to the 0.50 mm larger footprint (12.50 x 12.50 mm vs. 12.00 x 12.00 mm).

Q: What are the key differences between these two inductors?

A: The main electrical differences are: (1) Current rating: DRA125-331-R provides 998 mA versus 850 mA, (2) DC Resistance: DRA125-331-R is 543 mOhm versus 710 mOhm maximum, (3) Operating temperature: DRA125-331-R extends to 165°C versus 100°C, (4) Construction: DRA125-331-R is wirewound type with AEC-Q200 rating. Physical difference: DRA125-331-R is 0.50 mm larger in footprint dimensions.

Q: Does the larger footprint of the DRA125-331-R affect compatibility?

A: The DRA125-331-R is 0.50 mm larger in both X and Y dimensions (12.50 x 12.50 mm versus 12.00 x 12.00 mm). The seated height remains identical at 6.00 mm maximum. PCB layout must be reviewed to confirm adequate clearance around the component placement area. If the original design has tight spacing constraints, physical verification is required before substitution.

Q: Are both parts RoHS compliant?

A: Yes, both the CDRH125/LDNP-331MC and DRA125-331-R are ROHS3 compliant. Both parts also carry MSL Level 1 (Unlimited) moisture sensitivity classification, indicating no special moisture control requirements during storage and handling.

Q: What is the significance of the AEC-Q200 rating on the DRA125-331-R?

A: AEC-Q200 is an automotive industry qualification standard for passive components. This certification indicates the DRA125-331-R has undergone additional reliability testing and qualification for automotive applications. This provides additional assurance of component reliability and consistency, though it is not required for non-automotive applications.

Q: Can I use the CDRH125/LDNP-331MC in place of the DRA125-331-R?

A: The CDRH125/LDNP-331MC can be used as a substitute for the DRA125-331-R from an electrical standpoint, as both provide 330 µH inductance with identical tolerance and shielding. However, the main part has lower current rating (850 mA vs. 998 mA) and higher DCR (710 mOhm vs. 543 mOhm), which may not be suitable if the application requires the improved performance characteristics of the DRA125-331-R.

Q: What should I verify before implementing the DRA125-331-R as a substitute?

A: Verification steps include: (1) Confirm PCB layout accommodates the 12.50 x 12.50 mm footprint with adequate clearance, (2) Verify assembly equipment can handle the slightly larger component dimensions, (3) Confirm the lower DCR and higher current rating do not introduce unintended circuit behavior changes, (4) Validate that the extended operating temperature range (-40°C to 165°C) is compatible with application requirements.